New and Revised Barley Genetic Stock Descriptions

BGS 38, Seminudoides 1, smn1

Stock number: BGS 38

Locus name: Seminudoides 1

Locus symbol: smn1

Previous nomenclature and gene symbolization:

Seminuoides = smn (3, 4).

Inheritance:

Monofactorial recessive (3, 4).

Located in chromosome 7HS [1S], based on linkage drag with the ant1 (anthocyanin-less 1) locus (2).

Description:

The caryopsis of smn1 plants is not completely covered because gaps develop between the margins of the lemma and palea. Adherence of the lemma and the palea to the pericarp is poor, but the grain does not thresh free from the hull at maturity. Tiller number and grain yield are often reduced (1, 4).

Origin of mutant:

An X-ray induced mutant in Haisa (PI 197617) (3, 4).

Mutational events:

smn1.a in Haisa (Mut. 4128) (4).

Mutant used for description and seed stocks:

smn1.a in Haisa (Mut. 4128, GSHO 1602); smn1.a in Bowman (PI 483237)*4.

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

3. Scholz, F. 1956. Mutationsversuche an Kulturpflanzen. V. Die Vererbung zweier sich variabel manifestierender Übergangsmerkmale von bespelzter zu nackter Gerste bei röntgeninduzierten Mutanten. Kulturpflanze 4:228-246.

4. Scholz, F., and O. Lehmann. 1958. Die Gaterslebener Mutanten der Saatgerste in Beziehung zur Formenmannigfaltigkeit der Art Hordeum vulgare L.s.l.I. Kulturpflanze 6:123-166.

Prepared:

J.D. Franckowiak and U. Lundqvist. 2002. BGN 32:78.

BGS 39, Midseason stripe 2, mss2

Stock number: BGS 39

Locus name: Midseason stripe 2

Locus symbol: mss2

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (2).

Located in chromosome 7HS [1S], based on linkage drag with the Lga (Long glume awn) and dsp1 (dense spike 1) loci (2, 3).

Description:

A variable number of broad, white stripes develop in tillers during the joining stage. Leaves and spikes show white sectors which persist until maturity. Expression of mss2 is temperature dependent with few or no stripes developing in cool environments and numerous white stripes in warm environments. When numerous stripes develop, spike length, and plant vigor are reduced (1).

Origin of mutant:

A spontaneous mutant in breeding line ND11258 (Bowman*2/ND7556) (1).

Mutational events:

mss2.b in ND11258 (2).

Mutant used for description and seed stocks:

mss2.b in ND11258 (GSHO 2409); mss2.b in Bowman (PI 483237)*7 (GSHO 2148).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

3. Kleinhofs, A. 1999. Coordinator=s report: Integrating barley molecular and morphological/physiological marker maps. BGN 29:58-59.

Prepared:

J.D. Franckowiak. 2002. BGN 32:79.

BGS 40, Premature ripe 1, prm1

Stock number: BGS 40

Locus name: Premature ripe 1

Locus symbol: pmr1

Previous nomenclature and gene symbolization:

Premature ripe = pmr (3).

Inheritance:

Monofactorial recessive (2).

Located in chromosome 7HS [1S], based on linkage drag with the Lga (long glume awn) locus (3), near the centromere (5, 6).

Description:

The prm1 gene induces plants to start dying about two weeks after heading. Seedlings are slightly pale green in color and plants are shorter than normal sibs. The lighter shade of green persists until senescence of the plants begins. Premature dying is associated with rapid collapse of the straw and very thin grain (2).

Origin of mutant:

A sodium azide induced mutant in Glenn (CIho 15769) (1).

Mutational events:

pmr1.a in Glenn (DWS1069) (4).

Mutant used for description and seed stocks:

pmr1.a in Glenn (GSHO 2429), pmr1.a in Bowman (PI 483237)*7.

References:

1. Faue, A.C. 1987. Chemical mutagenesis as a breeding tool for barley. M.S. Thesis. North Dakota State Univ., Fargo.

2. Franckowiak, J.D. (Unpublished).

3. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Kleinhofs, A. 1997. Integrating barley RFLP and classical marker maps. BGN 27:105-112.

6. Kudrna, D., A. Kleinhofs, A. Kilian, and J. Soule. 1996. Integrating visual markers with the Steptoe x Morex RFLP map. Vol. 1. p. 343. In A.E. Slinkard, G.J. Scoles, and B.G. Rossnagel (eds.). Barley Genetics VII. Proc. Fifth Int. Oat Conf. & Seventh Int. Barley Genet. Symp., Saskatoon. Univ. Ext. Press, Univ. of Saskatchewan, Saskatoon, Canada.

Prepared:

J.D. Franckowiak. 2002. BGN 32:80.

BGS 41, Brachytic 7, brh7

Stock number: BGS 41

Locus name: Brachytic 7

Locus symbol: brh7

Previous nomenclature and gene symbolization:

Brachytic-w = brh.w (2).

Inheritance:

Monofactorial recessive (2, 4).

Located in chromosome 7HS [1S], based on linkage drag with the ant1 (anthocyanin-less 1) locus (3).

Description:

Plants are 3/4 to 5/6 of normal height and awns are about 3/4 of normal length. The seedling leaf of brh7 plants is short and wide and leaf blades are wider than those of normal sibs.. Grain from brh7 plants seem plumper and more globose shaped than those from normal sibs (1).

Origin of mutant:

An induced mutant in Volla (PI 280423) (5).

Mutational events:

brh7.w in Volla (7101, DWS1211) (4, 5).

Mutant used for description and seed stocks:

brh7.w in Volla (GSHO 1687); brh7.w in Bowman (PI 483237)*6 (GSHO 1943).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. BGN 24:56-59.

3. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Gaul, H. 1986. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:81.

BGS 42, Pyramidatum 1, Pyr1

Stock number: BGS 42

Locus name: Pyramidatum 1

Locus symbol: Pyr1

Previous nomenclature and gene symbolization:

Pyramidatum g = Pyr.g (3).

Inheritance:

Monofactorial incomplete dominant (2).

Located in chromosome 7HS [1S], based on linkage drag with the ant1 (anthocyanin-less 1) locus (2).

Description:

Spikes are about 2/3 of normal length and have rachis internode length values of about 2.5 mm. Plants homozygous for Pyr1.g have pyramid-shaped spikes because lower rachis internodes shorter than upper ones. Spikes of heterozygous are parallel or strap-shaped. Plants homozygous for Pyr1.a are slightly shorter and have stiffer straw (2). Hayes and Harlan (5) reported that one gene controlled spike density in the line Pyramidatum. Spike shape, parallel vs. truncate pyramidal, is considered of limited value as a key character, but it is used in description of barley cultivars (1).

Origin of mutant:

Probably natural occurrence in Finnish cultivars, but isolated from a backcross of Pokko (PI 467770) to Hja80001 (GSHO 1689, DWS1246), which is a gamma-ray induced, brachytic mutant from Aapo (PI 467771) (2, 6).

Mutational events:

Pyr1.g in Hja64202 (Pokko*3/Hja80001, DWS1242) (2, 4).

Mutant used for description and seed stocks:

Pyr1.g in Hja64202 (GSHO 1581); Pyr1.g in Bowman (PI 483237)*7 (GSHO 2149).

References:

1. Åberg, E., and G.A. Wiebe. 1946. Classification of barley varieties grown in the United States and Canada in 1945. U. S. Dept. Agr. Tech. Bul. 907. 190 pp., illus.

2. Franckowiak, J.D. (Unpublished).

3. Franckowiak, J.D. 1999. Coordinator=s report: Semidwarf genes. BGN 29:74-79.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Hayes, H.K., and H.V. Harlan. 1920. The inheritance of the length of internode in the rachis of the barley spike. U.S. Dept. Agr., Bull. 869. 26 pp.

6. Kivi, E.I. 1986. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:82.

BGS 62, Subjacent hood, sbk

Stock number: BGS 62

Locus name: Subjacent hood

Locus symbol: sbk

Previous nomenclature and gene symbolization:

Subjacent hood = sk (7).

Hooded awn 2 = k2 (10).

Hoods = k_r (9).

Calcaroides-a = cal-a (2, 3).

Inheritance:

Monofactorial recessive (6, 7).

Located in chromosome 2HS (6, 7, 8), distal from molecular marker CDO057 (5), probably in Bin 2H-01.

Description:

Unlike the Kap (hooded awn) mutants, the lemma appendage or its modification is situated somewhat below the top of the lemma. Lemma modifications may include a central cup-like cavity or sac in some alleles and/or pronounced lemma wings in other alleles (1, 5). The modified lemma bears a short distal awn. Only a few florets of the spike have malformations in alleles cal-a.3, -a.6, -a.7, and -a.17 and these alleles are associated with the formation of pronounced wings (5). There are no rudiments of a floral organ within the hood-like cavity (5, 6, 7). Leaf knots and leaf curling are present in some alleles (5). In the homozygous condition, the sbk1.a gene is epistatic to Kap1.a and to Lks1.a (awnless) genes (6). The Bowman backcross-derived line with the sbk1.a gene is earlier, shorter, and less vigorous than the recurrent parent.

Origin of mutant:

A spontaneous mutant identified as Tayeh 13 (OUC335) (6); an X-ray induced mutant in Bonus (PI 189763) (4).

Mutational events:

sbk1.a in Tayeh 13 (6); cal-a.1 in Bonus (NGB 114280, 114281) (3, 4); cal-a.3 (NGB 114283), -a.5 (NGB 114285) in Foma (CIho 11333); cal-a.6 (NGB 114286) in Bonus; cal-a.7 (NGB 114287), -a.8 (NGB 114288, 114289), -a.11 (NGB 114290, 114291), -a.12 (NGB 114292), -a.13 (NGB 114293) in Foma; cal-a.16 (NGB 114295), -a.17 (NGB 114296), -a.20 (NGB 114299), -a.21 (NGB 114300) in Bonus (3, 4); sbk1.b (k_r) in Montcalm (CIho 7149) (9).

Mutant used for description and seed stocks:

sbk1.a in Tayeh 13 (GSHO 267); cal-a.1 in Bonus (GSHO 286, NGB 114280, NGB 114281); sbk1.a in Bowman (PI 483237)*7 (GSHO 1874); cal‑a.1 in Bowman*3 (GSHO 2186).

References:

1. Bossinger, G., U. Lundqvist, W. Rohde, and F. Salamini. 1992. Genetics of plant development in barley. p. 989-1017. In L. Munck, K. Kirkegaard, and B. Jensen (eds.). Barley Genetics VI. Proc. Sixth Int. Barley Genet. Symp., Helsingborg, 1991. Munksgaard Int. Publ., Copenhagen.

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. 1993. Coordinator's report: Ear morphology genes. BGN 22:137‑139.

4. Lundqvist, U. (Unpublished).

5. Pozzi, C., P. Faccioli, V. Terzi, A.M. Stanca, S. Cerioli, P. Castiglioni, R. Fink, R. Capone, K.J. Müller, G. Bossinger, W. Rohde, and F. Salamini. 2000. Genetics of mutations affecting the development of a barley floral bract. Genetics 154:1335‑1346.

6. Takahashi, R., and J. Hayashi. 1966. Inheritance and linkage studies in barley. II. Assignment of several new mutant genes to their respective linkage groups by the trisomic method of analysis. Ber. Ohara Inst. landw. Biol., Okayama Univ. 13:185-198.

7. Takahashi, R., J. Yamamoto, S. Yasuda, and Y. Itano. 1953. Inheritance and linkage studies in barley. Ber. Ohara Inst. landw. Forsch. 10:29-52.

8. Tsuchiya, T., and R.J. Singh. 1973. Further information on telotrisomic analysis in barley. BGN 3:75-79.

9. Walker, G.W.R., J. Dietrich, R. Miller, and K.J. Kasha. 1963. Recent barley mutants and their linkages II. Genetic data for further mutants. Can. J. Genet. Cytol. 5:200-219.

10. Woodward, R.W. 1957. Linkages in barley. Agron. J. 49:92-94.

Prepared:

T. Tsuchiya and T.E. Haus. 1971. BGN 1:122.

Revised:

J.D. Franckowiak and U. Lundqvist. 1997. BGN 26:98.

J.D. Franckowiak and U. Lundqvist. 2002. BGN 32:83-84.

BGS 97, Accordion rachis 1, acr1

Stock number: BGS 97

Locus name: Accordion rachis 1

Locus symbol: acr1

Previous nomenclature and gene symbolization:

Lax rachis internode = ril (1).

Accordion rachis = acr (4, 5).

Inheritance:

Monofactorial recessive plus modifiers (1, 4, 5).

Located in chromosome 2HL, near the vrs1 (six-rowed spike 1) because no recombination with the Vrs1.t (deficiens) allele has been observed (2).

Description:

Rachis internodes are greatly elongated and often bent or pleaded as the spike emerges from the boot or sheath of the flag leaf (4). The line ACBV89B29 exhibits extreme elongation of rachis internodes, rachis internode length values over 7.0 mm, and occasionally trapping of the spike tip in the boot (2, 6). Elongation of the rachis internodes is associated with long outer glumes and the deficiens phenotype. Modifiers cause variable expression of the accordion trait in different genetic backgrounds. In crosses to Bowman, segregation for acr1 fits a two gene ratio better than an one gene ratio. Plants are about 3/4 normal height and the grain is thin compared to that of normal sibs (2).

Origin of mutant:

A naturally occurring deviant (4) incorporated into several genetic stocks, acr1.a in Beaverlodge stock ACBV89B29 was used to study this locus (2, 6).

Mutational events:

acr1.a in ACBV89B29 (6).

Mutant used for description and seed stocks:

acr1.a in ACBV89B29 (GSHO 1617); acr1.a in Bowman (PI 483237)*5 (GSHO 1899).

References:

1. Enns, H. 1961. Inheritance and linkage studies in barley using chromosomal interchanges and marker stocks. Ph.D. Thesis. Univ. Saskatchewan. pp. 70.

2. Franckowiak, J.D. (Unpublished).

3. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

4. Haus, T.E. 1957. Inheritance of rachis internode length and an abnormal rachis type in barley. Dissertation Abstr. 49:179-180.

5. Nilan, R.A. 1964. The cytology and genetics of barley, 1951-1962. Monogr. Suppl. 3, Res. Stud. Vol. 32, No. 1. Washington State Univ. Press, Pullman.

6. Wolfe, R.I. 1990. (Personal communications).

Prepared:

J.D. Franckowiak. 2001. BGN 32:85.

BGS 98, Early maturity 6, Eam6

Stock number: BGS 98

Locus name: Early maturity 6

Locus symbol: Eam6

Previous nomenclature and gene symbolization:

Early heading = Ea (6).

Early maturity 6 = Ea6 (4).

Inheritance:

Monofactorial dominant (6).

Located in chromosome 2HS, about 13.5 cM proximal from the vrs1 (six-rowed spike 1) locus (6); near the gsh5 (glossy sheath 5) locus based on linkage drag (1, 2); near molecular marker ABC167b in Bin 2H-08 (3, 5).

Description:

Alleles at the Eam6 locus alter the timing of floral initiation when barley is grown under long-day conditions. In temperate climates, the Eam6.h gene induces spring barley to head two to five days earlier than plants with the recessive allele (1, 3). A much stronger response to long photoperiods is associated with the Eam1 gene. Tohno-oka et al. (5) reported that Eam6 gene from Morex (CIho 15773) is effective when the photoperiod is 13 hours or longer and that the Eam1 gene from Steptoe (CIho 15229) induces early heading when the photoperiod is 14 hours or longer. In North Dakota, plants with both the Eam1 and Eam6 genes head one to two days earlier than those with only the Eam1 gene (1). The factors Eam1 and Eam6 for early heading may have been studied by Yasuda (7) and named AA@ and AB@, respectively.

Origin of mutant:

Natural occurrence in many spring, six-rowed barley, represented by the cultivar Morex (CIho 15773) (5).

Mutational events:

Eam6.h in an unknown cultivar (6); Eam6.h in Morex (3, 5).

Mutant used for description and seed stocks:

Eam6.h in Morex (CIho 15773, GSHO 2492); Eam6.h from Nordic (CIho 15216) in Bowman (PI 483237).

References:

1. Franckowiak, J.D., and G.T. Yu (Unpublished).

2. Franckowiak, J.D., and U. Lundqvist. 1997. BGS 355, Glossy sheath 5, gsh5. BGN 26:300-301.

3. Marquez-Cedillo, L.A., P.M. Hayes, A. Kleinhofs, W.G. Legge, B.G. Rossnagel, K. Sato, S.E. Ullrich, and D. M. Wesenberg. 2001. QTL analysis of agronomic traits in barley based on the doubled haploid progeny of two elite North American varieties representing different germplasm groups. Theor. Appl. Genet. 103:625-637.

4. Robertson, D.W., G.A. Wiebe, R.G. Shands, and A. Hagberg. 1965. A summary of linkage studies in cultivated barley, Hordeum species: Supplement III, 1954-1963. Crop Sci. 5:33-43.

5. Tohno-oka, T., M. Ishit, R. Kanatani, H. Takahashi, and K. Takeda. 2000. Genetic analysis of photoperiodic response of barley in different daylength conditions. p. 239-241. In S. Logue (ed.) Barley Genetics VIII. Volume III. Proc. Eighth Int. Barley Genet. Symp., Adelaide. Dept. Plant Science, Waite Campus, Adelaide University, Glen Osmond, South Australia.

6. Woodward, R.W. 1957. Linkages in barley. Agron. J. 49:28-32.

7. Yasuda, S. 1958. (Genetic analysis of the response to short photoperiod in a barley cross by means of the partitioning method.) Nogaku Kenkyu 46:54-62 [In Japanese].

Prepared:

J.D. Franckowiak and T. Konishi. 2002. BGN 32:86-87.

BGS 99, Lesser internode number 1, lin1

Stock number: BGS 99

Locus name: Lesser internode number 1

Locus symbol: lin1

Previous nomenclature and gene symbolization:

Rachis internode number = s, rin (2, 5).

Low number of rachis internodes = rin (3).

Inheritance:

Monofactorial recessive (4, 5).

Located in chromosome 2HL (5), about 15.1 cM distal from the eog (elongated outer glume) locus and about 17.1 cM proximal from the vrs1 (six-rowed spike 1) locus (4).

Description:

The mean number of rachis internodes per spike is reduced by 20 to 40%. The average internode number was 15.3 in Triple Bearded Mariout and 22.9 in Spartan (4). In some six-rowed cultivars as Morex, the reduction in rachis internodes associated with the lin1 gene is less obvious (1). Presence of the Eam1 (early maturity 1) gene in Triple Bearded Mariout (BGS 57) makes study of lin1 locus difficult in some environments; therefore, new BGS number and seed stock are recommended.

Origin of mutant:

Natural occurrence in many six-rowed barley cultivars of North African origin (1). (Tavcar=s mutant stock is no longer available.)

Mutational events:

lin1.a in Triple Bearded Mariout (CIho 2523, GSHO 29) (4).

Mutant used for description and seed stocks:

lin1.a in Morex (CIho 15773, GSHO 2492); lin1.a from Nordic (CIho 15216) in Bowman (PI 483237).

References:

1. Franckowiak, J.D. (Unpublished).

2. Freisleben, R., and I. Metzger. 1942. Genetische Studien zur Gerstenzüchtung. I. Vererbung und Koppelung der Mehltauresistenz und der Spindelgliedzahl. Z. f. Pflanzenzücht. 24:507-522.

3. Robertson, D.W., G.A. Wiebe, and F.R. Immer. 1941. A summary of linkage studies in barley. J. Am. Soc. Agron. 33:47-64.

4. Swenson, S.P., and D.G. Wells. 1944. The linkage relation of four genes in chromosome 1 of barley. J. Am. Soc. Agron. 36:429-435.

5. Tavcar, A. 1938. Vererbungsart der Spindelstufenzahl bei Bastardierungen einiger distichum x vulgare Wintergersten. Z. Indukt. Abstammungs. Vererbungsl. 75:106-123.

Prepared:

T. Tsuchiya and T.E. Haus. 1971. BGN 1:117 (BGN 14:91) as BGS 57, Reduced internode number, rin.

Revised:

T. Tsuchiya and T.E. Haus. 1984. BGN 14:91 as BGS 57, Lesser internode number, lin.

J.D. Franckowiak. 2002. BGN 32:88.

BGS 100, Slender dwarf 4, sld4

Stock number: BGS 100

Locus name: Slender dwarf 4

Locus symbol: sld4

Previous nomenclature and gene symbolization:

Slender dwarf d = sld.d (2).

Inheritance:

Monofactorial recessive (4).

Located in chromosome 2HL (5), about 22 cM distal from the vrs1 (six-rowed spike 1) locus (4).

Description:

Plants with the sld4.d gene have reduced vigor and are light green in color during early stages of growth (5). Plants are 1/2 to 2/3 of normal height. The number of spikelets per spike is about 3/4 of normal. Kernels are very thin and grain yield is very low in the Bowman backcross-derived line (1).

Origin of mutant:

A neutron induced mutant in Two-row Glacier (4). (Glacier is available as CIho 6976.)

Mutational events:

sld4.d in Two-row Glacier (80-T-5899-2-13, DWS1368) (2, 3, 4).

Mutant used for description and seed stocks:

sld4.d in Two-row Glacier (GSHO 2479); sld4.d in Bowman (PI 483237)*7 (GSHO 1880).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1999. Coordinator=s report: Semidwarf genes. BGN 29:74-79.

3. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

4. Ramage, R.T., and P. Curtis. 1981. A light green, dwarf mutant located on chromosome 2. BGN 11:37-38.

5. Ramage, R.T., and R.A. Ronstadt-Smith. 1983. Location of a light green dwarf mutant on chromosome 2. BGN 13:62-64.

Prepared:

J.D. Franckowiak. 2002. BGN 32:89.

BGS 141, Reaction to barley yellow mosaic virus 5, rym5

Stock number: BGS 141

Locus name: Reaction to barley yellow mosaic virus 5 (BaYMV)

Locus symbol: rym5

Previous nomenclature and gene symbolization:

Resistance to BaYMV = Ym (3, 5, 7).

Resistance to BaYMV 5 = ym5 (4).

Resistance to BaYMV 5 = rym5 (8).

Inheritance:

Monofactorial recessive (4).

Located in chromosome 3HL (7), approximately 2.5 cM distal from the Est1 (esterase 1) locus (4, 7), in Bin 3H-16 and flanked by molecular markers MWG838 and MWG010A at distances of 0.8 and 1.3 cM, respectively (1).

Description:

Plants with the rym5.h allele are resistant to Japanese strains I and II of BaYMV, but susceptible to Japanese strain III of BaYMV (2). In Germany, plants with rym5.h are resistant to strains BaYMV-1 and BaYMV-2 (6, 10). Although plants with rym5.h are resistant to BaMMV (barley mild mosaic virus) in Germany (6, 10), they are susceptible to the Japanese strain BaMMV-Na (6, 9).

Origin of mutant:

Natural occurrence in Mokusekko 3 (OUC627, PI 420938) (4).

Mutational events:

rym5.h in Mokusekko 3 (4).

Mutant used for description and seed stocks:

rym5.h in Misato Golden (OUJ848) from Mokusekko 3 (4).

References:

1. Graner, A., S. Streng, A. Kellermann, A. Schiemann, E. Bauer, R. Waugh, B. Pello, and F. Ordon. 1999. Molecular mapping and genetic fine-structure of the rym5 locus encoding resistance to different strains of the barley yellow mosaic virus complex. Theor. Appl. Genet. 98:285-290.

2. Kashiwazaki, S., K. Ogawa, T. Usugi, T. Omura, and T. Tsuchizaki. 1989. Characterization of several strains of barley yellow mosaic virus. Ann. Phytopath. Soc. Japan 55:16-25.

3. Kawada, N., and M. Tsuru. 1987. Genetics and breeding of resistance to barley yellow mosaic virus. p. 651-657. In S. Yasuda and T. Konishi (eds.) Barley Genetics V. Proc. Fifth Int. Barley Genet. Symp., Okayama, Japan. 1986. Maruzen Co., Ltd., Okayama Branch, Okayama, Japan.

4. Konishi, T., T. Ban, Y. Iida, and R. Yoshimi. 1986. Genetic analysis of disease resistance to all strains of BaYMV in a Chinese barley landrace, Mokusekko 3. Theor. Appl. Genet. 94:871-877.

5. Konishi, T., and R. Kaiser. 1991. Genetic difference in barley yellow mosaic virus resistance between Mokusekko 3 and Misato Golden. Japan. J. Breed. 41:499-505.

6. Konishi, T. and R. Kaiser-Alexnat. 2000. Reaction of barley accessions to BaYMV and BaMMV in Japan, compared with data in Germany. BGN 30:58-61.

7. Konishi, T., N. Kawada, H. Yoshida, and K. Soutome. 1989. Linkage relationships between two loci for the barley yellow mosaic resistance of Mokusekko 3 and esterase enzymes in barley (Hordeum vulgare L.). Japan. J. Breed. 39:423-430.

8. Miyazaki, C., E. Osanai, K. Saeki, K. Ito, T. Konishi, K. Sato, and A. Saito. 2001. Mapping of quantitative trait loci conferring resistance to barley yellow mosaic virus in a Chinese barley landrace Mokusekko 3. Breeding Science 51:171-177.

9. Nomura, K., S. Kashiwazaki, H. Hibino, T. Inoue, E. Nakata, Y. Tsuzaki, and S. Okuyama. 1996. Biological and serological properties of strains of barley mild mosaic virus. J. Phytopath. 144:103-197.

10. Orden, F., R. Götz, and W. Friedt. 1993. Genetic stocks resistant to barley mosaic viruses (BaMMV, BaYMV, BaYMV-2) in Germany. BGN 22:46-50.

Prepared:

T. Konishi and J.D. Franckowiak. 2002. BGN 32:90-91.

BGS 142, Brachytic 8, brh8

Stock number: BGS 142

Locus name: Brachytic 8

Locus symbol: brh8

Previous nomenclature and gene symbolization:

Brachytic-ad = brh.ad (2).

Inheritance:

Monofactorial recessive (2, 4).

Located in chromosome 3HS, based on linkage drag with the btr1 (non-brittle rachis 1) locus (3).

Description:

Plants are 3/4 to 5/6 of normal height and awns are 2/3 to 3/4 of normal length. The seedling leaf of brh8 plants is shorter and wider than those of normal sibs and the leaf blades are slightly wider. The grain of brh8 plants is shorter and plumper than that of normal sibs. Heading is slightly delayed and spikes are slightly compacted, but grain yield is nearly normal (1).

Origin of mutant:

Probably a sodium azide induced mutant in Birgitta (NSGC 1870) (5).

Mutational events:

brh8.ad in Birgitta (17:16:1, DWS1008) (4, 5).

Mutant used for description and seed stocks:

brh8.ad in Birgitta (GSHO 1671); brh8.ad in Bowman (PI 483237)*7 (GSHO 1944).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. BGN 24:56-59.

3. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Lehmann, L. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:92.

BGS 143, Shrunken endosperm xenia 8, sex8

Stock number: BGS 143

Locus name: Shrunken endosperm xenia 8

Locus symbol: sex8

Previous nomenclature and gene symbolization:

Shrunken endosperm xenia-j = sex.j (2).

Inheritance:

Monofactorial recessive (2).

Located in chromosome 3HS, based on linkage drag with the btr1 (non-brittle rachis 1) locus (2).

Description:

After the hard dough stage, the grain develops a slight depression in the dorsal or lemma side. In plants heterozygous for sex8, a xenia pattern of expression is observed. Seeds with a small depression in the dorsal side are homozygous for sex8.

Origin of mutant:

A spontaneous mutant in a selection from cross I89-633 (lax-169/3*Bowman) (1).

Mutational events:

sex8.j in I89-633-1 (GSHO 2471) (1, 2).

Mutant used for description and seed stocks:

sex8.j in I89-633-1 (GSHO 2471); sex8.j in Bowman (PI 483237)*7 (GSHO 1945).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

Prepared:

J.D. Franckowiak. 2002. BGN 32:93.

BGS 144, Slender dwarf 5, sld5

Stock number: BGS 144

Locus name: Slender dwarf 5

Locus symbol: sld5

Previous nomenclature and gene symbolization:

Indian Dwarf (1, 4).

Slender dwarf-h = sld.h (2).

Inheritance:

Monofactorial recessive (1).

Located in chromosome 3HS, based on linkage drag with the btr1 (non-brittle rachis 1) locus (2).

Description:

Plants with the sld5.h gene show reduced vigor and have thin grain. Plants are about 2/3 normal height in the XV 2334-6R line and about 1/2 normal in Indian Dwarf accession (1, 4). Seedlings with the sld5.h gene are insensitive to treatment with gibberellic acid (1). The second factor for reduced height in Indian Dwarf may be the Eam5.x (early maturity 5, BGS 348) mutant.

Origin of mutant:

A spontaneous mutant identified as Indian Dwarf (CIho 13994) (1).

Mutational events:

sld5.h in XV2334-6R (DWS1238) from Indian Dwarf (1, 3, 4); Apam Dwarf likely has an allele at the sld5 locus (4).

Mutant used for description and seed stocks:

sld5.h in XV2334-6R (GSHO 2483), sld5.h in Bowman (PI 483237)*7 (GSHO 1940).

References:

1.Boulger, M.C., R.G. Sears, and W.E. Kronstad. 1982. An investigation of the association between dwarfing sources and gibberellic acid response in barley. p. 550-553. In M.J.C. Asher, R.P. Ellis, A.M. Hayter, and R.N.H. Whitehouse (eds.) Barley Genetics IV. Proc. Fourth Int. Barley Genet. Symp., Edinburgh. Edinburgh Univ. Press, Edinburgh.

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

3. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

4. Sears, R.G., W.E. Kronstad, and R.J. Metzger. 1981. Inheritance of dwarf and semidwarf plant height in barley. Crop Sci. 21:828-831.

Prepared:

J.D. Franckowiak. 2002. BGN 32:94.

BGS 146, Calcaroides-d, cal-d

Stock number: BGS 146

Locus name: Calcaroides-d

Locus symbol: cal-d

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (2, 3).

Located in chromosome 3H, near the centromere and near molecular marker CDO684 (4), which is in Bin 3H-06.

Description:

At the tip of the lemma proper, in a position corresponding to the transition between lemma and awn, cal-d mutants bear a well‑organized ectopic structure, the sac (1, 4). Only the allele cal-d.22 does not produce pronounced lemma wings. The cal-d mutants bear a short distal awn (4). In contrast to the Kap (hooded lemma) phenotype, the sac does not develop into an epiphyllous flower. The cal-d alleles are associated with leaf curling also (4).

Origin of mutant:

An X-ray induced mutant in Foma (CIho 11333) (2, 3).

Mutational events:

cal-d.4 (GSHO 1698, NGB 114284) in Foma (3); cal-d.14 (NGB 119831) in Kristina (NGB 1500), -d.18 (NGB 114297), ‑d.22 (NGB 114301, 114302) in Bonus (PI 189763) (3).

Mutant used for description and seed stocks:

cal-d.4 in Foma (GSHO 1698, NGB 114284); cal-d.4 in Bowman (PI 483237)*6 (GSHO 1875).

References:

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. 1993 Coordinator's report: Ear morphology genes. BGN 22:137‑139.

4. Pozzi, C., P. Faccioli, V. Terzi, A.M. Stanca, S. Cerioli, P. Castiglioni, R. Fink, R. Capone, K.J. Müller, G. Bossinger, W. Rohde, and F. Salamini. 2000. Genetics of mutations affecting the development of a barley floral bract. Genetics 154:1335‑1346.

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:95.

BGS 167, Reaction to barley yellow mosaic virus 1, rym1

Stock number: BGS 167

Locus name: Reaction to barley yellow mosaic virus 1 (BaYMV)

Locus symbol: rym1

Previous nomenclature and gene symbolization:

Resistance to BaYMV = Ym (8).

Inheritance:

Monofactorial recessive (3, 5).

Located in chromosome 4HL (3, 5), approximately 9.7 cM distal from the glf3 (glossy leaf 3) locus (3), and closely linked to molecular marker MWG2134 (5), which is in Bin 4H-06.

Description:

Plants with the rym1.a gene show less yellowing and stunting than susceptible plants when grown in fields that are infested with BaYMV (8). Mokusekko 3 is resistant to all strains of BaYMV and BaMMV (barley mild mosaic virus) in Japan (1, 6) and Germany (7), and possesses at least two recessive genes, rym1.a and rym5.h (3, 5). The rym1.a gene was separated from the rym5.h gene in the progeny from a cross between Mokusekko 3 and Colsess (a susceptible genetic stock) using isozyme assisted selection (3). The line MK501-234 carries only the rym1.a gene and is resistant to all strains of BaYMV in Japan (2, 3).

Origin of mutant:

Natural occurrence in Mokusekko 3 (OUC627, PI 420938) (8).

Mutational events:

rym1.a in Mokusekko 3 (8).

Mutant used for description and seed stocks:

rym1.a in Mokusekko 3 (OUC627) (3); rym1.a in MC501-234, which has only the rym1.a gene for resistance to BaYMV (3).

References:

1. Kashiwazaki, S., K. Ogawa, T. Usugi, T. Omura, and T. Tsuchizaki. 1989. Characterization of several strains of barley yellow mosaic virus. Ann. Phytopath. Soc. Japan 55:16-25.

2. Konishi. (Unpublished).

3. Konishi, T., T. Ban, Y. Iida, and R. Yoshimi. 1997. Genetic analysis of disease resistance to all strains of BaYMV in a Chinese barley landrace, Mokusekko 3. Theor. Appl. Genet. 94:871-877.

4. Konishi, T., and R. Kaiser. 1991. Genetic difference in barley yellow mosaic virus resistance between Mokusekko 3 and Misato Golden. Japan. J. Breed. 41:499-505.

5. Miyazaki, C., E. Osanai, K. Saeki, K. Ito, T. Konishi, K. Sato, and A. Saito. 2001. Mapping of quantitative trait loci conferring resistance to barley yellow mosaic virus in a Chinese barley landrace Mokusekko 3. Breeding Science 51:171-177.

6. Nomura, K., S. Kashiwazaki, H. Hibino, T. Inoue, E. Nakata, Y. Tsuzaki, and S. Okuyama. 1996. Biological and serological properties of strains of barley mild mosaic virus. J. Phytopath. 144:103-197.

7. Orden, F., R. Götz, and W. Friedt. 1993. Genetic stocks resistant to barley mosaic viruses (BaMMV, BaYMV, BaYMV-2) in Germany. BGN 22:46-50.

8. Takahashi, R., I. Hayashi, T. Inouye, I. Moriya, and C. Hirao. 1973. Studies on resistance to yellow mosaic disease in barley. I. Tests for varietal reactions and genetic analysis of resistance to the disease. Ber. Ohara Inst. landw. Biol., Okayama Univ. 16:1-17.

Prepared:

R.G. Timian. 1976. BGN 6:125.

Revised:

J.D. Franckowiak and T. Konishi. 1996. BGN 26:193.

T. Konishi and J.D. Franckowiak. 2002. BGN 32:96-97.

BGS 183, Yellow node 1, Ynd1

Stock number: BGS 183

Locus name: Yellow node 1

Locus symbol: Ynd1

Previous nomenclature and gene symbolization:

Yellow node = Yn (R.F. Eslick=s collection notes) (1).

Inheritance:

Monofactorial incomplete dominant (1).

Located in chromosome 4HS, based on incomplete data from the Harrington/Morex mapping population (2) and linkage drag with the int-c (intermedium spike -c) locus (1).

Description:

Nodes of the culm appear to lack a coating of surface waxes in plants homozygous for the Ynd1.a gene. In heterozygotes, surface waxes may be observed on the upper half of the node. This trait is easier to observe in greenhouse grown plants where surface waxes are not rubbed off by wind caused leaf movements. The Ynd1.a allele is present in many six-rowed cultivars of Oriental origin (1). The glossy node trait is seldom found in two-rowed lines selected from two- by six-rowed crosses because the Ynd1.a allele is closely linked to the Int-c.a allele, which increases the size of lateral spikelets (1, 2).

Origin of mutant:

Naturally occurring in many six-rowed barley cultivars (1).

Mutational events:

Ynd1.a in a stock from R.F. Eslick=s collection at Montana State University, Bozeman (GSHO 1607) (1).

Mutant used for description and seed stocks:

Ynd1.a in Morex (CIho 15773, GSHO 2492); Ynd1.a from Sen >S= (GSHO 1605) in Bowman (PI 483237)*6 (GSHO 2363).

References:

1. Franckowiak, J.D. (Unpublished).

2. Kleinhofs, A., and J.D. Franckowiak. (Unpublished).

Prepared:

J.D. Franckowiak. 2002. BGN 32:98.

BGS 184, Zeocriton 3, Zeo3

Stock number: BGS 184\

Locus name: Zeocriton 3

Locus symbol: Zeo3

Previous nomenclature and gene symbolization:

Semidwarf mutant = Mo1 (5).

Zeocriton h = Zeo.h (2).

Inheritance:

Monofactorial dominant (2).

Location in chromosome 4HS, based on linkage drag with the int-c (intermedium spike-c) locus (2).

Description:

Spikes have compact appearance and are about 3/4 normal length because rachis internodes are shorter than those of normal sibs, 3.3 vs. 4.1 mm. The spike remains strap-shaped because all rachis internodes are about the same length. Plants are about 10 cm shorter than normal sibs (1).

Origin of mutant:

A sodium azide induced mutant in Morex (CIho 15773) (5).

Mutational events:

Zeo3.h in Morex (Wa11094-81, DWS1259) (3).

Mutant used for description and seed stocks:

Zeo3.h in Morex (GSHO 1611); Zeo3.h in Bowman (PI 483237)*7 (GSHO 1999).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

3. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

4. Nedel, J.L., S.E. Ullrich, J.A. Clancy, and W.L. Pan. 1993. Barley semidwarf and standard isotype yield and malting quality response to nitrogen. Crop Sci. 33:258-263.

5. Ullrich, S.E., and Aydin, A. 1988. Mutation breeding for semi-dwarfism in barley. p. 135-144. In Semi-dwarf cereal mutants and their use in cross-breeding III. IAEA-TECDOC-455. IAEA, Vienna.

Prepared:

J.D. Franckowiak. 2002. BGN 32:99.

BGS 185, Brachytic 5, brh5

Stock number: BGS 185

Locus name: Brachytic 5

Locus symbol: brh5

Previous nomenclature and gene symbolization:

Brachytic-m = brh.m (2).

Inheritance:

Monofactorial recessive (2, 4).

Located in chromosome 4HS, based on linkage drag with the int-c (intermedium spike-c) locus (3).

Description:

Plants are about 3/4 normal height and awns are about 3/4 of normal length. Seedling leaves of brh5 plants are relatively short. The grain of brh5 plants is globose shaped, shorter and plumper than that of normal sibs. Plants lodge easily and grain yield is reduced (1).

Origin of mutant:

Probably a sodium azide induced mutant in Birgitta (NSGC 1870) (5).

Mutational events:

brh5.m in Birgitta (17:18:2, DWS1010) (4, 5).

Mutant used for description and seed stocks:

brh5.m in Birgitta (GSHO 1678); brh5.m in Bowman (PI 483237)*7 (GSHO 2001).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. BGN 24:56-59.

3. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Lehmann, L. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:100.

BGS 186, Slender dwarf 3, sld3

Stock number: BGS 186

Locus name: Slender dwarf 3

Locus symbol: sld3

Previous nomenclature and gene symbolization:

Anthocyanin-free = ant-567 (5).

Proanthocyanidin-free 17.567 = ant17.567 (4).

Slender dwarf e = sld.e (3).

Inheritance:

Monofactorial recessive (1).

Located in chromosome 4HS, based on linkage drag with the int-c (intermedium spike-c) locus (2).

Description:

Plants show reduced vigor and are about 3/4 normal height. The number of spikelets per spike is lower than that of normal sibs and the grain is slightly smaller. Rachis internodes are slightly longer. The mutant gene sld3.e was isolated as a second mutant in the stock ant17.567 (proanthocyanidin-free 17) (1).

Origin of mutant:

A sodium azide induced mutant isolated with ant-567 in Manker (CIho 15549) (5).

Mutational events:

sld3.e in ant17.567 (DWS1050) (1).

Mutant used for description and seed stocks:

sld3.e in Bowman/ant17.567 (GSHO 2480); sld3.e in Bowman (PI 483237)*7 (GSHO 1998).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

3. Franckowiak, J.D. 1999. Coordinator=s report: Semidwarf genes. BGN 29:74-79.

4. Jende-Strid, B. 1988. Coordinator's report: Anthocyanin genes. Stock list of ant mutants kept at the Carlsberg Laboratory. BGN 18:74-79.

5. Ullrich, S.E. 1983. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:101.

BGS 234, Multiovary 3, mov3

Stock number: BGS 234

Locus name: Multiovary 3

Locus symbol: mov3

Previous nomenclature and gene symbolization:

Multiovary = mo-a (2).

Inheritance:

Monofactorial recessive (2).

Located in chromosome 1H [5], based on linkage drag with the Mla (reaction to Erysiphe graminis a) locus (2).

Description:

Plants with the mov3.h gene have stamens converted into pistils. Stamen conversion ranges from a few stigma hairs at the top of one anther to three normal-looking pistils. Since most supernumerary pistils are none functional, only one seed develops in each spikelet. In rare cases, the extra pistils form seeds having a very irregular shape and little endosperm. Since stamens with a few stigma hairs can shed pollen, about 17 percent of florets set seed under field conditions. Compared with other multiovary mutants (3, 4), plants with the mov3.h gene have normal or unconverted lodicules (2).

Origin of mutant:

An ethyl methanesulfonate induced mutant in Akashinriki (OUJ659) (2).

Mutational events:

mov3.h in Akashinriki (OUM213) (2).

Mutant used for description and seed stocks:

mov3.h in Akashinriki (OUM213) (2).

Notes:

Tazhin mapped his mo5 mutant very close to the nud (naked caryopsis) locus (5). The two multiovary mutants studied by J. Soule, mo6b and mo7a, have been mapped to chromosomes 3HS and 7H, respectively (1). Since both mo5 and mo7a are about 2 cM from the nud (naked caryopsis) locus, they are likely alleles. Thus, the third locus associated with multiovary trait is assigned the code mov3 and the mutant allele at this locus is assigned the symbol mov3.h as the eighth multiovary mutant reported.

References:

1. Kleinhofs, A. 1999. Coordinator=s report: Integrating barley molecular and morphological/physiological marker maps. BGN 29:58-59.

2. Konishi, T. 1969. An EMS-induced multi-ovary mutant in barley. Barley Newsl. 12:56-57.

3. Soule, J., I. Skodova, D. Kudrna, A. Kilian, and A. Kleinhofs. 1995. Molecular and genetic characterization of barley flower development mutants. BGN 25:76-80.

4. Tazhin, O.T. 1980. The linkage of the genes mo5 and n in barley. BGN 10:69-72.

5. Tazhin, O.T. 1982. Value of crossing-over between linked genes mo5 and n in barley. BGN 12:18-21.

Prepared:

T. Konishi and J.D. Franckowiak. 2002. BGN 32:102.

BGS 235, Leafy lemma, lel1

Stock number: BGS 235

Locus name: Leafy lemma 1

Locus symbol: lel1

Previous nomenclature and gene symbolization:

Leafy lemma = lel (1).

Inheritance:

Monofactorial recessive, but a second gene lel2 (probably lks2) is required for expression of leafy lemma phenotype (2).

Located in chromosome 1HL [5L], about 6.1 cM distal from molecular marker MWG733 in Bin 1H-12 (2).

Description:

The overall shape of the leafy lemma is similar to that of the typical grass leaf. The leafy lemma has a basal zone that is wider and more elongated, a transition zone, and a distal domain similar in shape to a leaf blade (1, 2). In all crosses analyzed, F₂ lel plants always had awnless lemmas, the caryopsis was longer than normal and was partially naked, there was a tendency for the rachilla to bear more than one floret, and rachis internodes were elongated (2).

Origin of mutant:

A spontaneous mutant isolated at the Istituto Sperimentale per la Cerealicoltura (Fiorenzuola, Italy) in a plot of a recessive mutant for short awn, the lks2 (short awn 2) line from the Small Grains Germplasm Research Facility (USDA-ARS), Aberdeen, Idaho (1, 2). The lks2 gene is required for full expression of the leafy lemma phenotype (2).

Mutational events:

lel1.a in G7118 (1, 2).

Mutant used for description and seed stocks:

lel1.a in G7118 (GSHO 1780); lel1.a in Bowman (PI 483237)*3 (GSHO 2279).

References:

2. Pozzi, C., P. Faccioli, V. Terzi, A.M. Stanca, S. Cerioli, P. Castiglioni, R. Fink, R. Capone, K.J. Müller, G. Bossinger, W. Rohde, and F. Salamini. 2000. Genetics of mutations affecting the development of a barley floral bract. Genetics 154:1335‑1346.

Prepared:

J.D. Franckowiak. 2002 BGN 32:103.

BGS 344, Variegated 2, var2

Stock number: BGS 344

Locus name: Variegated 2

Locus symbol: var2

Previous nomenclature and gene symbolization:

Variegated = va2 (2, 3).

Inheritance:

Monofactorial recessive (3).

Located in chromosome 5HL [7L], over 29.8 cM from the srh (short rachilla hair) locus (2).

Description:

Vertical white streaks of variable width and number are observed in leaf blades. white streaks are observed as leaves of new tiller emerge. The streaks often persist until maturity and are similar to those associated with the wst7 (white streak 7) mutant. Expression of var2 is variable from plant to plant and can be poor in certain genetic and climatic environments (1).

Origin of mutant:

Probably an X-ray induced mutant in Montcalm (CIho 7149) (3). (The stock line was obtained from the R.F. Eslick collection of barley mutants held at Montana State University.)

Mutational events:

var2.b in Montcalm (Mont. var2) (2).

Mutant used for description and seed stocks:

var2.b in Montcalm (GSHO 2496), var2.b in Bowman (PI 483237)*2 (GSHO 2362).

References:

1. Franckowiak, J.D. (Unpublished).

2. Walker, G.W.R., J. Dietrich, R. Miller, and K.J. Kasha. 1963. Recent barley mutants and their linkages II. Genetic data for further mutants. Can. J. Genet. Cytol. 5:200-219.

3. Walker, G.W., K. Kasha, and R.A. Miller. 1958. Recombination studies in barley. Proc. Genet. Soc. Can. 3:41-43.

Prepared:

J.D. Franckowiak. 2002. BGN 32:104.

BGS 345, Reaction to barley yellow mosaic virus 3, rym3

Stock number: BGS 345

Locus name: Reaction to barley yellow mosaic virus 3 (BaYMV)

Locus symbol: rym3

Previous nomenclature and gene symbolization:

Resistance to BaYMV 3 = ym3 (6).

Inheritance:

Monofactorial recessive (6, 7).

Located in chromosome 5HS [7S], near or in Bin 5H-04 and flanked by molecular markers MWG028 and ABG705A at distances of 7.2 and 11.7 cM, respectively (5).

Description:

Plants with the rym3.c gene show less yellowing and stunting than susceptible plants when grown in fields that are infested with BaYMV (7). Plants with rym3.c are susceptible to BaMMV (barley mild mosaic virus) in Germany (1, 4) and Japan (3).

Origin of mutant:

A gamma-ray induced mutant (Ea 52, OUJ555) in Chikurin Ibaraki (OUM297) (7), natural occurrence in Oriental barley cultivars (2).

Mutational events:

rym3.c in Chikurin Ibaraki (Ea 52, OUM297) (6, 7); rym3.d in Haganemugi (OUJ108, PI 315852), rym3.e in Chosen (PI 83794), rym3.f in Komeirazu (OUJ724, CIho 10957), rym3.g in Baitori (OUJ371, PI 155098) (2).

Mutant used for description and seed stocks:

rym3.c in Ea 52 (OUJ555), rym3.d in Ishuku Shirazu (OUJ546) (2).

References:

1. Götz, R., F. Ordon, and W. Friedt. 1991. Resistance to the Abarley yellow mosaic virus complex@ and genetic diversity of BaMMV-resistance. p. 609-614. In L. Munck, K. Kirkegaard, and B. Jensen (eds.). Barley Genet. VI, Vol. I. Proc. Sixth Int. Barley Genet. Symp., Helsingborg, Sweden, 1991. Munksgaard International Publishers Ltd., Copenhagen.

2. Kawada, N., and M. Tsuru. 1987. Genetics and breeding of resistance to barley yellow mosaic virus. p. 651-657. In S. Yasuda and T. Konishi (eds.) Barley Genetics V. Proc. Fifth Int. Barley Genet. Symp., Okayama, Japan. 1986. Maruzen Co., Ltd., Okayama Branch, Okayama.

3. Nomura, K., S. Kashiwazaki, H. Hibino, T. Inoue, E. Nakata, Y. Tsuzaki, and S. Okuyama. 1996. Biological and serological properties of strains of barley mild mosaic virus. J. Phytopath. 144:103-197.

4. Orden, F., R. Götz, and W. Friedt. 1993. Genetic stocks resistant to barley mosaic viruses (BaMMV, BaYMV, BaYMV-2) in Germany. BGN 22:46-50.

5. Saeki, K., C. Miyazaki, N. Hirota, A. Saito, K. Ito, and T. Konishi. 1999. RFLP mapping of BaYMV resistance gene rym3 in barley (Hordeum vulgare). Theor. Appl. Genet. 99:727-732.

6. Ukai, Y. 1984. Genetic analysis of a mutant resistant to barley yellow mosaic virus. BGN 14:31-33.

7. Ukai, Y., and A. Yamashita. 1980. Induced mutation for resistance to yellow mosaic virus. Japan. J. Breed. 30:125-130.

Prepared:

T. Konishi and J.D. Franckowiak. 2002. BGN 32:105-106.

BGS 346, Yellow streak 5, yst5

Stock number: BGS 346

Locus name: Yellow streak 5

Locus symbol: yst5

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (1).

Located in chromosome 5HL [7L], based on linkage drag with the Raw1 (smooth awn 1) locus (1).

Description:

Beginning with the second leaf, emerging leaf blades are very pale yellow-green in color. As the leaf blade matures, fine vertical green streaks develop. More greening of the leaf blade occurs along the midrib than near the margins. This pattern of greenish streaks in a yellow background persists until the tiller heads, then leaf blades gradually develop a normal green in color. The yst5 plants are slightly shorter than normal sibs, spikes are slightly more lax, grain is thinner, and seed yields are about 1/2 normal (1).

Origin of mutant:

A spontaneous mutant isolated from a Bowman/ant10.30 cross (1).

Mutational events:

yst5.e in Bowman/ant10.30 (1).

Mutant used for description and seed stocks:

yst5.e in Bowman/ant10.30 (GSHO 2501); yst5.e in Bowman (PI 483237)*4 (GSHO 2366).

References:

1. Franckowiak, J.D. (Unpublished).

Prepared:

J.D. Franckowiak. 2002. BGN 32:107.

BGS 347, Many noded dwarf 4, mnd4

Stock number: BGS 347

Locus name: Many noded dwarf 4

Locus symbol: mnd4

Previous nomenclature and gene symbolization:

Many noded dwarf 4 = m4 (2).

Many noded dwarf 4 = mnd4 (3).

Inheritance:

Monofactorial recessive (2, 5).

Located in chromosome 5HL [7], based on close linkage to the Raw1 (smooth awn 1) locus in the Bowman backcross-derived line (2).

Description:

Plants with the mnd4.e gene have 7 to 8 elongated internodes per tiller and are about 3/4 normal height. The number of tillers per plant is increased. Spikes have 2/3 to 3/4 the normal number of rachis internodes. Awn length is slightly reduced and grain is small and thin compared to that of normal sibs (1).

Origin of mutant:

An ethyl methanesulfonate induced mutant in Akashinriki (OUJ659, PI 467400) (5).

Mutational events:

mnd4.e in Akashinriki (OUM168, DWS1048) (2, 4).

Mutant used for description and seed stocks:

mnd4.e in Akashinriki (GSHO 1798); mnd4.e in Bowman (PI 483237)*7 (GSHO 2135).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

3. Franckowiak, J.D. 1999. Coordinator=s report: Semidwarf genes. BGN 29:74-79.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Konishi, T. 1986. (Personal communications).

Prepared:

J.D. Franckowiak and T. Konishi. 2002. BGN 32:108.

BGS 348, Early maturity 5, Eam5

Stock number: BGS 348

Locus name: Early maturity 5

Locus symbol: Eam5

Previous nomenclature and gene symbolization:

Early maturity = Ea (5, 8).

Early maturity 3 = Ea3 (2, 3).

Early maturity 5 = Ea5 (4).

Early maturity 8 = Ea8 (6).

Inheritance:

Monofactorial dominant (1).

Located in chromosome 5HL [7L] (2), very close to the Raw1 (smooth awn 1) locus (1, 8).

Description:

Plants with the Eam5 gene head 3 to 10 days earlier than normal sibs under short-day conditions. Early heading is commonly associated a shorter stature compared to normal sibs. Peduncles and rachis internodes are slightly shortened. Interactions with other genes conditioning photoperiod response have been observed (1). The Eam5 gene may be the dominant factor for earliness identified in Indian Dwarf (7).

Origin of mutant:

Natural occurrence in Indian cultivars (2, 3) and isolated from ICARDA/CIMMYT selection CMB85-533-H-1Y-1B-0Y-5B (Higuerilla*2/Gobernadora) (1).

Mutational events:

Eam5.x in CMB85-533 (1); Eam5.x probably in Indian Dwarf (CIho 13994) (1, 7).

Mutant used for description and seed stocks:

Eam5.x in CMB85-533; Eam5.x in Bowman (PI 483237)*4.

References:

1. Franckowiak, J.D. (Unpublished).

2. Jain, K.B.L. 1961. Genetic studies in barley. III. Linkage relations of some plant characters. Indian J. Genet. Plant Breed. 21:23-33.

3. Murty, G.S., and K.B.L. Jain. 1960. Genetic studies in barley. II. Inheritance of fertility of lateral florets and certain other characters. J. Indian Botan. Soc. 39:281-308.

4. Nilan, R.A. 1964. The cytology and genetics of barley, 1951-1962. Monogr. Suppl. 3, Res. Stud. Vol. 32, No. 1. Washington State Univ. Press, Pullman.

5. Robertson, D.W., G.A. Wiebe, and F.R. Immer. 1941. A summary of linkage studies in barley. J. Am. Soc. Agron. 33:47-64.

6. Robertson, D.W., G.A. Wiebe, R.G. Shands, and A. Hagberg. 1965. A summary of linkage studies in cultivated barley, Hordeum species: Supplement III, 1954-1963. Crop Sci. 5:33-43.

7. Sears, R.G., W.E. Kronstad, and R.J. Metzger. 1981. Inheritance of dwarf and semidwarf plant height in barley. Crop Sci. 21:828-833.

8. Wexelsen, H. 1934. Quantitative inheritance and linkage in barley. Hereditas 18:307-348.

Prepared: J.D. Franckowiak. 2002. BGN 32:109.

BGS 349, Brachytic 4, brh4

Stock number: BGS 349

Locus name: Brachytic 4

Locus symbol: brh4

Previous nomenclature and gene symbolization:

Brachytic-j = brh.j (2, 4).

Inheritance:

Monofactorial recessive (2, 4).

Located in chromosome 5HL [7L], based on linkage drag with the Raw1 (smooth awn 1) locus (3).

Description:

The seedling leaf of brh4 plants is short and wide. Plants are 3/4 to 5/6 normal height and leaf blades are wider than those of normal sibs. Awns are about 3/4 of normal length, rachis internodes are slightly shortened, and the number fertile spikelets per spike is increased slightly compared to that of normal sibs. The grain from brh4 plants is short and plump, globose shaped, compared to that normal sibs (1).

Origin of mutant:

Probably a sodium azide induced mutant in Birgitta (NSGC 1870) (5).

Mutational events:

brh4.j in Birgitta (17:13:6, DWS1005) (4, 5).

Mutant used for description and seed stocks:

brh4.j in Birgitta (GSHO 1675); brh4.j in Bowman (PI 483237)*7 (GSHO 2130).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. BGN 24:56-59.

3. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Lehmann, L. 1985. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:110.

BGS 350, Brachytic 6, brh6

Stock number: BGS 350

Locus name: Brachytic 6

Locus symbol: brh6

Previous nomenclature and gene symbolization:

Brachytic-s = brh.s (2).

Inheritance:

Monofactorial recessive (2, 4).

Located in chromosome 5HL [7L], based on linkage drag with the Raw1 (smooth awn 1) locus (3).

Description:

Plants are 2/3 to 3/4 normal height and awns are about 2/3 normal length. The seedling leaf of brh6 plants is shorter than that of normal sibs (1, 5). Leaf blades are shorter and wider and the grain is slightly smaller. Although grain yield of the near-isogenic line for brh6 was lower than those of tall Akashinriki, brh6 is considered a high yielding dwarf (5). Plant vigor is reduced in the Bowman backcross-derived line (1).

Origin of mutant:

An ethyl methanesulfonate induced mutant in Akashinriki (OUJ659, PI 467400) (5, 6).

Mutational events:

brh6.s in Akashinriki (OUM135, DWS1037), brh6.r in Akashinriki (OUM133, dw-h DWS1036, GSHO 1683) (2, 4, 5).

Mutant used for description and seed stocks:

brh6.s in Akashinriki (GSHO 1684); brh6.s in Bowman (PI 483237)*7 (GSHO 2131).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. BGN 24:56-59.

3. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

4. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

5. Konishi, T. 1976. The nature and characteristics of EMS-induced dwarf mutants in barley. p. 181-189. In H. Gaul (ed.). Barley Genetics III. Proc. Third Int. Barley Genet. Symp., Garching, 1975. Verlag Karl Thiemig, München.

6. Konishi, T. 1977. Effects of induced dwarf genes on agronomic characters in barley. p. 21-38. In Use of dwarf mutations. Gamma-Field Symposium No. 16.

Prepared:

J.D. Franckowiak and T. Konishi. 2002. BGN 32:111.

BGS 611, Necrotic leaf spot 6, Nec6

Stock number: BGS 611

Locus name: Necrotic leaf spot 6

Locus symbol: Nec6

Previous nomenclature and gene symbolization:

Spotted = Sp (2).

Inheritance:

Monofactorial dominant (2).

Location is unknown.

Description:

Numerous dark-brown, oval to elongated spots form on all foliar parts of plants homozygous or heterozygous for the Nec6 gene. The spots are pinpoint in size when they first appear and gradually enlarge to a diameter of 10 to 15 mm. The spots appear on the first leaf when seedlings are at a three to four-leaf stage and on succeeding leaf when the leaf blade has partially expanded. The spots may cover 20 to 30% of the leaf blade area, but areas adjacent to the spots remain green. Average grain yield reduction in spotted isogenic lines was 13.6% (2). Plant height and kernel plumpness are slightly reduced in the Bowman backcross-derived line (1).

Origin of mutant:

A spontaneous mutant in Awnless Atlas (CIho 10965) (2).

Mutational events:

Nec6.h in Awnless Atlas (2).

Mutant used for description and seed stocks:

Nec6.h in Spotted Quarter-awned Atlas (GSHO 2424); Nec6.h in Bowman (PI 483237)*5.

References:

1. Franckowiak, J.D. (Unpublished).

2. Schaller, C.W., and C.O. Qualset. 1975. Isogenic analysis of productivity in barley: Interaction of genes affecting awn length and leaf-spotting. Crop. Sci. 13:378-382.

Prepared:

J.D. Franckowiak. 2002. BGN 32:112.

BGS 612, Gigas 2, gig2

Stock number: BGS 612

Locus name: Gigas 2

Locus symbol: gig2

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (1, 2).

Location is unknown.

Description:

Plants with the gig2 gene are tall and robust. Most plant parts are larger than those of normal sibs and spikes have 4 to 8 more fertile spikelets. In the greenhouse, heading is delayed by two to three weeks and plants are nearly twice as tall as normal sibs. Under field conditions, plants are tall and late and lodge easily. If planted late in North Dakota, gig2 plants may remain vegetative until the end of the growing season (1).

Origin of mutant:

A spontaneous mutant in the breeding line ND12463 (ND7556/4/ND5835// ND4064/ND2199/3/Bowman/5/ND8879) (1).

Mutational events:

gig2.b in ND12463 (ND12463-1, DWS1372) (2).

Mutant used for description and seed stocks:

gig2.b in ND12463 (GSHO 1750); gig2.b in Bowman (PI 483237)*6 (GSHO 2266).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

Prepared:

J.D. Franckowiak. 2002. BGN 32:113.

BGS 613, Branched 1, brc1

Stock number: BGS 613

Locus name: Branched 1

Locus symbol: brc1

Previous nomenclature and gene symbolization:

Branched-5 = brc-5 (1, 2).

Inheritance:

Monofactorial recessive (2).

Located in chromosome 2HS, about 2.5 cM from AFLP marker E3636-2 and proximal from molecular marker CDO665A (2), which is in Bin 2H-05.

Description:

A second‑order ramification of the barley spike occurs. Rachillas in the basal part of the spike elongate to form rachis-like branches, and thus generating a ramified spike phenotype (1, 2).

Origin of mutant:

Natural occurrence in line BGRC 13145 from the Braunschweig seed collection (Hordeum vulgare L. convar distichon (L.) Alef. var. inerme Körn.) (3).

Mutational events:

brc1.5 in BGRC 13145 (G22, SG-H3/5/8-88 from Köln) Braunschweig seed collection (2, 3).

Mutant used for description and seed stocks:

brc1.5 in G22 (3); brc1.5 in Bowman (PI 483237)*2.

References:

2. Castiglioni, P., C. Pozzi, M. Heun, V. Terzi, K.J. Müller, W. Rohde, and F. Salamini. 1998. An AFLP‑based procedure for the efficient mapping of mutations and DNA probes in barley. Genetics 149:2039‑2056.

3. Salamini, F. (Personal communications).

Prepared:

J.D. Franckowiak and U. Lundqvist. 2002. BGN 32:114.

BGS 614, Zeocriton 2, Zeo2

Stock number: BGS 614

Locus name: Zeocriton 2

Locus symbol: Zeo2

Previous nomenclature and gene symbolization:

Zeocriton with no gene symbol (3).

Zeocriton 2 = Zeo2 (2).

Inheritance:

Monofactorial dominant (1).

Location is unknown.

Description:

Spikes have compact appearance because rachis internodes are shorter (3.0 vs. 4.1 mm) than those of normal sibs. The spike remains strap-shaped because all rachis internodes are about the same length. Plants are slightly shorter and spikes contain 2 to 4 more fertile spikelets than those of normal sibs (1). Hayes and Harlan (3) named this phenotype zeocriton (little barley), but they reported that three genes controlled this trait in their cross to zeocriton (4).

Origin of mutant:

A naturally occurring variant in two-rowed barley (1, 5).

Mutational events:

Zeo2.c was isolated from line 36Ab51 (GSHO 637), which was called Agood zeocriton@ (1, 5).

Mutant used for description and seed stocks:

Zeo2.c in 36Ab51 (GSHO 637); Zeo2.c in Bowman (PI 483237)*4.

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1999. Coordinator=s report: Semidwarf genes. BGN 29:74-79.

3. Hayes, H.K., and H.V. Harlan. 1920. The inheritance of the length of internode in the rachis of the barley spike. U.S. Dept. Agr., Bull. 869. 26 pp.

4. Smith, L. 1951. Cytology and genetics of barley. Bot. Rev. 17:1-51, 133-202, 285-355.

5. USDA-ARS. No date. List of Genetic Stocks in Barley. USDA-ARS National Small Grains Germplasm Research Facility, Aberdeen, Idaho.

Prepared:

J.D. Franckowiak. 2002. BGN 32:115.

BGS 615, Waxy spike 1, wxs1

Stock number: BGS 615

Locus name: Waxy spike 1

Locus symbol: wxs1

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (1).

Location is unknown.

Description:

Plants with the wxs1.a gene accumulate excess surface waxes on the spike. Spikes appear normal at heading, but gradually they accumulate more surface waxes. Spikes have a distinctive white hue prior to ripening. The grain has a irregular surface caused by poor adherence of the lemma to the caryopsis. The wxs1.a plants are slightly shorter and lodge easier than their normal sibs. Awn length is decreased and grain yield is reduced. Expression of wxs1.a allele is suppressed by glossy spike mutants (1).

Origin of mutant:

A sodium azide induced mutant in Steptoe (CIho 15229) (2).

Mutational events:

wxs1.a in Steptoe (FN16) (2).

Mutant used for description and seed stocks:

wxs1.a in Steptoe; wxs1.a in Bowman (PI 483237)*5.

References:

1. Franckowiak, J.D. (Unpublished).

2. Kleinhofs, A. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:116.

BGS 616, Uniculme 3, cul3

Stock number: BGS 616

Locus name: Uniculme 3

Locus symbol: cul3

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (3).

Location is unknown.

Description:

Plants have only one tiller, which is taller and thicker than those of normal sibs. Spikes are lax and malformed with extra lateral spikelets at some rachis nodes and none at others. The first basal rachis internode is sometimes curved (3). Grain set is very low in the Bowman backcross-derived line, which causes a problem with maintenance of the line (1).

Origin of mutant:

An X-ray induced mutant in Donaria (PI 161974) (3).

Mutational events:

cul3.c in Donaria (Mut. 3170, DWS 1343) (2, 3).

Mutant used for description and seed stocks:

cul3.c in Donaria (GSHO 2494); cul3.c in Bowman (PI 483237)*7.

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

3. Scholz, F., and O. Lehmann. 1958. Die Gaterslebener Mutanten der Saatgerste in Beziehung zur Formenmannigfaltigkeit der Art Hordeum vulgare L.s.l. I. Kulturpflanze 6:123-166.

Prepared:

J.D. Franckowiak and U. Lundqvist. 2002. BGN 32:117.

BGS 617, Uniculme 4, cul4

Stock number: BGS 617

Locus name: Uniculme 4

Locus symbol: cul4

Previous nomenclature and gene symbolization:

Uniculme-5 = uc-5 (2).

Inheritance:

Monofactorial recessive (2).

Location is unknown.

Description:

Plants produce 1 to 4 tillers that are twisted and have slightly bowed culm internodes. All secondary tillers are shorter than the primary tiller and have a curly appearance. Often secondary tillers are trapped at the base of the primary tiller. Compared to normal sibs, cul4 plants have longer peduncles and longer rachis internodes, 5.0 vs. 4.1 mm (1, 3).

Origin of mutant:

An ethylene oxide induced mutant in Bonus (PI 189763) (3).

Mutational events:

cul4.3 in Bonus (GSHO 2495, NGB 115062); cul4.5 in Bonus (NGB 115063) (2, 3).

Mutant used for description and seed stocks:

cul4.5 in Bonus (GSHO 2493, NGB 115063); cul4.5 in Bowman (PI 483237)*7 (GSHO 2361).

References:

1. Franckowiak, J.D. (Unpublished).

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. (Unpublished).

Prepared:

J.D. Franckowiak and U. Lundqvist. 2002. BGN 32:118.

BGS 618, Many noded dwarf 3, mnd3

Stock number: BGS 618

Locus name: Many noded dwarf 3

Locus symbol: mnd3

Previous nomenclature and gene symbolization:

Many noded dwarf 3 = mn3 (5).

Many noded dwarf = m3 (4).

Many noded dwarf 3 = mnd3 (2).

Inheritance:

Monofactorial recessive (5, 6).

Located in chromosome 3H, over 36.7 cM from the uzu (uzu) locus (5).

Description:

In plants homozygous for the mnd3.d gene, all plant parts are somewhat reduced in size. The number of elongated culm internodes is increased by 1 or 2 compared to normal sibs. Plants are 2/3 to 3/4 normal height. In the Bowman backcross-derived line, spikes are about 1/3 normal length and often show partial fertility. However, the mnd3.d gene does not reduce fertility and spike appears normal in R.I. Wolfe=s Multiple Marker Stock for chromosome 2H (1).

Origin of mutant:

A gamma-ray induced mutant in Montcalm (CIho 7149) (5).

Mutational events:

mnd3.d from Montcalm, but isolated from R.I. Wolfe=s Multiple Marker Stock for chromosome 2H (DWS1346) (1, 2).

Mutant used for description and seed stocks:

mnd3.d in Wolfe=s 2.1 Stock/Bowman (GSHO 1797); mnd3.d in Bowman (PI 483237)*7 (GSHO 1949).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1999. Coordinator=s report: Semidwarf genes. BGN 29:74-79.

3. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

4. Robertson, D.W., G.A. Wiebe, R.G. Shands, and A. Hagberg. 1965. A summary of linkage studies in cultivated barley, Hordeum species: Supplement III, 1954-1963. Crop Sci. 5:33-43.

5. Walker, G.W.R., J. Dietrich, R. Miller, and K.J. Kasha. 1963. Recent barley mutants and their linkages II. Genetic data for further mutants. Can. J. Genet. Cytol. 5:200-219.

6. Walker, G.W., K. Kasha, and R.A. Miller. 1958. Recombination studies in barley. Proc. Genet. Soc. Can. 3:41-43.

Prepared:

J.D. Franckowiak. 2002. BGN 32:119.

BGS 619, Bracteatum-a, bra-a

Stock number: BGS 619

Locus name: Bracteatum-a

Locus symbol: bra-a

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (3, 4).

Located in chromosome 7HS [1S], based on linkage drag with the ant1 (anthocyanin-less 1) locus (2).

Description:

Leaf-like structures or bracts develop from the rachis slightly below the rachis node at which the spikelets are attached (1). The bract associated with the lowest spikelet is always the largest and the bracts become progressively smaller toward the tip of the spike (4). Spikes are about 3/4 normal length and plants are 3/4 normal height in the Bowman backcross-derived line. Peduncles are about 1/3 normal length and the grain is relatively thin. Development of the bracts is poor in the Bowman backcross-derived line (2).

Origin of mutant:

A neutron induced mutant in Bonus (PI 189763) (3, 4).

Mutational events:

bra-a.001 in Bonus (NGB 114318), bra-a.003 in Bonus (NGB 114320) (4).

Mutant used for description and seed stocks:

bra-a.001 in Bonus (GSHO 1693, NGB 114318); bra-a.001 in Bowman (PI 483237)*6 (GSHO 2183).

References:

1. Bossinger, G., U. Lundqvist, W. Rohde, and F. Salamini. 1992 Genetics of plant development in barley. p. 989-1017. In L. Munck, K. Kirkegaard, and B. Jensen (eds.). Barley Genetics VI. Proc. Sixth Int. Barley Genet. Symp., Helsingborg, 1991. Munksgaard Int. Publ., Copenhagen.

2. Franckowiak, J.D. (Unpublished).

3. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

4. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:120.

BGS 620, Calcaroides-b, cal-b

Stock number: BGS 620

Locus name: Calcaroides-b

Locus symbol: cal-b

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (3).

Located in chromosome 5HL [7], about 4.2 cM proximal from AFLP marker E4040-4 and probably near molecular marker CDO749 in Bin 5H-04 (5).

Description:

At the tip of the lemma proper, in a position corresponding to the transition between lemma and awn, cal-b mutants have a knee-like ectopic structure (1, 5). In mutant cal-b.2 frequently only an enlargement of the basal third of the awn is evident and the enlargement is expressed more in terminal and subterminal spikelets. Leaf knots and leaf curling occurs also (4). In the Bowman backcross-derived line, plants and slightly shorter and spikes have a more lax arrangement of spikelets (2).

Origin of mutant:

An X-ray induced mutant in Bonus (PI 189763) (3, 4).

Mutational events:

cal-b.2 in Bonus (NGB 114282) (4); cal-b.19 in Bonus (NGB 114298) (4).

Mutant used for description and seed stocks:

cal-b.2 in Bonus (GSHO 1697, NGB 114282); cal-b.2 in Bowman (PI 483237)*4 (GSHO 2187).

References:

2. Franckowiak, J.D. (Unpublished).

3. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

4. Lundqvist, U. 1993 Coordinator's report: Ear morphology genes. BGN 22:137‑139.

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:121.

BGS 621, Calcaroides-c, Cal-c

Stock number: BGS 621

Locus name: Calcaroides-c

Locus symbol: Cal-c

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial dominant (2).

Located in chromosome 5HL [7L], very close or allelic to cal-b (calcaroides-b) locus (4), near molecular marker WG530 in Bin 5H-06 (4).

Description:

At the tip of the lemma proper, in a position corresponding to the transition between lemma and awn, the Cal-c mutant bear a well‑organized ectopic structure, the sac plus pronounced lemma wings (1, 4). The distal awn is short and develops small wings (4). In contrast to the Kap (hooded lemma) phenotype, the sac does not develop into an epiphyllous flower. Leaf knots are observed, but leaf curling is not (4).

Origin of mutant:

A neutron induced mutant in Bonus (PI 189763) (2, 3).

Mutational events:

Cal-c.15 in Bonus (NGB 114294) (3).

Mutant used for description and seed stocks:

Cal-c.15 in Bonus (GSHO 1567, NGB 114294); Cal-c.15 in Bowman (PI 483237)*4 (GSHO 2188).

References:

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. 1993 Coordinator's report: Ear morphology genes. BGN 22:137‑139.

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:122.

BGS 622, Calcaroides-e, cal-e

Stock number: BGS 622

Locus name: Calcaroides-e

Locus symbol: cal-e

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (2).

Located in chromosome 5HS [7S], about 23 cM distal from AFLP marker E3432-2, which is proximal from molecular marker WG889 in Bin 5H-06 (3).

Description:

At the tip of the lemma proper, in a position corresponding to the transition between lemma and awn, the cal-e mutant has a distinctive ectopic structure, which include a sac, sac appendages, and awn wings (3). The cal-e mutant bears a short distal awn. In contrast to the Kap (hooded lemma) phenotype, the sac does not develop into an epiphyllous flower (3).

Origin of mutant:

A sodium azide induced mutant in Semira (NGB 10716) (1, 2).

Mutational events:

cal-e.23 in Semira (NGB 119382) (2).

Mutant used for description and seed stocks:

cal-e.23 in Semira (NGB 119382).

References:

1. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

2. Lundqvist, U. 1993 Coordinator's report: Ear morphology genes. BGN 22:137‑139.

3. Pozzi, C., P. Faccioli, V. Terzi, A.M. Stanca, S. Cerioli, P. Castiglioni, R. Fink, R. Capone, K.J. Müller, G. Bossinger, W. Rohde, and F. Salamini. 2000. Genetics of mutations affecting the development of a barley floral bract. Genetics 154:1335‑1346.

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:123.

BGS 623. Eligulum-a, eli-a

Stock number: BGS 623

Locus name: Eligulum-a

Locus symbol: eli-a

Previous nomenclature and gene symbolization:

Eligulum-a = lig-a (2).

Eligulum-3 = eli-3 (3).

Inheritance:

Monofactorial recessive (2).

Location is unknown.

Description:

Plants do not have ligules in the junction between the sheath and leaf blade. Plants are about 2/3 of normal height and have very wide leaves. The peduncle is short and spike emergence from the sheath of the flag leaf is poor. Spikes have a compact arrangement of spikelets and are extremely compacted near the tip. The culm breaks very easily just below the nodes (1, 3).

Origin of mutant:

An ethylene imine induced mutant in Foma (CIho 11333) (2, 3).

Mutational events:

eli-a.3 (NGB 115390), -a.7 (NGB 115392), -a.9 (NGB 115393), -a.10 (NGB 115394) in Foma (3); eli-a.11 (NGB 115395), -a.14 (NGB 115397) in Kristina (NGB 1500); eli-a.15 (NGB 115398), -a.16 (NGB 151399) in Bonus (PI 189763 (3).

Mutant used for description and seed stocks:

eli-a.3 in Foma (NGB 115390); eli-a.3 in Bowman (PI 483237)*2.

References:

1. Franckowiak, J. D. (Unpublished).

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:124.

BGS 624, Opposite spikelets 1, ops1

Stock number: BGS 624

Locus name: Opposite spikelets 1

Locus symbol: ops1

Previous nomenclature and gene symbolization:

Opposite spikelets-3 = op-3 (2, 3).

Inheritance:

Monofactorial recessive (3).

Location is unknown.

Description:

Plants with the ops1 gene have a reduced number of tillers and very few late tillers. Variable lengths of the rachis internodes causes an irregular arrangement of spikelets in the spike. Compared to normal sibs, ops1 plants are slightly shorter and lower yielding (1, 3).

Origin of mutant:

A sodium azide induced mutant in Bonus (PI 189763) (3).

Mutational events:

ops1.3 in Bonus (NGB 115379) (3).

Mutant used for description and seed stocks:

ops1.3 in Bonus (GSHO 2427, NGB 115379); ops1.3 in Bowman (PI 483237)*6 (GSHO 2318).

References:

1. Franckowiak, J.D. 2000. (Unpublished).

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. 2000. (Unpublished).

Prepared:

U. Lundqvist and J.D. Franckowiak. 2002. BGN 32:125.

BGS 625, Scirpoides-a, sci-a

Stock number: BGS 625

Locus name: Scirpoides-a

Locus symbol: sci-a

Previous nomenclature and gene symbolization:

Scirpoides-1 = sci-1 (2).

Scirpoides-3 = sci-3 (2).

Inheritance:

Monofactorial recessive (1).

Location is unknown.

Description:

Plants expressing the sci-a gene have very narrow leaves and inward folded leaf blades. The tip of emerging leaf blade is sometimes trapped inside the previous one. Folding of the leaf blade persists until maturity. Premature yellowing of leaf blade tips may occur shortly after heading. Spikes are 1/2 to 2/3 normal length and plant height is reduced slightly (1, 3).

Origin of mutant:

A neutron induced mutant in Bonus (PI 189763) (3).

Mutational events:

sci-a.3 in Bonus (NGB 117097) (3); sci-a.1 (NGB 117095) in Gull (CIho 1145, GSHO 466) (3).

Mutant used for description and seed stocks:

sci-a.3 in Bonus (NGB 117097), sci-a.3 in Bowman (PI 483237)*4.

References:

1. Franckowiak, J.D. (Unpublished).

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:126.

BGS 626, Scirpoides leaf-a, scl-a

Stock number: BGS 626

Locus name: Scirpoides leaf-a

Locus symbol: scl-a

Previous nomenclature and gene symbolization:

Scirpoides leaf-6 = scl-6 (2).

Inheritance:

Monofactorial recessive (2).

Location is unknown.

Description:

Leaf blades of scl-a plants are folded inward and are narrow compared to those of normal sibs. Folding of the leaf blade persists until maturity. Plants are slightly shorter than normal sibs and lower yielding. The grain appears thinner (1, 2).

Origin of mutant:

A neutron induced mutant in Foma (CIho 11333) (2).

Mutational events:

scl-a.6 in Foma (NGB 117105) (2).

Mutant used for description and seed stocks:

scl-a.6 in Foma (NGB 117105), scl-a.6 in Bowman (PI 483237)*5.

References:

1. Franckowiak, J.D. (Unpublished).

2. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:127.

BGS 627, Viviparoides-a, viv-a

Stock number: BGS 627

Locus name: Viviparoides-a

Locus symbol: viv-a

Previous nomenclature and gene symbolization:

Viviparoides-5 = viv-5 (3, 4).

Inheritance:

Monofactorial recessive (2, 4).

Location is unknown.

Description:

Tillers of viv-a plants may remain vegetative and fail to produce reproductive structures. The apex of the tillers remains vegetative as the culm elongates. Occasionally a short, malformed spike is formed in a lateral position (1, 4). In the Bowman backcross-derived line, only a few tiller exhibit the typical viviparoides phenotype. However, plants are shorter, lodge easily, and produce much less grain. Also, awns are slightly shorter, the grain is thinner, and hull adherence is poorer (2).

Origin of mutant:

An ethylene imine induced mutant in Foma (CIho 11333) (4).

Mutational events:

viv-a.5 in Foma (NGB 115364) (4).

Mutant used for description and seed stocks:

viv-a.5 in Foma (GSHO 2498, NGB 115364); viv-a.5 in Bowman (PI 483237)*3 (GSHO 2364).

References:

2. Franckowiak, J.D. (Unpublished).

3. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

4. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:128.

BGS 628, Shrunken endosperm xenia 7, sex7

Stock number: BGS 628

Locus name: Shrunken endosperm xenia 7

Locus symbol: sex7

Previous nomenclature and gene symbolization:

Shrunken endosperm xenia-i = sex.i (2).

Inheritance:

Monofactorial recessive (2).

Located in chromosome 5HL [7L], based on linkage drag with the Raw2 (smooth awn 2) locus (2).

Description:

Starting at the hard dough stage, the grain develops a depression in the dorsal or lemma side. This depression is very distinct at maturity. In plants heterozygous at the sex7 locus, a xenia pattern of expression is observed. The expression of sex7 is much stronger than that of lys1 (high lysine 1), the only other shrunken endosperm xenia mutant located near the Raw1 (smooth awn 1) locus (1).

Origin of mutant:

A spontaneous mutant in a selection from cross I90-374 (Bowman*5/Mut. 2612) (1).

Mutational events:

sex7.i in I90-374-1 (GSHO 2470) (1).

Mutant used for description and seed stocks:

sex7.i in I90-374-1 (GSHO 2470); sex7.i in Bowman (PI 483237)*7 (GSHO 2133).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.

Prepared:

J.D. Franckowiak. 2002. BGN 32:129.

BGS 629, Mottled leaf 6, mtt6

Stock number: BGS 629

Locus name: Mottled leaf 6

Locus symbol: mtt6

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (1).

Location is unknown.

Description:

Seedlings are slightly pale green in color and develop a necrotic region partially across the blade of the first. Occasionally necrotic blotches or region develop in subsequent leaf blades. Plants are taller than normal sibs and remain a slightly pale shade of green until maturity. Plant vigor appears normal, but grain yields are slightly lower than those of normal sibs (1).

Origin of mutant:

A spontaneous mutant in selection ND6809 from a ND2654-31/Karl cross (1).

Mutational events:

mtt6.g in ND6809-1 (GSHO 2411) (1).

Mutant used for description and seed stocks:

mtt6.g in ND6809 (GSHO 2411); mtt6.g in Bowman (PI 483237)*8 (GSHO 2311).

References:

1. Franckowiak, J.D. (Unpublished).

Prepared:

J.D. Franckowiak. 2002. BGN 32:130.

BGS 630, Breviaristatum-s, Ari-s

Stock number: BGS 630

Locus name: Breviaristatum-s

Locus symbol: Ari-s

Previous nomenclature and gene symbolization:

Breviaristatum-265 = ari-265 (2).

Inheritance:

Monofactorial incomplete dominant (1).

Location is unknown.

Description:

Awns of plants homozygous for the Ari-s.265 allele are about 1/3 normal length and slightly wider than those of normal sibs. The grain is wide and short and has a globose shape. Sterile lateral spikelets and glumes are about half normal length. Rachis internodes are shortened slightly, plants are 3/4 to 5/6 normal height, and plant vigor is reduced. Awns of plants heterozygous for the Ari-s.265 allele are 3/4 normal length. A slight shortening of other parts of the spike is observed in heterozygotes (1).

Origin of mutant:

A gamma-ray induced mutant in Kristina (NGB 1500) (2, 3).

Mutational events:

Ari-s.265 in Kristina (NGB 116074) (3).

Mutant used for description and seed stocks:

Ari-s.265 in Kristina (NGB 116074); Ari-s.265 in Bowman (PI 483237)*6.

References:

1. Franckowiak, J.D. (Unpublished).

2. Kucera, J., U. Lundqvist, and Å. Gustafsson. 1975. Inheritance of breviaristatum mutants in barley. Hereditas 80:263-278.

3. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J.D. Franckowiak. 2002. BGN 32:131.

BGS 631, Brachytic 3, brh3

Stock number: BGS 631

Locus name: Brachytic 3

Locus symbol: brh3

Previous nomenclature and gene symbolization:

Brachytic-g = brh.g (2).

Inheritance:

Monofactorial recessive (2, 3).

Location is unknown.

Description:

The seedling leaf of brh3 plants is shorter than that of normal sibs. Plants are 2/3 to 3/4 of normal height and the number of tillers per plant is reduced. Awns are fine with slightly curly tips and are about 1/2 normal length. Spikes of brh3 plants have a slightly elongated first rachis internode. Seed set may be reduced when plants are grown under greenhouse conditions. (1).

Origin of mutant:

Probably a sodium azide induced mutant in Birgitta (NSGC 1870) (5).

Mutational events:

brh3.g in Birgitta (17:10:1, DWS1002) (2, 3, 5); brh3.y (10001, DWS1230, GSHO 1688) in Bido (PI 399485) (2, 4).

Mutant used for description and seed stocks:

brh3.g in Birgitta (GSHO 1672); brh3.g in Bowman (PI 483237)*7 (GSHO 2167).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D. 1995. The brachytic class of semidwarf mutants in barley. BGN 24:56-59.

3. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

4. Gaul, H. 1986. (Personal communications).

5. Lehmann, L. 1985. (Personal communications).

Prepared:

J.D. Franckowiak. 2002. BGN 32:132.

BGS 632, Many noded dwarf 5, mnd5

Stock number: BGS 632

Locus name: Many noded dwarf 5

Locus symbol: mnd5

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (1).

Location is unknown.

Description:

When grown in the field, plants are about 1/2 normal height with numerous tillers. Each tiller has numerous small leaves and a spike of about 1/3 normal size. Plants head late under field conditions. Culm branches with 4 to 7 leaves each may develop at the uppermost culm node, but these branches develop late and have very small spikes. When grown in the greenhouse, plants are tall and late compared with normal sibs. Each culm may have 15 to 20 elongated internodes (1).

Origin of mutant:

A spontaneous mutant in cross C2-95-199 (Logan/ND15053) (1).

Mutational events:

mnd5.g in C2-95-199-1 (1).

Mutant used for description and seed stocks:

mnd5.g in C2-95-199-1; mnd5.g in Bowman (PI483237)*3.

References:

1. Franckowiak, J.D. (Unpublished).

Prepared:

J.D. Franckowiak, 2002. BGN 32:133.

BGS 633, Many noded dwarf 6, mnd6

Stock number: BGS 633

Locus name: Many noded dwarf 6

Locus symbol: mnd6

Previous nomenclature and gene symbolization:

Densinodosum-6 = den-6 (3, 4).

Inheritance:

Monofactorial recessive (4).

Location is unknown.

Description:

Plants with the mnd6.6 gene are about 3/4 of normal height and have many elongated internodes in each culm. The number of elongated internodes can be up to 20 in the original stock when grown in the field in Sweden (4). The grain is small and thin compared to that of normal sibs (2, 4). The number of tillers per plant is increased compared to normal sibs. Spikes are shorter because the length of rachis internodes is reduced slightly and fewer fertile spikelets develop. Awns are about 2/3 normal length. The Bowman backcross-derived line has 9 to 10 elongated internodes per tiller (2).

Origin of mutant:

An ethylene imine induced mutant in Bonus (PI 189763) (4).

Mutational events:

mnd6.6 in Bonus (NGB 114514) (4).

Mutant used for description and seed stocks:

mnd6.6 in Bonus (GSHO 1713, NGB 114514), mnd6.6 in Bowman (PI 483237)*7 (GSHO 2235).

References:

2. Franckowiak, J.D. (Unpublished).

3. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

4. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:134.

BGS 634, Premature ripe 2, pmr2

Stock number: BGS 634

Locus name: Premature ripe 2

Locus symbol: pmr2

Previous nomenclature and gene symbolization:

Necroticans 50 = nec-50 (2, 3).

Inheritance:

Monofactorial recessive (3).

Location is unknown.

Description:

Plants appear normal until shortly before heading. Prior to heading, tan to light brown blotches start to develop on the leaf blades. The blotches enlarge rapidly and coalesce and the leaf blades gradually die (1, 3). Peduncle elongation is poor, and plants are shorter than normal sibs. Although leaf sheaths and spikes remain green, plants ripen prematurely. After the plants ripen, the straw collapses easily. The grain is small and thin (1).

Origin of mutant:

An ethyl methanesulfonate induced mutant in Bonus (PI 189763) (3).

Mutational events:

pmr2.b (nec-50) in Bonus (NGB 115311) (3).

Mutant used for description and seed stocks:

pmr2.b in Bonus (GSHO 2421, NGB 115311); pmr2.b in Bowman (PI 483237)*5 (GSHO 2313).

References:

1. Franckowiak, J.D. (Unpublished).

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:135.

BGS 635, Necroticans 7 nec7

Stock number: BGS 635

Locus name: Necroticans 7

Locus symbol: nec7

Previous nomenclature and gene symbolization:

Necroticans 45 = nec-45 (2, 3).

Inheritance:

Monofactorial recessive (3).

Location is unknown.

Description:

As each tiller of plants homozygous for the nec7 gene starts to head, dark brown blotches become visible on the leaf blades and sheaths. The blotches are variable in size and irregular in shape. They gradually enlarge and partially coalesce. Blotches range in size from small spots to large ones that may include 1/5 of the leaf blade or more. Some blotches are partially surrounded by a golden or yellowish halo before that region of the leaf dies (1, 3). When nec7 plants are grown in greenhouses, formation of the dark brown blotches is associated with a distinct musty odor, which persists even after plants ripen (1).

Origin of mutant:

An ethyl methanesulfonate induced mutant in Kristina (NGB 1500) (3).

Mutational events:

nec7.45 (nec-45) in Kristina (NGB 115306) (3).

Mutant used for description and seed stocks:

nec7.45 in Kristina (GSHO 2420, NGB 115306); nec7.45 in Bowman (PI 483237)*2.

References:

1. Franckowiak, J.D. (Unpublished).

2. Gustafsson, Å., A. Hagberg, U. Lundqvist, and G. Persson. 1969. A proposed system of symbols for the collection of barley mutants at Svalöv. Hereditas 62:409-414.

3. Lundqvist, U. (Unpublished).

Prepared:

U. Lundqvist and J. D. Franckowiak. 2002. BGN 32:136.

BGS 636, Lesser internode number 2, lin2

Stock number: BGS 636

Locus name: Lesser internode number 2

Locus symbol: lin2

Previous nomenclature and gene symbolization:

None.

Inheritance:

Monofactorial recessive (4).

Location is unknown.

Description:

Spikes of lin2.b plants are 1/4 to 1/2 of normal length because seed set fails in the upper portion of the spike. Slow or poor development of the spike reduces both the number of rachis internodes and number of fertile spikelets (1, 4). Most spikes of the Bowman backcross-derived line set less than 10 seeds. Plants are shorter than are normal sibs because peduncles fail to elongate normally. Both rachis internode length and awn length are reduced in lin2 plants (1).

Origin of mutant:

An X-ray induced mutant in Donaria (PI 161974) (3, 4).

Mutational events:

lin2.b in Donaria (Mut. 2249, DWS1337) (2, 3).

Mutant used for description and seed stocks:

lin2.b in Haisa (GSHO 1781); lin2.b in Bowman (PI 483237)*5 (GSHO 2280).

References:

1. Franckowiak, J.D. (Unpublished).

2. Franckowiak, J.D., and A. Pecio. 1992. Coordinator=s report: Semidwarf genes. A listing of genetic stocks. BGN 21:116-127.

4. Scholz, F., and O. Lehmann. 1958. Die Gaterslebener Mutanten der Saatgerste in Beziehung zur Formenmannigfaltigkeit der Art Hordeum vulgare L.s.l.I. Kulturpflanze 6:123-166.

Prepared:

J.D. Franckowiak and U. Lundqvist. 2002. BGN 32:137.