Stock number: BGS 301
Locus name: Fragile stem 1
Locus symbol: fst1

Previous nomenclature and gene symbolization:

Fragile stem = fs (4).

Monofactorial recessive (4).
Located in chromosome 5HL [7L] (3, 4), about 24.3 cM proximal from the srh (short rachilla hair) locus (1, 2, 5).

Leaves and stems of mutant plants are easily broken when physical bent. This extraordinary fragility is exhibited even after maturity. Generally, stems are more flexible than in normal plants, and straw breakage prior to harvest is rare (4). In lines homozygous for the fst1.a gene, straw collapse and/or lodging occurs more frequently. Forage yield is reduced slightly by the fst1.a gene.

A spontaneous mutant in an unknown cultivar and named Kamairazu, which means "sickle not needed to harvest" (4).

fst1.a in Kamairazu (OUL008) (4); fst1.d probably originating from Kamairazu in a Western Plant Breeders selection.
Mutant used for description and seed stocks:
fst1.a in Kamairazu (GSHO 629); fst1.a in Bowman (PI 483237)*5 (GSHO 2100); fst1.d in Bowman*7 (GSHO 2101).

1. Hayashi, J., I. Moriya, and R. Takahashi. 1983. A further study on linkage of the "dusky" mutant, dsk. BGN 13:42-44.
2. Jensen, J. 1981. Construction of a barley chromosome 7 linkage map. p. 927-939. 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.
3. Ramage, R.T., and C.A. Suneson. 1961. Translocation-gene linkages on barley chromosome 7. Crop Sci. 1:319-320.
4. Takahashi, R., J. Yamamoto, S. Yasuda, and Y. Itano. 1953. Inheritance and linkage studies in barley. Ber. Ohara Inst. landw. Forsch. 10:29-52.
5. Yoshimi, R., and T. Konishi. 1995. Linkage analysis of several isozyme loci in barley. BGN 24:35-37.

T.E. Haus and T. Tsuchiya. 1971. BGN 1:160.

J.D. Franckowiak and T. Konishi. 1997. BGN 26:252.

Stock number: BGS 302
Locus name: Mottled leaf 2
Locus symbol: mtt2

Previous nomenclature and gene symbolization:

Mottled leaf 2 = mt2 (1).

Monofactorial recessive (1).
Located in chromosome 5HL [7L] (1), about 26.1 cM proximal from the srh (short rachilla hair) locus (1).

Yellow to ivory bands, rarely necrotic, appear at emergence on the seedling leaf. They gradually disappear and are absent at heading (1). Expression is better when alternating temperatures occur, but even under constant temperatures, the tip of the first leaf is yellow or pale green. Plant vigor and maturity seem unaffected by the presence of the mtt2.b gene.

A Rad-Beryll induced mutant in Montcalm (CIho 7149) (1).

mtt2.b in Montcalm (Alb Acc 285) (1).
Mutant used for description and seed stocks:
mtt2.b in Montcalm (GSHO 1398); mtt2.b in Bowman (PI 483237)*7 (GSHO 2099).

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

T. Tsuchiya and T.E. Haus. 1971. BGN 1:161.

J.D. Franckowiak. 1997. BGN 26:253.

Stock number: BGS 303
Locus name: Variegated 3
Locus symbol: var3

Previous nomenclature and gene symbolization:

Variegated 3 = va3 (2).

Monofactorial recessive (2).
Located in chromosome 5HL [7L] (2), about 29.7 cM distal from the raw1 (smooth awn 1) locus (2); Karlsson was unable to confirm the presence of va3 in chromosome 5H (1).

Narrow white stripes appear on the foliage and stems, but they are less extensive than the white streak 7 (wst7) type of streaks (2). Expression of var3.c is poor in the Bowman backcross-derived line.

An X-ray induced mutant in Montcalm (CIho 7149) (2).

var3.c in Montcalm (Alb Acc 306) (2).
Mutant used for description and seed stocks:
var3.c in Montcalm (GSHO 1277); var3.c in Bowman (PI 483237)*5 (GSHO 2143).

1. Karlsson, K.-E. 1976. Linkage studies on the lys-gene in relation to some marker genes and translocations. p. 536-541. In H. Gaul (ed.) Barley Genetics III. Proc. Third Int. Barley Genet. Symp., Garching, 1975. Verlag Karl Thiemig, München.
2. Walker, G.W.R., J. Dietrich, R. Miller, and K. Kasha. 1963. Recent barley mutants and their linkages II. Genetic data for further mutants. Can. J. Genet. Cytol. 5:200-219.

T.E. Haus and Tsuchiya. 1971. BGS 1:162.

J.D. Franckowiak. 1997. BGN 26:254.

Stock number: BGS 304
Locus name: White streak 2
Locus symbol: wst2

Previous nomenclature and gene symbolization:

White streak 2 = wst2 (1).

Monofactorial recessive (1).
Located in chromosome 5HL [7L] (1), about 3.6 cM proximal from the srh (short rachilla hair) locus (1).

When grown at low temperatures, mutants exhibit wide and numerous white stripes on the developing leaves and plants become almost albinic or chlorotic. Exposure to 3 C for about two weeks immediately after sowing induces distinct streaks on the first and second leaves. As temperatures rise, subsequent leaves have only a few, narrow white stripes (1).

A spontaneous mutant in a Japanese naked "uzu" variety grown on Manabe Island (1).

wst2.b in OUL067 (1).
Mutant used for description and seed stocks:
wst2.b in OUL067 (GSHO 766); wst2.b in Bowman (PI 483237)*5 (GSHO 2102).

1. Takahashi, R., and I. Moriya. 1969. Inheritance and linkage studies in barley. IV. Linkages of four variegated mutants. Ber. Ohara Inst. landw. Biol., Okayama Univ. 15:35-46.

T.E. Haus and T. Tsuchiya. 1971. BGN 1:163.

J.D. Franckowiak and T. Konishi. 1997. BGN 26:255.

Stock number: BGS 305
Locus name: Cream seedling 1
Locus symbol: crm1

Previous nomenclature and gene symbolization:

White seedling b = a_b (2).
Albino seedling b = a_b (3).
Cream seedling = cm (1, 4).

Monofactorial recessive (2, 3).
Located in chromosome 5HL [7L], closely linked to the raw1 (smooth awn 1) locus (1), and about 26.0 cM from the srh (short rachilla hair) locus (2).

Seedlings are cream in color and survive until they are about two weeks old (4). The crm1.a gene must be maintained as a heterozygous stock.

A spontaneous mutant in Black Hulless (PI 24849) (2).

crm1.a in Black Hulless (Black Hulless III) (2).
Mutant used for description and seed stocks:
crm1.a in Black Hulless (GSHO 20).

1. Kramer, H.H., and B.A. Swomley Blander. 1961. Orienting linkage maps on the chromosomes of barley. Crop Sci. 1:339-342.
2. Robertson, D.W. 1933. Inheritance in barley. Genetics 18:148-158.
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. 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.

T.E. Haus and T. Tsuchiya. 1971. BGN 1:164.
T.E. Haus. 1988. BGN 18:83 as BGS 514, Albino seedling b, a_b.

T.E. Haus. 1988. BGN 18:81.
U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:256.

Stock number: BGS 306
Locus name: Variegated 1
Locus symbol: var1

Previous nomenclature and gene symbolization:

Variegated = va (2).

Monofactorial recessive (2).
Located in chromosome 5HL [7L] (2), about 4.6 cM proximal from the raw1 (smooth awn 1) locus (1, 2).

Narrow white stripes develop on young leaves, but they are not as well-defined than those of white streak 7 (wst7). White stripes are visible on the foliage and stems of older plants (2). When sown in plots, selections homozygous for the var1.a gene have a whitish cast until heading.

A gamma-ray induced mutant in Montcalm (CIho 7149) (2).

var1.a in Montcalm (Alb Acc 311) (2).
Mutant used for description and seed stocks:
var1.a in Montcalm (GSHO 1278); var1.a in Bowman (PI 483237)*7 (GSHO 2121).

1. Jensen, J. 1981. Construction of a barley chromosome 7 linkage map. p. 927-939. 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. Walker, G.W.R., J. Dietrich, R. Miller, and K. Kasha. 1963. Recent barley mutants and their linkages II. Genetic data for further mutants. Can. J. Genet. Cytol. 5:200-219.

T.E. Haus and T. Tsuchiya. 1971. BGN 1:165.

J.D. Franckowiak. 1997. BGN 26:257.

Stock number: BGS 308
Locus name: Long basal rachis internode 1
Locus symbol: lbi1

Previous nomenclature and gene symbolization:

Curved peduncle = cr (1).
Long basal spike internode = bi (3).
Long basal spike internode = lb (5).
Rachisextensum = rac-a and rac-b (2, 6).

Monofactorial recessive (1, 3).
Located in chromosome 5HL [7L] (3), about 16.0 cM distal from the raw1 (smooth awn 1) locus (3).

The first or basal rachis internode is much longer than the other rachis internodes. Basal internode lengths range from less than 1 cm to more than 20 cm (3, 7). Genotype, environmental conditions, and tiller health alter basal rachis internode elongation in plants homozygous for the lbi1.a gene. Expression of the lbi1.a gene is commonly more pronouced in six-rowed genotypes than in two-rowed ones.

Natural occurrence in Wisconsin Pedigree 38 (Barbless, CIho 5105) (2), and in many other six-rowed cultivars of Manchurian origin (2, 5).

lbi1.a in Wisconsin Pedigree 38 (3); rac-a.2 and rac-b.1 in Bonus (PI 189763) are not alleles of each other (4); but both rac-a.2 and rac-b.1 are reported to be alleles at the lbi1 locus (6).
Mutant used for description and seed stocks:
lbi1.a in Wisconsin Pedigree 38 (GSHO 580); lbi1.a in Bowman (PI 483237)*5 (GSHO 2144).

1. Buckley, G.F.H. 1930. Inheritance in barley with special reference to the color of caryopsis and lemma. Sci. Agric. 10:460-492.
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. Hehn, E.R. 1948. The inheritance of agronomic characters in barley. Iowa State Coll. Jour. Sci. 23:39-40. [Abstr.]
4. Lundqvist, U. (unpublished).
5. Robertson, D.W., G.A. Wiebe, and R.G. Shands. 1955. A summary of linkage studies in cultivated barley, Hordeum species: Supplement II, 1947-1953. Agron. J. 47:418-425.
6. Tsuchiya, T. 1974. Further results of allelism testing in barley. BGN 4:82-85.
7. Wiebe G.A., and D.A. Reid. 1961. Classification of barley varieties grown in the United States and Canada in 1958. U.S. Dep. Agric. Tech. Bull. 1224. 234 pp.

T.E. Haus and T. Tsuchiya. 1971. BGN 1:167.

J.D. Franckowiak and U. Lundqvist. 1997. BGN 26:258.

Stock number: BGS 309
Locus name: Spring growth habit 2
Locus symbol: Sgh2

Previous nomenclature and gene symbolization:

Spring habit of growth 2 = Sh2 (4).

Monofactorial dominant (1), but a multiple allelic series exists with the alleles for the highest grade of spring habit dominant over those for less spring-like habit. The dominant alleles are epistatic to the winter habit alleles at the sgh1 and Sgh3 loci (1, 2, 3).
Located in chromosome 5HL [7L] (1, 2), over 15.1 cM distal from the raw1 (smooth awn 1) locus (1, 2).

When grown under long-day conditions in the greenhouse, plants with the Sgh2.I gene for spring habit (grade I type) head in about 40 days. Plants with the Sgh2.II gene (grade II type) are 10 days or more later than those with Sgh2.I, and require about 10 days of pre-chilling to make up the difference in heading time (2). Complex interactions with genotype and other spring growth habits are reported (5). The Sgh2.II allele is prevalent in the Oriental region, while the Sgh2.I allele is confined to the Occidental region (1, 2).

Natural occurrence in most spring types of barley (3).

Sgh2.I or Sgh2.II are present in many spring barley cultivars and probably some wild progenitors (2).
Mutant used for description and seed stocks:
Sgh2.I in Indian Barley (OUJ694, GSHO 770); Sgh2.II in Marumi 16 (OUJ007, GSHO 767).

1. Takahashi, R., and S. Yasuda. 1956. Genetic studies of spring and winter habit of growth habit in barley. Ber. Ohara Inst. landw. Biol., Okayama Univ. 10:245-308.
2. Takahashi, R., and S. Yasuda. 1971. Genetics of earliness and growth habit in barley. p. 388-408. In R.A. Nilan (ed.) Barley Genetics II. Proc. Second Int. Barley Genet. Symp., Pullman, WA, 1969. Washington State Univ. Press, Pullman.
3. Takahashi, R., S. Yasuda, J. Hayashi, T. Fukuyama, I. Moriya, and T. Konishi. 1983. Catalogue of barley germplasm preserved in Okayama University. Inst. Agric. Biol. Sci., Okayama Univ., Kurashiki, Japan. 217 p.
4. Takahashi, R., S. Yasuda, J. Hayashi, and I. Shiojiri. 1954. [Physiology and genetics of ear emergence in wheat and barley. III. Genetic studies on the spring habit of growth with various barley varieties.] Nogaku Kenkyu 41:87-96. [In Japanese.]
5. Yasuda, S. 1981. Comparison of yield and some yield components among strains with different genetic combinations of spring genes in barley. BGN 11:38-40.

S. Yasuda. 1972. BGN 2:199.

J.D. Franckowiak and T. Konishi. 1997. BGN 26:259.

Stock number: BGS 311
Locus name: Defective endosperm xenia 1
Locus symbol: dex1

Previous nomenclature and gene symbolization:

Shrunken endosperm 2 = sex2 (5).

Monofactorial recessive expressed in the endosperm as a xenia effect (4).
Located in chromosome 5HS [7S] (3, 4), about 5.0 cM proximal from the ddt (reaction to DDT) locus (3, 4).

The phenotype is expressed as "thin" seed on a heterozygous plant. Homozygous recessive seed grow normally for a few days after fertilization, then growth stops and the seed begin to shrivel. At maturity, defective endosperm seed are so small that they are barely visible within the lemma and palea. The mutant expresses xenia and behaves as a zygotic lethal. Seed produced on heterozygous plants are found in a ratio of 3 normal, viable seed to 1 defective, inviable seed (2, 3). The mutant must be maintained as a heterozygous stock.

A spontaneous mutant in the balanced tertiary trisomic line 63-j-18-17 (3, 4).

dex1.a in BBT line 63-j-18-17 (1, 4).
Mutant used for description and seed stocks:
dex1.a in BBT line 63-j-18-17.

1. Ramage, R.T., and C.L. Crandall. 1981. A proposed gene symbol for defective endosperm mutants that express xenia. BGN 11:30-31.
2. Ramage, R.T., and C.L. Crandall. 1981. BGS 311, Defective endosperm xenia, dex1a. BGN 11:104.
3. Ramage, R.T., M. Paluska, and G.A. Wiebe. 1973. Genetics and cytology of the translocation T2-7a. BGN 3:47-49.
4. Scheuring, J.F., and R.T. Ramage. 1976. A tertiary trisomic balanced for both msg2 and sex2. BGN 6:60-62.
5. Scheuring, J.F., and R.T. Ramage. 1976. BGS 311, Shrunken endosperm, xenia, sex2b. BGN 6:134.

J.F. Scheuring and R.T. Ramage. 1976. BGN 6:134.

R.T. Ramage and C.L. Crandall. 1981. BGN 11:104.
J.D. Franckowiak. 1997. BGN 26:260.

Stock number: BGS 312
Locus name: Smooth awn 1
Locus symbol: raw1

Previous nomenclature and gene symbolization:

Smooth awn = r (1).
Smooth awn = a (2).

Monofactorial recessive (1).
Located in chromosome 5HL [7L] (2, 4), about 26.8 cM distal from the srh (short rachilla hair) locus (3, 4).

Barbs or teeth on the margins of the awn are absent and the size and number of barbs on the central vein are reduced (1). Plants homozygous for the raw1.a allele have a semi-smooth awn when other recessive genes reducing the number and/or size of the barbs are absent (5). The presence of these other genes may cause a complete absence of barbs on the awn. The number of stigma hairs is relatively small in plants homozygous for raw1.a, and reduced seed set may occur in some genotype-environment combinations (7).

Natural occurrence in several cultivars, especially from Turkey and Southwest Asia (5, 6).

raw1.a in Lion (CIho 923) (1).
Mutant used for description and seed stocks:
raw1.a in Lion (GSHO 27); raw1.a in Bowman (PI 483237), probably from Lion via Midwestern six-rowed cultivars; Raw1 from ND4880 in Bowman*8 (GSHO 2124).

1. Harlan, H.V. 1920. Smooth-awned barleys. J. Am. Soc. Agron. 12:205-208.
2. Hor, K.S. 1924. Interrelations of genetic factors in barley. Genetics 9:151-180.
3. Jensen, J. 1981. Construction of a barley chromosome 7 linkage map. p. 927-939. 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.
4. 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.
5. Takahashi, R., and J. Yamamoto. 1949. [Studies on the classification and the geographic distribution of Japanese barley varieties. XI. Smoothness of awns and width of the outer glume.] Nogaku Kenkyu 38:157-160. [In Japanese.]
6. Takahashi, R., S. Yasuda, J. Hayashi, T. Fukuyama, I. Moriya, and T. Konishi. 1983. Catalogue of barley germplasm preserved in Okayama University. Inst. Agric. Biol. Sci., Okayama Univ., Kurashiki, Japan. 217 p.
7. Woodward, R.W. 1949. Sterility in Velvon barley and its relationship to yield, kernel weight, and date and rate of seeding. Agron J. 41:430-434.

T.E. Haus. 1978. BGN 8:158.

J.D. Franckowiak. 1997. BGN 26:261.

Stock number: BGS 313
Locus name: Chlorina seedling 6
Locus symbol: fch6

Previous nomenclature and gene symbolization:

Yellow virescent = yv (6).
Chlorina seedling 6 = f6 (1).

Monofactorial recessive (6).
Located in chromosome 5HL [7L] (1, 3, 5 ,6), over 36.2 cM proximal from the srh (short rachilla hair) locus (1).

Seedlings appear yellowish-white initially, but green pigments develop near the leaf tip within one week. Green pigmentation is not as intense as in normal seedlings (6). Chlorophyll content is 15% of normal in 3-week old seedlings and free amino acid content is increased by 75% or more (2). Plants do mature in the field, but development is much delayed.

An X-ray induced mutant in Himalaya (CIho 1312) (6).

fch6.g in Himalaya (GBC380) (4, 6).
Mutant used for description and seed stocks:
fch6.g in Himalaya (GSHO 1390); fch6.g in GBC681 was used for linkage studies (1); fch6.g in Bowman (PI 483237)*7 (GSHO 2097).

1. Falk, K.C., and K.J. Kasha. 1983. Linkage of the f6 chlorina mutant on chromosome 7. BGN 13:50-51.
2. Jain, M.L. 1966. Biochemical definition of yellow-virescent and light-green suppressor mutations in barley. Genetics 54:813-818.
3. Kasha, K.J. 1977. Coordinator's report: Chromosome 6. BGN 7:89-90.
4. Kasha, K.J., D.E. Falk, and A. Ho-Tsai. 1978. Linkage data with genes on chromosome 6. BGN 8:61-65.
5. Shahla, A., and T. Tsuchiya. 1984. Telotrisomic analysis in Triplo 7S in barley. BGN 14:52-53.
6. Tuleen, N.A., L.A. Synder, R.S. Caldecott, and V.S. Haitt. 1968. Genetic investigation of suppressors of a chloroplast mutation in Hordeum vulgare. Genetics 59:45-55.

K.C. Falk. 1983. BGN 13:111.

J.D. Franckowiak. 1997. BGN 26:262.

Stock number: BGS 314
Locus name Six-rowed spike 2
Locus symbol: vrs2

Previous nomenclature and gene symbolization:

Six-rowed spike 2 = v2 (4).

Stock number: BGS 315
Locus name: Six-rowed spike 3
Locus symbol: vrs3

Previous nomenclature and gene symbolization:

Six-rowed spike 3 = v3 (1).
Intermedium spike-a = int-a (4, 5, 7, 11).
Intermedium spike-g = int-g (4, 5, 9).

Monofactorial recessive (1, 3, 4, 7, 9).
Located in chromosome 1HL [5L] (2, 6, 12); near the centromere and proximal from the ert-b (erectoides-b) locus (6, 12).

The upper half of the spike appears six-rowed, but lateral spikelets in the lower half are reduced in size. The basal portion of the spike appears two-rowed. Awns on the lateral spikelets range from normal near the top, to awnletted or pointed in the middle, to awnless at the base of the spike. Seeds may develop in lateral spikelets of only the upper two-thirds of the spike. Lateral spikelets may be pedicellated in some stocks. Central spikelets often have double awns, one on the lemma and one on the palea. The rachilla may be deformed (1, 2, 3, 4, 9, 10).

A gamma-ray induced mutant in Hakata 2 (OUJ807, PI 263407) (1, 3).

vrs3.f in Hakata 2 (Kmut 213, OUM292), vrs3.g (Xb 388.8, Piro-1), vrs3.h (Xd 160.46, Piro-3), vrs3.i (X15 1463, Piro-5), vrs3.j (X17 3555, Piro-8) in Piroline (PI 539132) (3); int-a.1 in Bonus (PI 189763) (9); int-a.2 in Bonus (9, 11); int-a.8, -a.9, -a.10, -a.64 in Bonus, -a.14, -a.17, -a.21, -a.27, -a.30, -a.31, -a.32, -a.34, -a.35, -a.37 in Foma (CIho 11333), -a.46, -a.51, -a.52, -a.54, -a.55, -a.59, -a.61 in Kristina (9); int-a.71, -a.74, -a.77, -a.79, -a.86, -a.88 in Bonus, -a.102, -a.103 in Hege (8).
Mutant used for description and seed stocks:
vrs3.f in Hakata 2 (GSHO 774); int-a.1 in Bonus (GSHO 170); vrs3.f in Bowman (PI 483237)*7 (GSHO 2056); int-a.1 in Bowman*5 (GSHO 2055).

1. Fukuyama, T., J. Hayashi, I. Moriya, and R. Takahashi. 1972. A test for allelism of 32 induced six-rowed mutants. BGN 2:25-27.
2. Fukuyama, T., J. Hayashi, and R. Takahashi. 1975. Genetic and linkage studies of the five types of induced 'six-row' mutants. BGN 5:12-13.
3. Fukuyama, T., R. Takahashi, and J. Hayashi. 1982. Genetic studies on the induced six-rowed mutants in barley. Ber. Ohara Inst. landw. Biol., Okayama Univ. 18:99-113.
4. Gustafsson, Å., and U. Lundqvist. 1980. Hexastichon and intermedium mutants in barley. Hereditas 92:229-236.
5. 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.
6. Jensen, J., and J.H. Jørgensen. 1975. The barley chromosome 5 linkage map. I. Literature survey and map estimation procedure. Hereditas 80:5-16.
7. Lundqvist, U. 1991. Coordinator's report: Ear morphology genes. BGN 20:85-86.
8. Lundqvist, U. (unpublished).
9. Lundqvist, U., and A. Lundqvist. 1988. Induced intermedium mutants in barley: origin, morphology and inheritance. Hereditas 108:13-26.
10. Nötzel, H. 1952. Genetische Untersuchungen an röntgeninduzierten Gerstenmutanten. Kühn-Archiv 66:72-132.
11. Nybom, N. 1954. Mutation types in barley. Acta Agric. Scand. 4:430-456.
12. Persson, G. 1969. An attempt to find suitable genetic markers for dense ear loci in barley I. Hereditas 62:25-96.

T. Fukuyama. 1983. BGN 13:113.

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:264-265.

Stock number: BGS 317
Locus name: Reaction to DDT
Locus symbol: ddt

Previous nomenclature and gene symbolization:

Resistance to DDT = ddt (4).

Monofactorial recessive (2, 7).
Located in chromosome 5HS [7S] (3, 4), about 3.0 cM distal from the breakpoint in translocation stock T2-7a (5).

The recessive allele, ddt1.a, confers resistance to the insecticide DDT. After spraying seedlings at the 2- to 3-leaf stage with a concentration of 1 part per 500 in water, susceptible plants show severe chlorosis followed by yellowing and death about 10 days. A second application about 7 days after the first will insure complete kill of susceptible seedlings. The DDT solution affects only the leaf it comes in contact with it; thus, plants can be classified for reaction to DDT about anthesis by dipping a single leaf into the DDT solution. The part of the leaf blade covered by solution on susceptible plants will turn yellow and die, whereas it remains green on resistant plants (1, 2, 7). The frequency DDT susceptibility in collections is about 10%, nearly 40% in two-rowed entries and 1% in six-rowed ones (7).

Spontaneous occurrence in several commercial cultivars (2, 6, 7).

ddt1.a in Spartan (CIho 5027) (7).
Mutant used for description and seed stocks:
ddt1.a in Spartan (GSHO 331).

1. Griffiths, D.J., and J.D. Hayes. 1959. Rapid tests for varietal purity. Agricultural Merchant 39 (No. 9):74-76.
2. Hayes, J.D. 1959. Varietal resistance to spray damage in barley. Nature, London 183:551-552.
3. Hayes, J.D., and M.S. Rana. 1966. Investigations on genetic resistance to chemicals in spring barley. Welsh Plant Breeding Station, Aberystwyth, Report for 1965:47-48.
4. Hockett, E.A., and R.F. Eslick. 1969. Genetic male-sterile genes useful in hybrid seed production. p. 298-307. In R.A. Nilan (ed.) Barley Genet. II. Proc. Second Int. Barley Genet. Symp., Pullman, WA, 1969. Washington State Univ. Press, Pullman.
5. Ramage, R.T., M. Paluska, and G.A. Wiebe. 1973. Genetics and cytology of the translocation T2-7a. BGN 3:47-49.
6. Wiebe, G.A. 1960. A proposal for hybrid barley. Agron. J. 52:181-182.
7. Wiebe, G.A., and J.D. Hayes. 1960. The role of genetics in the use of agricultural chemicals. Agron. J. 52:685-686.

R.T. Ramage. 1984. BGN 14:95.

J.D. Franckowiak. 1997. BGN 26:266.

Stock number: BGS 319
Locus name: Reaction to Puccinia graminis 4 (wheat stem rust)
Locus symbol: rpg4

Previous nomenclature and gene symbolization:

None.

Monofactorial recessive (3, 4).
Located in chromosome 5HL [7L], in central part of 5HL about 4.9 cM distal from RFLP marker MWG740 (1).

The rpg4.d gene confers low infection types to pathotypes QCC and MCC of the wheat stem rust pathogen (Puccinia graminis f sp tritici ) at the seedling stage under low incubation temperatures 18 to 22^oC (3, 4). This gene is ineffective (exhibits compatible infection types) against some pathotypes at incubation temperatures greater than 27^oC. At the adult plant stage, the rpg4.d allele confers a moderate to high level of resistance to pathotype QCC (2). The rpg4.d gene confers a dominant resistant reaction to Puccinia graminis f sp secalis (5).

Natural occurrence in Q21861 (PI 584766) from Centro Internacional de Mejormiento de Maize y Trigo (ICARDA-CIMMYT barley breeding program) and identified by Dill-Macky and Rees at Toowoomba, Australia, but its pedigree cannot be traced (3).

rpg4.d in Q21861 (3).
Mutant used for description and seed stocks:
rpg4.d in Q21861 (GSHO 2438).

1. Borovkova, I.G., B.J. Steffenson, Y. Jin, J.B. Rasmussen, A. Kilian, A. Kleinhofs, B.G. Rossnagel, and K.N. Kao. 1995. Identification of molecular markers linked to the stem rust resistance gene rpg4 in barley. Phytopathology 85:181-185.
2. Jin, Y., B.J. Steffenson, and T.G. Fetch, Jr. 1994. Sources of resistance to pathotype QCC of Puccinia graminis f. sp. tritici in barley. Crop Sci. 34:285-288.
3. Jin, Y., B.J. Steffenson, and J.D. Miller. 1994. Inheritance of resistance to pathotypes QCC and MCC of Puccinia graminis f. sp. tritici in barley line Q21861 and temperature effects on the expression of resistance. Phytopathology 84:452-455.
4. Steffenson, B.J., Y. Jin, B.G. Rossnagel, and K. Kao. 1995. Genetics of multiple disease resistance in a doubled haploid population of barley. Plant Breed. 114:50-54.
5. Sun, Y., B.J. Steffenson, and Y. Jin. 1996. Genetics of resistance to Puccinia graminis f. sp. secalis in barley line Q21861. Phytopathology 86:1299-1302.

Y. Jin and B.J. Steffenson. 1995. BGN 24:169.

B.J. Steffenson and J.D. Franckowiak. 1997. BGN 26:267.

Stock number: BGS 320
Locus name: Intermedium spike-b
Locus symbol: int-b

Previous nomenclature and gene symbolization:

None.

Monofactorial recessive (2, 3).
Located in chromosome 5HL [7L], near the raw1 (smooth awn 1) locus based on linkage drag (1).

The spike appears similar to the six-rowed spike, but developmental irregularities occur commonly in the lower portion of the spike. All lateral spikelets are reduced in size, and the lemma awn is short or reduced to a pointed tip. Commonly, only lateral spikelets in the middle of the spike set seed (2, 5). Mutant plants have reduced vigor and tillering.

A neutron induced mutant in Bonus (PI 189763) (5).

int-b.3, -b.6 in Bonus (2, 5); int-b.75 in Bonus (4).
Mutant used for description and seed stocks:
int-b.3 in Bonus (GSHO 1764); int-b.3 in Bowman (PI 483237)*6 (GSHO 2129).

1. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.
2. Gustafsson, Å., and U. Lundqvist. 1980. Hexastichon and intermedium mutants in barley. Hereditas 92:229-236.
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).
5. Lundqvist, U., and A. Lundqvist. 1988. Induced intermedium mutants in barley: origin, morphology and inheritance. Hereditas 108:13-26.

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:268.

Stock number: BGS 321
Locus name: Short rachilla hair
Locus symbol: srh

Previous nomenclature and gene symbolization:

Short rachilla hairs = l (2, 4).
Short-haired rachilla = s (7).

Monofactorial recessive (1, 3, 9).
Located in chromosome 5HL [7L] (6, 8), about 26.8 cM proximal from the raw1 (smooth awn 1) locus (5, 7, 8).

Long rachilla hairs are unicellular, while short rachilla hairs are multicellar and branched (10). Short rachilla hair is associated with short pubescence on the glumes and rachis (2, 3, 4).

Natural occurrence in some two-rowed cultivars of European origin and in Lion (CIho 923) (4).

srh1.a in Lion (2, 3); srh1.a in Plumage (CIho 2511) (3, 7).
Mutant used for description and seed stocks:
srh1.a in Lion (GSHO 27); srh1.a in Bowman (PI 483237)*7 (GSHO 2108).

1. Biffen, R.H. 1907. The hybridization of barleys. III. J. Agric. Sci. 2:183-206.
2. Buckley, G.F.H. 1930. Inheritance in barley with special reference to the color of the caryopsis and lemma. Sci. Agric. 10:460-492.
3. Engledow, F.L. 1920. Inheritance in barley. I. The lateral florets and rachilla. J. Genet. 10:93-108.
4. Hor, K.S. 1924. Interrelations of genetic factors in barley. Genetics 9:151-180.
5. Jensen, J. 1981. Construction of a barley chromosome 7 linkage map. p. 927-939. 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.
6. Ramage, R.T., and C.A. Suneson. 1961. Translocation-gene linkages on barley chromosome 7. Crop Sci. 1:319-320.
7. 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.
8. Robertson, D.W., G.A. Wiebe, and R.G. Shands. 1955. A summary of linkage studies in barley: Supplement II, 1947-1953. Agron. J. 47:418-425.
9. Ubisch, G. von. 1916. Beitrag zu einer Faktorenanalyse von Gerste. Z. Indukt. Abstammungs. Vererbungsl. 17:120-152.
10. Ziegler, A. 1920. Variationen in der Form der Basalborste. Missbildungen und Abänderungen am Typus und deren Vererbung. I11. Landw. Z. 40:237-238.

T.E. Haus. 1978. BGN 8:160 as BGS 312, Short-haired rachilla, s.

J.D. Franckowiak. 1997. BGN 26:269.

Stock number: BGS 322
Locus name: Dusky
Locus symbol: dsk

Previous nomenclature and gene symbolization:

None.

Monofactorial recessive (3).
Located in chromosome 5HL [7L] (3), about 17.6 cM distal from the srh (short rachilla hair) locus and 7.8 cM proximal from the raw1 (smooth awn 1) locus (1, 2).

After heading, leaves begin to dehydrate and turn a dusky, olive-gray, color. Many, small dark spots occur scattered over the surface of the olive-gray plant parts. Even after maturity, spikes and culms remain faint green in color (3). Bowman backcross-derived plants grown in the greenhouse are about 2/3 normal height and moisture stress causes lower leaves to die rapidly without loss of green pigments. Anthers are pale green instead of yellow at anthesis.

A gamma-ray induced mutant in Chikurin Ibaraki 1 (OUJ069, CIho 7370) isolated by A Yamashita (3).

dsk1.a in Chikurin Ibaragi 1 (OUM299) (2, 3).
Mutant used for description and seed stocks:
dsk1.a in Chikurin Ibaragi 1 (GSHO 1714); dsk1.a in Bowman (PI 483237)*3 (GSHO 2120).

1. Hayashi, J., T. Konishi, I. Moriya, and R. Takahashi. 1984. Inheritance and linkage studies in barley. VI. Ten mutant genes located on chromosomes 1 to 7, except 3. Ber. Ohara Inst. landw. Biol., Okayama Univ. 18:227-250.
2. Hayashi, J., I. Moriya, and R. Takahashi. 1983. A further study on linkage of the "dusky" mutant, dsk. BGN 13:42-44.
3. Takahashi, R., J. Hayashi, and I. Moriya. 1972. New linkage data obtained in 1971. BGN 2:74-76.

J.D. Franckowiak and T. Konishi. 1997. BGN 26:270.

Stock number: BGS 323
Locus name: Narrow leafed dwarf
Locus symbol: nld

Previous nomenclature and gene symbolization:

None.

Monofactorial recessive (4).
Located in chromosome 5HL [7L] (2, 4, 5), about 21.6 cM proximal from the fst1 (fragile stem 1) locus (1).

Mutant plants have narrow, dark green leaves, which are erect with well developed midribs. Auricles degenerate to tiny projections, but ligules are normal. Stem internodes are short, and the upper ones are curved. Spikelets are relatively narrow and small, and seed set may be low (3). Plants are short (less than 1/2 normal height), the spike commonly emerges from the side of the sheath before anthesis, and kernels are thin.

A spontaneous mutant in the F₂ population of the cross Nagaoka (OUJ025) X Marumi 16 (OUJ007) isolated as "Nagaoka Dwarf" (3).

nld1.a in Nagaoka dwarf (OUL054) (3, 4, 5).
Mutant used for description and seed stocks:
nld1.a in Nagaoka dwarf (GSHO 769); nld1.a in Bowman (PI 483237)*7 (GSHO 2093).

1. Hayashi, J., I. Moriya, and R. Takahashi. 1983. A further study on linkage of the "dusky" mutant, dsk. BGN 13:42-44.
2. Shahla, A., and T. Tsuchiya. 1984. Telotrisomic analysis in triplo 7S in barley. BGN 14:52-53.
3. 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.
4. Takahashi, R., J. Hayashi, T. Konishi, and I. Moriya. 1972. Inheritance and linkage studies in barley. V. Locating seven new mutant genes. Ber. Ohara Inst. landw. Biol., Okayama Univ. 15:147-168.
5. Takahashi, R., J. Hayashi, and I. Moriya. 1971. Linkage studies in barley. BGN 1:51-58.

T. Konishi and J.D. Franckowiak 1997. BGN 26:271.

Stock number: BGS 324
Locus name: Curly dwarf 1
Locus symbol: cud1

Previous nomenclature and gene symbolization:

Curly dwarf = cud (3).

Monofactorial recessive (3).
Located in chromosome 5HL [7L] (3), about 14.4 cM proximal from the fst1 (fragile stem 1) locus (1, 2).

Most leaves are short and more or less twisted, and they often have a longitudinal crease. Culms are short (1/2 normal), the spike is compact, awns are short (1/3 normal length), and kernels are small and round (3).

An ethyl methanesulfonate induced mutant in Akashinriki (OUJ659, PI 467400) (3).

cud1.a in Akashinriki (OUM120) (2, 3).
Mutant used for description and seed stocks:
cud1.a in Akashinriki (GSHO 1711); cud1.a in Bowman (PI 483237)*6 (GSHO 2094).

1. Hayashi, J., T. Konishi, I. Moriya, and R. Takahashi. 1984. Inheritance and linkage studies in barley. VI. Ten mutant genes located on chromosomes 1 to 7, except 3. Ber. Ohara Inst. landw. Biol., Okayama Univ. 18:227-250.
2. Moriya, I., and R. Takahashi. 1980. Linkage studies of three barley mutants. BGN 10:47-51.
3. Takahashi, R., J. Hayashi, T. Konishi, and I. Moriya. 1975. Linkage analysis of barley mutants. BGN 5:56-60.

J.D. Franckowiak and T. Konishi. 1997. BGN 26:272.

Stock number: BGS 325
Locus name: Curly lateral
Locus symbol: crl

Previous nomenclature and gene symbolization:

Curly laterals = cu (3).
Curly laterals = cl (2).

Monofactorial recessive (2, 3).
Location is unknown; originally reported to be in 5HL [7L] over 30.4 cM distal from the raw1 (smooth awn 1) locus (2, 3), but linkage to the Rph12 (reaction to Puccinia hordei 12) locus was not found (1).

Awns on lateral spikelets are curly or wavy, and lateral spikelets may be malformed and partially sterile. Central spikelets may have a twisted awn occasionally. The curly lateral trait is not expressed in all tillers (2).The crl1.a gene is expressed better in six-rowed spikes. In the Bowman backcross-derived line, awns seem thinner and the awn of a few spikelets is bent at an odd angle.

A gamma-ray induced mutant in Montcalm (CIho 7149) (2).

crl1.a in Montcalm (Alb Acc 305) (2).
Mutant used for description and seed stocks:
crl1.a in Montcalm (GSHO 1211); crl1.a in Bowman (PI 483237)*3 (GSHO 2146).

1. Jin, Y., and J.D. Franckowiak. (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.R., K. Kasha, and R.A. Miller. 1958. Recombination studies in barley. Proc. Genet. Soc. Can. 3:41-43.

J.D. Franckowiak. 1997. BGN 26:273.

Stock number: BGS 326
Locus name: Broad leaf 1
Locus symbol: blf1

Previous nomenclature and gene symbolization:

Bredbladig = bb (3).
Latifolium (1).
Broad leaf = bb (2).

Monofactorial recessive (1, 3).
Located in chromosome 5HL [7L], about 20.6 cM proximal from the srh (short rachilla hair) locus (3).

Plants are somewhat lighter green than normal. All leaf blades are very broad, about twice normal width, and markedly crinkled, especially at the margins (3).

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

blf1.a in Bonus (Alb Acc 55) (3).
Mutant used for description and seed stocks:
blf1.a in Bonus (GSHO 1393).

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. 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.
3. 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.

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:274.

Stock number: BGS 327
Locus name: Extra floret-b
Locus symbol: flo-b

Previous nomenclature and gene symbolization:

None.

Monofactorial recessive (2, 3).
Located in chromosome 5HL [7L] (3), near the raw1 (smooth awn 1) locus based on linkage drag (1).

Extra bracts develop occasionally at the base of the central spikelet on the abaxial side. Formation of the extra bracts is most common in the central portion of the spike, but rarely will the bracts form another spikelet.

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

flo-b.3 in Foma (3).
Mutant used for description and seed stocks:
flo-b.3 in Foma (GSHO 1742); flo-b.3 in Bowman (PI 483237)*6 (GSHO 2128).

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

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:275.

Stock number: BGS 328
Locus name: Breviaristatum-e
Locus symbol: ari-e

Previous nomenclature and gene symbolization:

Breviaristatum-1 = ari-1 (3, 4).
Short awn 9 = lk9 (13).
Golden Promise erectoides = GPert (12).

Monofactorial recessive (3).
Located in chromosome 5HL [7L] (7, 8, 9, 12), about 5.6 cM proximal from the cer-zj (eceriferum-zj) locus (10, 11).

Awns are about 2/3 normal length, plants are 3/4 to 5/6 normal height, and kernels are smaller (4, 12). Awns and spikes are more erect than those of normal sibs (2). Mutant alleles at the ari-e locus are associated with salt tolerance, lower accumulation of Na⁺ (1, 6), and show relative insensitivity to GA₃ (6).

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

ari-e.1 in Bonus (4); ari-e.30, -e.39 in Bonus (5); ari-e.119, -e.156 in Foma (CIho 11333) (4); ari-e.166, -e.178, -e.222 in Foma (5); ari-e.228 in Foma (4); ari-e.GP (Golden Promise, PI 343079) in Maythorpe (PI 260893) (1, 2).
Mutant used for description and seed stocks:
ari-e.1 in Bonus (GSHO 1653); ari-e.GP in Maythorpe (GSHO 1733); ari-e.1 in Bowman (PI 483237)*7 (GSHO 2104); ari-e.GP in Bowman*7 (GSHO 2105).

1. Forster, B.P., H. Pakniyat, M. Macaulay, W. Matheson, M.S. Phillips, W.T.B. Thomas, and W. Powell. 1994. Variation in the leaf sodium content of the Hordeum vulgare (barley) cultivar Maythorpe and its derived mutant c.v. Golden Promise. Heredity 73:249-253.
2. Franckowiak, J.D. 1992. Allelism tests among selected semidwarf barleys. BGN 21:17-23.
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. Kucera, J., U. Lundqvist, and Å. Gustafsson. 1975. Inheritance of breviaristatum mutants in barley. Hereditas 80:263-278.
5. Lundqvist, U. (unpublished).
6. Pakniyat, H., E. Baird, W.T.B. Thomas, P.D.S. Caligari, W. Powell, and B.P. Forster. 1996. Effect of semi-dwarf mutants on salt tolerance in barley. p. 660-661. In A.E. Slinkard, G.J. Scoles, and B.G. Rossnagel (eds.) Proc. Fifth Int. Oat Conf. & Seventh Int. Barley Genet. Symp., Saskatoon. Univ. of Saskatchewan, Saskatoon.
7. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley I. Hereditas 62:25-96.
8. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley II. Hereditas 63:1-28.
9. Persson, G., and A. Hagberg. 1965. Localization of nine induced mutations in the barley chromosomes. Barley Newsl. 8:52-54.
10. Søgaard, B. 1974. Three-point tests on chromosome 1 and 7. BGN 4:70-73.
11. Søgaard, B. 1977. The localization of eceriferum loci in barley. IV. Three point tests of genes on chromosome 7 in barley. Carlsberg Res. Commun. 42:35-43.
12. Thomas, W.B.T., W. Powell, and W. Wood. 1984. The chromosomal location of the dwarfing gene present in Golden Promise. Heredity 53:177-183.
13. Tsuchiya, T. 1974. Allelic relationships of genes for short-awned mutants in barley. BGN 4:80-81

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:276.

Stock number: BGS 329
Locus name: Breviaristatum-h
Locus symbol: ari-h

Previous nomenclature and gene symbolization:

Breviaristatum-127 = ari-127 (2, 3).
Short awn 11 = lk11 (4).

Monofactorial recessive (3).
Located in chromosome 5HL [7L] (1), very close to the raw1 (smooth awn 1) locus based on linkage drag (1).

Awns are about 3/4 normal length, but plant height is normal (3).

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

ari-h.127 in Foma (3).
Mutant used for description and seed stocks:
ari-h.127 in Foma (GSHO 1656); ari-h.127 in Bowman (PI 483237)*6 (GSHO 2125).

1. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.
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. Kucera, J., U. Lundqvist, and Å. Gustafsson. 1975. Inheritance of breviaristatum mutants in barley. Hereditas 80:263-278.
4. Tsuchiya, T. 1974. Allelic relationships of genes for short-awned mutants in barley. BGN 4:80-81.

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:277.

Stock number: BGS 330
Locus name: Erectoides-g
Locus symbol: ert-g

Previous nomenclature and gene symbolization:

Erectoides-24 = ert-24 (1).
Brachytic 3 = br3 (10).

Monofactorial recessive (1, 5).
Located in chromosome 5HL [7L] (2, 3, 4, 5), about 4.7 cM proximal from the cer-i (eceriferum-i) locus (6, 7), and about 3.1 cM distal from the lax-a (laxatum-a) locus (5, 8).

Compact spikes are caused by reduced rachis internode length, with values from 2.1 to 2.4 mm (5). Awns and lateral spikelets are closely pressed to the spike, the upper part of the straw is spirally twisted, anthers are short and thick, and the ligule is small. Spikes tend to have a whitish color at maturity caused by a dense surface wax covering (5). GA₃ treatment of plants as the flag leaf emerges decreases spike density (9). Plants are about 2/3 normal height, have a brachytic-like appearance, and may show reduced seed set.

An X-ray induced mutant in Bonus (PI 189763) (1).

ert-g.24, -g.80, -g.84, -g.90 in Bonus (1); ert-g.78 (GSHO 480), -g.92 in Bonus (2); ert-g.303, -g.349, -g.359, -g.393 in Foma (CIho 11333) (5).
Mutant used for description and seed stocks:
ert-g.24 in Bonus (GSHO 479); ert-g.24 in Bowman (PI 483237)*8 (GSHO 2106).

1. Hagberg, A., Å. Gustafsson, and L. Ehrenberg. 1958. Sparsely contra densely ionizing radiations and the origin of erectoid mutants in barley. Hereditas 44:523-530.
2. Hagberg, A., G. Persson, and A. Wiberg. 1963. Induced mutations in the improvement of self-pollinated crops. p. 105-124. In E. Åkerberg and A. Hagberg (eds.) Recent Plant Breeding Research. Svalöf 1946-1961. Almqvist & Wiksell, Stockholm.
3. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley I. Hereditas 62:25-96.
4. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley II. Hereditas 63:1-28.
5. Persson, G., and A. Hagberg. 1969. Induced variation in a quantitative character in barley. Morphology and cytogenetics of erectoides mutants. Hereditas 61:115-178.
6. Søgaard, B. 1971. Linkage studies on eceriferum mutants in barley. BGN 1:41-47.
7. Søgaard, B. 1974. Three-point tests on chromosome 1 and 7. BGN 4:70-73.
8. Søgaard, B. 1977. The localization of eceriferum loci in barley. IV. Three point tests of genes on chromosome 7 in barley. Carlsberg Res. Commun. 42:35-43.
9. Stoy, V., and A. Hagberg. 1967. Effects of growth regulators on ear density mutants in barley. Hereditas 58:359-384.
10. Tsuchiya, T. 1976. Allelism testing of genes between brachytic and erectoides mutants. BGN 6:79-81.

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:278.

Stock number: BGS 331
Locus name: Erectoides-n
Locus symbol: ert-n

Previous nomenclature and gene symbolization:

Erectoides-51 = ert-51 (1).

Monofactorial recessive (1, 6).
Located in chromosome 5HL [7L] (2, 4, 6), very close to the ert-g (erectoides-g) locus (5, 6), and about 4.8 cM proximal from the cer-zj (eceriferum-zj) locus (7, 8).

Semicompact spikes occur because rachis internode length is reduced. Rachis internode length values vary from 1.9 to 2.4 mm (6). Mutant lines are about 3/4 normal height. The spike has enlarged lateral spikelets that have a pointed or awnletted tip, and plants show partial sterility not associated with a translocation. Spikes tend to have a whitish color at maturity (6). GA₃ treatment of plants as the flag leaf emerges decreases spike density (9). In the Bowman backcross-derived line, plants homozygous for the ert-n.51 gene produce few tillers and mature later than normal sibs.

An X-ray induced mutant in Bonus (PI 189763) (1).

ert-n.51 in Bonus (1); ert-n.61, -n.63 in Bonus (2); ert-n.133, -n.135 in Bonus (6); ert-n.325, -n.419 in Foma (CIho 11333) (3); ert-n.409, -n.464 in Foma (6).
Mutant used for description and seed stocks:
ert-n.51 in Bonus (GSHO 488); ert-n.51 in Bowman (PI 483237)*3 (GSHO 2107).

1. Hagberg, A., Å. Gustafsson, and L. Ehrenberg. 1958. Sparsely contra densely ionizing radiations and the origin of erectoid mutants in barley. Hereditas 44:523-530.
2. Hagberg, A., G. Persson, and A. Wiberg. 1963. Induced mutations in the improvement of self-pollinated crops. p. 105-124. In E. Åkerberg and A. Hagberg (eds.) Recent Plant Breeding Research. Svalöf 1946-1961. Almqvist & Wiksell, Stockholm.
3. Lundqvist, U. (unpublished).
4. Persson, G. 1969. An attempt to find suitable genetic markers for the dense ear loci in barley I. Hereditas 62:25-96.
5. Persson, G., and A. Hagberg. 1962. Linkage studies with the erectoides loci. Barley Newsl. 5:46-47.
6. Persson, G., and A. Hagberg. 1969. Induced variation in a quantitative character in barley. Morphology and cytogenetics of erectoides mutants. Hereditas 61:115-178.
7. Søgaard, B. 1974. Three-point tests on chromosome 1 and 7. BGN 4:70-73.
8. Søgaard, B. 1977. The localization of eceriferum loci in barley. IV. Three point tests of genes on chromosome 7 in barley. Carlsberg Res. Commun. 42:35-43.
9. Stoy, V., and A. Hagberg. 1967. Effects of growth regulators on ear density mutants in barley. Hereditas 58:359-384.

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:279.

Stock number: BGS 332
Locus name: Erectoides-r
Locus symbol: Ert-r

Previous nomenclature and gene symbolization:

Erectoides-52 = ert-52 (1).

Monofactorial incomplete dominant (1).
Location is unknown.

Spikes are compact in heterozygotes and very compact in homozygotes, with rachis internode length values from 1.4 to 1.8 mm. Homozygotes are about 2/3 normal height with excellent vigor. The glumes associated with lateral spikelets are 3 to 4 times larger than normal. Lodicule size is reduced (4). Heterozygotes are intermediate in plant height, have slightly more lax spikes, and have normal glumes in lateral spikelets (4). GA₃ treatment of plants as the flag leaf emerges decreases spike density (5).

A neutron induced mutant in Bonus (PI 189763) (1).

Ert-r.52, -r.67 in Bonus, -r.329 in Foma (CIho 11333) (4); Ert-r.453 in Foma (3).
Mutant used for description and seed stocks:
Ert-r.52 in Bonus (GSHO 492); Ert-r.52 in Bowman (PI 483237)*8 (GSHO 2123).

1. Hagberg, A., Å. Gustafsson, and L. Ehrenberg. 1958. Sparsely contra densely ionizing radiations and the origin of erectoid mutants in barley. Hereditas 44:523-530.
2. Hagberg, A., G. Persson, and A. Wiberg. 1963. Induced mutations in the improvement of self-pollinated crops. p. 105-124. In E. Åkerberg and A. Hagberg (eds.) Recent Plant Breeding Research. Svalöf 1946-1961. Almqvist & Wiksell, Stockholm.
3. Lundqvist, U. (unpublished).
4. Persson, G., and A. Hagberg. 1969. Induced variation in a quantitative character in barley. Morphology and cytogenetics of erectoides mutants. Hereditas 61:115-178.
5. Stoy, V., and A. Hagberg. 1967. Effects of growth regulators on ear density mutants in barley. Hereditas 58:359-384.

U. Lundqvist and J.D. Franckowiak. 1997. BGN 26:280.

Stock number: BGS 333
Locus name: Reaction to Puccinia hordei 12 (barley leaf rust)
Locus symbol: Rph12

Previous nomenclature and gene symbolization:

Resistance to Puccinia hordei Otth 9 = Pa9 (1).

Monofactorial dominant (1, 2).
Located in chromosome 5HL [7L] (2), about 26.1 cM distal from the raw1 (smooth awn 1) locus (2).

The seedling reaction type is 0; or a necrotic fleck (1, 2). Heterozygotes show an intermediate reaction to pathogenic isolates of Puccinia hordei (2).

Natural occurrence in Hordeum vulgare subsp spontaneum, but transferred to the cultivar Triumph (PI 268180) (1, 3).

Rph12.z in Triumph (1, 3).
Mutant used for description and seed stocks:
Rph12.z in Triumph (GSHO 1590); Rph12.z in Bowman (PI 483237)*4 (GSHO 2145).

1. Clifford, B.C. 1985. Barley leaf rust. p. 173-205. In W.R. Bushnell and A.P. Roelfs (eds.) The Cereal Rusts, Vol. II. Academic Press, New York.
2. Jin, Y., G.D. Statler, J.D. Franckowiak, and B.J. Steffenson. 1993. Linkage between leaf rust resistance genes and morphological markers in barley. Phytopathology 83:230-233.
3. Walther, U. 1987. Inheritance of resistance to Puccinia hordei Otth in the spring barley variety Trumpf. Cereal Rusts Powdery Mildews Bull. 15:20-26.

J.D. Franckowiak and Y. Jin. 1997. BGN 26:281.

Stock number: BGS 334
Locus name: Smooth awn 6
Locus symbol: raw6

Previous nomenclature and gene symbolization:

Smooth awn 6 = r6 (2).

Monofactorial recessive (1).
Located in chromosome 5HL [7L], near the raw1 (smooth awn 1) locus based on linkage drag (2).

Plants have very fewer stigma hairs and seed set is greatly reduced. In the Bowman backcross-derived line, which contains the raw6.f and raw1.a genes, plants have very smooth awns and very few stigma hairs, and seed set is commonly less than 5%. Phenotypically, raw6.f plants closely resemble those produced by the raw5.e (smooth awn 5) gene. Recombination between the raw6.f and raw1.a genes is low because a recombinant was isolated only after several backcrosses to Bowman.

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

raw6.f in Glenn (1).
Mutant used for description and seed stocks:
raw6.f in Glenn (GSHO 2437); raw6.f in Bowman (PI 483237)*8 (GSHO 2134).

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

J.D. Franckowiak. 1997. BGN 26:282.

Stock number: BGS 335
Locus name: Male sterile genetic 49
Locus symbol: msg49

Previous nomenclature and gene symbolization:

Male sterile genetic jw = msg,,jw (3).

Monofactorial recessive (2, 3).
Located in chromosome 5HL [7L], about 10.4 cM from the raw1 (smooth awn 1) locus (1).

Selfing - none (3).
Outcrossing - Complete female fertility (3).
Stamens - anthers rudimentary, no stomium or filament elongation (3).

A spontaneous mutant in ND7369, a six-rowed selection from North Dakota State University, Fargo, North Dakota, USA (3).

msg49.jw in ND7369 (MSS528) (3).
Mutant used for description and seed stocks:
msg49.jw in ND7369 (GSHO 2402); msg49.jw in Bowman (PI 483237)*8 (GSHO 2141).

1. Franckowiak, J.D. 1991. Association of male sterility genes with a specific chromosome using multiple marker stocks. BGN 20:31-36.
2. Franckowiak, J.D. 1993. Identification of two additional loci that control genetic male sterility in barley. BGN 22:10-11.
3. Hockett, E. A. 1988. New mutants in the genetic male sterile barley collection. BGN 18:70-73.

J.D. Franckowiak. 1997. BGN 26:283.

Stock number: BGS 336
Locus name: Globosum-b
Locus symbol: glo-b

Previous nomenclature and gene symbolization:

None.

Monofactorial recessive (1).
Located in chromosome 5HL [7L] (1, 4), over 31.9 cM proximal from the ari-e (breviaristaum-e) locus (5).

Kernels are globe-shaped, plants are stunted (2/3 normal height), and 1000-kernel weights are low (1, 4). Plants in the Bowman backcross-derived line have some brachytic traits (short culms, leaf blades, and awns) and slightly coiled leaves and awns.

An X-ray induced mutant in Villa (PI 399506) (1, 4).

glo-b.1001 (1345/72, GSHO 1327) in Villa, glo-b.1002 (916/65) in Donaria (PI 161974) (1, 4, 5); glo-b.1005 (859/74) in Villa (4, 5); glo-b.1007 (1296/65) in Donaria (1, 3); glo-b.1011 (1786/67) in Proctor (PI 280420) (3); glo-b.1012 (1055/74) in Villa (5).
Mutant used for description and seed stocks:
glo-b.1002 in Donaria (GSHO 1326); glo-b.1002 in Bowman (PI 483237)*7 (GSHO 2095).

1. Fischbeck, G., and H. Häuser. 1976. Research notes. BGN 6:28-29.
2. Häuser, H., and G. Fischbeck. 1979. Genetic analysis of some induced mutants. BGN 9:26-27.
3. Häuser, H., and G. Fischbeck. 1980. Genetic analysis of induced mutations. BGN 10:30-31.
4. Häuser, J., and G. Fischbeck. 1976. Untersuchungen zur Lokalisierung einiger Mutationen von Gerste (Hordeum sativum). Z. Pflanzenzücht. 77:269-280.
5. Häuser, J., A. Jahoor, and G. Fischbeck. 1988. Localization of induced mutants for globe shaped grains. BGN 18:54-58.

J.D. Franckowiak. 1997. BGN 26:284.

Stock number: BGS 337
Locus name: Broad leaf 2
Locus symbol: blf2

Previous nomenclature and gene symbolization:

Narrow leaf = nlh (2).
Broad leaf 2 = bb2 (4).
Narrow leaf-k = nl.k (1).

Monofactorial recessive (2).
Located in chromosome 5HL [7L], based on linkage drag with the raw1 (smooth awn 1) locus (1).

Leaf width of mutant plants is narrower (about 2/3 normal) than those of Hannchen (2, 3). Other plant characteristics appear normal.

A neutron induced mutant in Hannchen (CIho 531) (3).

blf2.b in Hannchen (2, 3, 4).
Mutant used for description and seed stocks:
blf2.b in Hannchen (GSHO 1667); blf2.b in Bowman (PI 483237)*6 (GSHO 2136).

1. Franckowiak, J.D. 1995. Notes on linkage drag in Bowman backcross derived lines of spring barley. BGN 24:63-70.
2. Ramage, R.T., and A.D. Day. 1960. A 10:3:3 ratio for leaf width in barley. Agron. J. 52:241.
3. Ramage, R.T., and B.J. Hoyle. 1957. Irradiated Hannchen barley. Barley Newsl. 1:19-20.
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.

J.D. Franckowiak. 1997. BGN 26:285.

Stock number: BGS 338
Locus name: High lysine 1
Locus symbol: lys1

Previous nomenclature and gene symbolization:

High lysine = lys (9).

Monofactorial recessive (9).
Located in chromosome 5HL [7L] (5, 6), about 10.8 cM distal from the srh (short rachilla hair) locus (2, 5, 6).

After the hard dough stage, kernels develop a depression in the center of the lemma which becomes progressively more distinct with maturity. The mature endosperm of the mutant appears to be harder than normal. The mutant expresses xenia permitting classification of kernels from heterozygous plants as normal or shrunken with an expected 3:1 ratio (9). Mutant plants have a higher lysine content in the endosperm than normal sibs (3, 7, 9). Field establishment and growth of mutant plants is normal, but grain yield is low (1, 10). Grain size and hordein protein content are reduced by the lys1.j gene (1, 3).

Natural occurrence in Hiproly (CIho 3947) (7, 8).

lys1.j in Hiproly (4, 5, 7).
Mutant used for description and seed stocks:
lys1.j in Hiproly (GSHO 1784); lys1.j in Bowman (PI 483237)*2 (GSHO 2115).

1. Balasaraswathi, R., B. Køie, and H. Doll. 1984. The concentration and yield of hordein and some lysine-rich proteins as influenced by the lys gene of Hiproly barley. Hereditas 100:225-231.
2. Jensen, J. 1981. Construction of a barley chromosome 7 linkage map. p. 927-939. 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.
3. Ingerversen, J., and B. Køie. 1971. Protein patterns of some high lysine barley lines. Hereditas 69:319-323.
4. Jensen, J., and H. Doll. 1979. Gene symbols for barley high-lysine mutants. BGN 9:33-37.
5. Karlsson, K.-E. 1972. Linkage studies on a gene for high lysine content in Hiproly barley. BGN 2:34-36.
6. Karlsson, K.-E. 1976. Linkage studies on the lys-gene in relation to some marker genes and translocations. p. 536-541. In H. Gaul (ed.) Barley Genetics III. Proc. Third Int. Barley Genet. Symp., Garching, 1975. Verlag Karl Thiemig, München.
7. Munck, L. 1972. High lysine barley - a summary of present research development in Sweden. BGN 2:54-59.
8. Munck, L., K-E. Karlsson, and A. Hagberg. 1971. Selection and characterization of a high-protein, high-lysine variety from the World Barley Collection. p. 544-558. In R.A. Nilan (ed.) Barley Genetics II. Proc. Second Int. Barley Genet. Symp., Pullman, WA, 1969. Washington State Univ. Press, Pullman.
9. Munck, L., K.-E. Karlsson, A. Hagberg, and B.O. Eggum. 1970. Gene for improved nutritional value in barley seed protein. Science 168:985-987.
10. Oram, R.N., and H. Doll. 1981 Yield improvement in high lysine barley. Aust. J. Agric. Res. 32:425-434.

J.D. Franckowiak. 1997. BGN 26:286.

Stock number: BGS 339
Locus name: High lysine 3
Locus symbol: lys3

Previous nomenclature and gene symbolization:

Shrunken endosperm xenia 3 = sex3 (14, 15).

Monofactorial recessive (3, 5, 14).
Located in chromosome 5HL [7L] (7, 11, 16), near the msg19 (male sterile genetic 19) locus (14), about 14.5 cM proximal from the fst1 (fragile stem 1) locus, and about 20.7 cM proximal from the ddt (reaction to DDT) locus (7, 9).

After the hard dough stage, kernels develop a depression in the dorsal side or lemma which becomes progressively more distinct with maturity. The 1000-kernel weight of the mutant is about 75% of normal. The mutant expresses xenia permitting classification of kernels from heterozygous plants as normal or shrunken with an expected 3:1 ratio (3). Field establishment and growth of mutant plants is normal (3, 5). Mutant kernels have a higher lysine content than normal kernels (3) and the association with shrunken endosperm is pleiotropic (11, 17). The endosperm is nearly devoid of all hordein polypeptides (6, 12, 13). A deficiency of kernels with shrunken endosperm occurs in some crosses (1, 2, 5, 14). The deficiency is caused by a linked factor for distorted male gamete transmission (4). The gamete lethal factor in Risø 1508 is named Gam3 (gametophyte factor 3) and is about 6.5 cM from the lys3 locus (17).

An induced mutant in Bomi (PI 43371) (3).

lys3.a in Bomi (Risø 1508) (3, 7); lys3.b (Risø 18), lys3.c (Risø 19) in Bomi (7, 10).
Mutant used for description and seed stocks:
lys3.a in Bomi (GSHO 1785).

1. Ahokas, H. 1979. Further results on the suppression of shrunken endosperm in high lysine mutants. BGN 9:3-7.
2. Ahokas, H. 1988. High-lysine gene segregation distorted in the barley cross Risø 1508 x Crypt CI 1090: Patterns of endosperm proteins by an electrophorectic method. Hereditas 108:129-131.
3. Doll, H. 1973. Inheritance of a high-lysine character of a barley mutant. Hereditas 74:293-294.
4. Doll, H. 1991. A factor on barley chromosome 7 causing distorted male segregation of gene lys3a. BGN 20:23-24.
5. Doll, H., and R. Oram. 1989. Deviating Mendelian segregation of barley gene lys3a. Hereditas 110:97-99.
6. Hopp, H.E., S.K. Rasmussen, and A. Brandt. 1983. Organization and transcription of B1 hordein genes in high lysine mutants of barley. Carlsberg Res. Commun. 48:201-216.
7. Jensen, J. 1979. Location of a high-lysine gene and the DDT-resistant gene on barley chromosome 7. Euphytica 28:47-56.

8. Jensen, J. 1979. Chromosomal location of one dominant and four recessive high-lysine genes in barley mutants. Vol. 1. p. 89-96. In Seed Protein Improvement in Cereals and Grain Legumes. Proc. Int. Symp., Neuherberg, Germany, 1978. Int. Atomic Energy Agency, Vienna.
9. Jensen, J. 1981. Construction of a barley chromosome 7 linkage map. p. 927-939. 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.
10. Jensen, J., and H. Doll. 1979. Gene symbols for barley high-lysine mutants. BGN 9:33-37.
11. Karlsson, K.-E. 1977. Linkage studies in a gene for high lysine content in Risø barley mutant 1508. BGN 7:40-41.
12. Kries, M., P.R. Shewry, B.G. Forde, S. Rahman, M.B. Bahramian, and B.J. Miflin. 1984. Molecular analysis of the effects of the lys3a gene on the expression of Hor loci in developing endosperms of barley (Hordeum vulgare L.). Biochem. Genet. 22:231-255.
13. Shewry, P.R., A.J. Faulks, and B.J. Miflin. 1980. Effect of high-lysine mutations on the protein fractions of barley grains. Biochem. Genet. 18:133-151.
14. Ullrich, S.E., and R.F. Eslick. 1977. Inheritance of the shrunken endosperm character, sex3c, of Bomi Risø mutant 1508 and its association with lysine content. BGN 7:66-73.
15. Ullrich, S.E., and R.F. Eslick. 1978. Chromosome location evidence for Risø induced high lysine shrunken endosperm mutants of barley. BGN 8:114-125.
16. Ullrich, S.E., and R.F. Eslick. 1978. Inheritance of the associated kernel characters, high lysine and shrunken endosperm, of the barley mutant Bomi, Risø 1508. Crop Sci. 18:828-831.
17. Yamae, G., and T. Konishi. 1993. Distorted segregation of the lys3a mutant in barley kernels. BGN 22:68-70.

J.D. Franckowiak. 1997. BGN 26:287-288.

Stock number: BGS 340
Locus name: Smooth awn 2
Locus symbol: raw2

Previous nomenclature and gene symbolization:

Smooth awn 2 = r₁ (4).
Smooth awn 2 = r2 (1).

Monofactorial recessive (1), segregation ratios obtained from studies of rough vs smooth awn may be distorted because the raw2 locus is linked to the raw1 (smooth awn 1) locus (2).
Located in chromosome 5HL [7L] (1), about 26.0 cM (probably distal) from the raw1 (smooth awn 1) locus (1).

The number of barbs present on the awn is reduced by the recessive allele at the raw2 locus (1, 3). When the recessive allele is present at only the raw2 locus, awns are intermediate or semi-rough (3). When recessive allele occur at both the raw2 and raw1 loci, awns are very smooth or devoid of barbs. The existence of two or more genes controlling barbing of awns in Lion is reported in several studies (4, 5, 7).

Natural occurrence in Lion (CIho 923) and probably spring two-rowed cultivars from Europe with a semi-rough awn.

raw2.b in Lion as observed in Mich 832-188 (1, 6).
Mutant used for description and seed stocks:
raw2.b in Lion (GSHO 27).

1. Atkins, R.E., and K.J. Frey. 1957. Inheritance of awn barbing in two barley crosses. Agron J. 49:558-560.
2. Franckowiak, J.D. 1991. Association of male sterility genes with a specific chromosome using multiple marker stocks. BGN 20:31-36.
3. Friesen, H.A. 1946. Awn-barbing in barley. Canad. Jour. Res. C. 24:292-297.
4. Griffee, F. 1925. Correlated inheritance of botanical characters in barley and manner of reaction to Helminthosporium sativum. J. Agric. Res. 30:915-935.
5. Robertson, D.W., G.W. Deming, and D. Koonce. 1932. Inheritance in barley. J. Agric. Res. 44:445-466.
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. Sigfusson, S.J. 1929. Correlated inheritance of glume color, barbing of awns and length of rachilla hairs in barley. Sci. Agric. 9:662-674.

J.D. Franckowiak. 1997. BGN 26:289.

Stock number: BGS 341
Locus name: Albino seedling 12
Locus symbol: abo12

Previous nomenclature and gene symbolization:

Albino seedling c = alb,,c (1).
Albino seedling o = alb,,o (2).

Monofactorial recessive (1, 2).
Located in chromosome 5HS [7S], over 26.1 cM distal from the msg16 (male sterile genetic 16) locus, and not linked to the msg19 (male sterile genetic 19) locus (2).

Seedlings have a white color and die at the two to three leaf stage (1). The abo12.o gene must be maintained as a heterozygous stock.

A spontaneous mutant in Titan (CIho 7055) (1).

abo12.o in Titan (1, 2).
Mutant used for description and seed stocks:
abo12.o in Titan (GSHO 583).

1. Rahman, M.M. 1973. Balanced male sterile-lethals systems for hybrid barley production. Ph.D. Thesis. Montana State Univ., Bozeman.
2. Rahman, M.M., and R.F. Eslick. 1976. Linkage of spontaneous mutant seedling lethal genes with genetic male sterile genes. BGN 6:53-58.

J.D. Franckowiak. 1997. BGN 26:290.

Stock number: BGS 342
Locus name: Globosum-f
Locus symbol: glo-f

Previous nomenclature and gene symbolization:

Globosum-e = glo-e (1).

Monofactorial recessive (1).
Located in chromosome 5HL [7L] (1).

Mutant plants are much shorter than the mother cultivar and produce small kernels that are short and round or globe-shaped. Seedlings have short first leaves and coleoptiles; glo-f.305 plants have a much shorter first leaf than glo-f.307 plants. Spikes are shorter than normal, but awn length is not reduced (2).

A N-methyl-N-nitrosurea induced mutant in Damazy (2).

glo-f.305 in Damazy (D7305a, 4704), glo-f.307 in Damazy (D7307, 4979) (1, 2).
Mutant used for description and seed stocks:
glo-f.305 in Damazy (D7305a, 4704).

1. Häuser, J., A. Jahoor, and G. Fischbeck. 1988. Localization of induced mutants for globe shaped grains. BGN 18:54-58.
2. Sodkiewicz, T., and A.G. Gorney. 1982. Barley mutants with long-shaped and globe-shaped grains. BGN 12:4-7.

G. Fischbeck and J.D. Franckowiak. 1997. BGN 26:291.