IV.1. Barley chromosome 2.
G. W. R. Walker. Genetics Department, University of Alberta, Edmonton, Alberta, Canada.
Linkage orientation map. (For numerals in brackets, refer to text.)
1. Revisions of map since the report by Robertson (Barley Genetics II, 1970).
A. Loci deleted
(1) gs 7 (Tsuchiya, 1972, BGN 2:163)
(2) ine (Tsuchiya, 1972, BGN 2:163)
B. Locational changes
(3) Centromere: from gs 5 - wst 4 to f-gs 5
(telotrisomic analysis; Tsuchiya, 1972, BGN 2:193)
(4) lr from v to the right of v (a re-examination
of earlier data; Haus, 1972, BGN 2:203, indicates it should be 8 units
to the right of v)
C. Allelism established by allelism tests
(5) gs 8 (=cer-gs 8) and gs 5 (Takahashi
et al., 1970, BGN 1:51)
(6) v and 23 induced 6-row mutants, 16 of which are v-type
and 7'v'-type showing 'elongated pedicel and shortened awn' (Fukuyama
et al., 1972, BGN 2:25)
(7) gp 2 and gp (Matchett, 1968, Ph.D. Thesis, Colorado
State University; Matchett et al., 1971, Can. J. Genet. Cytol. 13:489-498;
Tsuchiya, 1971, BGN 1:62)
D. Loci added
(8) Ha (by Tsuchiya and Haus, 1972, BGN 2:163; data from Cotten
and Hayes, 1969, Heredity 24:593)
(9) Ha 2 (by Walker, 1973; data from Anderson, 1972, BGN 2:201)
2. Genes assigned to chromosome 2, but not to definite positions; since the report by Robertson (ibid)
A. Assigned by trisomic analysis (Takahashi and Hayashi, 1966, Ber.
Ohara Inst. Landw. Biol. 13:185)
(i) sk (no evidence of linkage with v, or)
B. Assigned and positioned re centromere by double-translocation test,
using T2-7d, T2-3f and V/v (Søgaard, 1971,
BGN 1:41; see also Persson, 1969, Hereditas 62:25)
(ii) cer-n: short arm, near centromere
(iii) cer-zm: short arm suggested, very close to centromere
(iv) cer-s, cer-v: long arm, near centromere
(v) cer-g: long arm, less than 16 units from centromere
