II. 42. Association of the gene o for orange lemma with the short arm of chromosome 6 (6S) in barley. (1)
Azizeh Shahla, J. W. Shim(2) and T. Tsuchiya, Department of Agronomy, Colorado State University, Fort Collins, Colorado 80523, U.S.A.
(1) Supported by USDA/SEA Competitive Research Grants No. 5901-0410-9-0334-0 and 82-CRCR-1-1020 and USDA/SEA-CSU Cooperative Research Grant No. 58-9AHZ-2-265 to T. Tsuchiya.
(2) Visiting Professor, Leave of Absence from Seoul National University, Suewon, Korea.
Telotrisomic analysis was conducted in crosses of Triplo 6S (Seip, 1980; Singh and Tsuchiya, 1982) and orange lemma mutant (o) in barley. Three F2 populations were studied with the results shown in Table 1.
Table 1. F2 segregation of o in crosses of Triplo 6S and orange lemma (o).
The segregation of normal snd orange lemma in the total of three populations was 185:27 with x23:1 = 17.006 which deviates significantly from the disomic ratio of 3:1. Also there were no recessive homozygotes in a total of 73 trisomic plants. Based on these results, it seems safe to conclude that the gene o for orange lemma is associated with the short arm of chromosome 6 (6S) in barley.
References:
Seip, L. 1980. The telotrisomic for the short arm of chromosome 6 in
barley. M.S. Thesis, Colorado State University, Fort Collins, C0.
Singh, R. J. and T. Tsuchiya. 1982. Identification and designation of telocentric chromosomes in barley by means of Giemsa N-banding technique. Theor. Appl. Genet. 64:13-24.
