II. 29. Telotrisomic analysis of the gene f8 (chlorina) in barley. (1)
A. Shahla and T. Tsuchiya, Department of Agronomy, Colorado State University, Fort Collins, Colorado 80523 U.S.A.
(1) Supported by USDA/SEA Competive Research Grant 82-CRCR-1-1020 and CSU Hatch Project.
Marker gene f8 (chlorina 8) was previously located on the long arm of chromosome 1 (1L) (Tsuchiya, 1972). Recently, when this gene was tested again with Triplo 1L (Table 1), the F2 segregation ratio did not fit to 3:1 disomic ratio, but 9 recessive homozygotes were recovered in trisomic portion suggesting the location of this gene on the opposite arm (1S).
When f8 was analyzed with Triplo 1S, the segregation ratio was trisomic (Table 1) with no homozygous recessives in the trisomic portion, indicating its association with the short arm of chromosome 1 (1S).
Reference:
Tsuchiya, T. 1972. Cytogenetics of the telocentric chromosome of the long arm of chromosome 1 in barley. Seiken Ziho 23:47-62.
