A Database for Triticeae and Avena
II. 28. Telotrisomic analysis of an incompletely dominant short awn
gene in barley.*
T. Tsuchiya and J. Fujigaki.** Department of Agronomy, Colorado State
University, Fort Collins, Colorado 80523, U.S.A.
* Supported in part by Research Grant No. 12-14-5001-265 and Competitive
Research Grant No. 5901-0410-9-0334-0 from USDA/SEA to the senior author.
** Visiting Associate Professor in Agronomy Department; leave of absence
from Tokyo University of Agriculture, Tokyo, Japan.
The primary and telotrisomic analysis has been carried out to associate
an incompletely dominant gene for short awn in an X-ray induced mutant
KM200. The mutant was induced in a cultivar Hakata Nigo (No. 2) (Tsuchiya,
1962). The results so far obtained are presented in Table 1.
Table 1. Results of primary and telotrisomic analysis
in trisomics x KM200, 1972-1978.
The results clearly indicated that the short-awned gene is not associated
with chromosome 1S, 2L, 3, 4, 5, 6 and 7 with obvious disomic segregating
ratio and the occurrence of an appreciable number of recessive homozygotes
in the trisomic portion of F2 generation.
In this note the result of telotrisomic analysis in Triplo 2S x KM200
Table 2. Results of telotrisomic analysis in Triplo
2S x KM200.
This result (Table 2) showed that the short-awned gene is not associated
with the short arm of chromosome 2 (2S). Trisomic analysis is now underway
for the suspected chromosome arm 1L.
Tsuchiya, T. 1962. Radiation breeding in two-rowed barley. Seiken Ziho
Tsuchiya, T. and R.L. Haines. 1975. BGN 5:67-70.
Tsuchiya, T. and L.B. Nall. 1978. BGN 8:104-107.
Tsuchiya. T. and R.J. Singh. 1972. BGN 2:99.
BGN 10 toc
BGN Main Index