IV. 5. Coordinator's report: Chromosome 4.
T. E. Haus, Department of Agronomy, Colorado State University, Fort Collins, Colorado 80523 U.S.A.
Fischbeck and Häuser (3) confirm the association of glo-a with chromosome 4 by telotrisomic analysis. This character is difficult to identify in the greenhouse at Fort Collins.
Gymer (4) describes some interactions at the i locus in various two row/six row genotypes.
Seip and Tsuchiya (5) confirm the association of lg4 with Triplo 4 but found no association of zbc (presumed to be on chromosome 4) with Triplo 4. The Barley Genetic Stock Center at this time does not have a zb stock known to be located on chromosome 4.
Tsuchiya and Hall (6) reported that lg3 is located on the long arm of chromosome 4 (4L) by telotrisomic analysis. They also report the allelism of lk5 and ari-c2 and confirmed the association of lk5 with chromosome 4 by trisomic analysis. Telotrisomic analysis of lk5 indicates it is located on the long arm of chromosome 4.
Yasuda (7) has found an early maturing gene ea,,c associated with the K locus. This gene appears to be present in a number of early maturing cultivars of Chinese origin.
Finch (1,2) has described two additional genes for aleurone color, bl3 and bl4, which show association with each other and bl, previously located on chromosome 4.
References:
1. Finch, R.A. 1978. Non-blue (white) aleurone 3. BGN 8:165.
2. Finch, R.A. 1978. Non-blue (white) aleurone 4. BGN 8:166.
3. Fischbeck, G. and H. Häuser. 1978. Cytogenetic studies of some induced barley mutants. BGN 8:36-37.
4. Gymer, P.T. 1978. The genetics of the six row/two row character. BGN 8:44-46.
5. Seip, Lindy and T. Tsuchiya. 1978. Trisomic analysis of lg4 and zbc. BGN 8:86-89.
6. Tsuchiya, T. and L.B. Hall. 1978. Telotrisomic analysis of four mutant genes in barley. BGN 8:104-107.
7. Yasuda, S. 1978. An earliness gene involved in Chinese native cultivars. BGN 8:127-128.