II.36 Trisomic analysis of nine mutant genes in barley.
T. Tsuchiya and R. L. Haines.* Department of Agronomy, Colorado State University, Fort Collins, Colorado 80523, USA.
*R. L. Haines is an undergraduate student in the Department of Zoology at Colorado State University. This work was conducted as a part of training in the course "Special Studies in Genetics" (AG 495C) in the Department of Agronomy, Colorado State University.
Four primary trisomic types (Triplo 3, 4, 5 and 6) and two telotrisomic types (Triplo 1L and Triplo 1S) were used. The trisomic stocks used are all in the S. E. 16 background. Nine mutant genes have been studied by means of trisomic analysis. Nine stocks used are shown in Table 1.
The gene for the mutant Angustifolia has incomplete dominance. Homozygote for the gene is very weak, small with extremely narrow and short leaves, and dies at 3 to 4 leaf stage. Heterozygote for the gene has narrower leaves, smaller spikes and kernels than normal and is rather vigorous with normal fertility.
The characteristics and genetic nature of other mutants have been reported by various workers (Table 1).
Table 1. Nine mutant stocks used in this trisomic analysis.
The results are shown in Table 2 and are summarized in Table 3.
Table 3. Summary of the results of trisomic analysis of nine mutant
The results are obvious for most of the cases. The association of Lf1 gene with the chromosome 1L or 4 is not conclusive.
References:
Fedak, G., T. Tsuchiya and S. B. Helgason. 1972. Can. J. Genet. Cytol. 14: 949-957.
Robertson, D. W., G. A. Wiebe and R. G. Shands. 1947. J. Amer. Soc. Agron. 39: 464-473.
Robertson, D. W., G. A. Wiebe, R. G. Shands, and A. Hagberg. 1965. Crop Sci. 5: 33-43.
Singh, R. J. and T. Tsuchiya. 1972. BGN 2: 99.
Tsuchiya, T. 1962. Seiken Ziho 14: 21-34.
Tsuchiya, T. 1969. Induced Mutations in Plants (Proc. Intern. Symp. Nature, Induction and Utilization of Mutations in Plants): 573-590.
Tsuchiya, T. 1974a. BGN 4: 80-81.
Tsuchiya, T. 1974b. BGN 4: 107-110.
Tsuchiya, T. 1975. BGN 5: 64-67.
