A Database for Triticeae and Avena
The mutant gene cu4 for curly 4 (spiral) in KM118 was induced with
irradiation by Tsuchiya in 1962. The detailed characteristics and adapted
symbol (cu4) were reported by Tsuchiya (1974, 1984a,b). Previous
investigations designed to associate the gene with a barley linkage group
showed that the gene is not associated with chromosome 1, 3, 4, 5, or 6
(Furst, 1983; Hwang and Tsuchiya, 1988). Additional information with
primary trisomic analysis with chromosome 7 is shown in Table 1.
The data from Table 1 showed that there were six mutant homozygotes in 21
trisomics, which indicated the noncritical combination of the gene cu4
with Triplo 7. The gene cu4 is not located on chromosome 7.
Thus, the gene cu4 is most likely present on chromosome 2. Primary
trisomic analysis with Triplo 2 is underway.
Furst, E.C. 1983. Primary trisomic analysis of three mutant genes in
barley. M.S. Thesis, Colorado State University, CO.
Hwang, J.J., and T. Tsuchiya. 1988. Primary trisomic analysis of the
gene cu4 for curly 4 (spiral) mutant in KM118. BGN 18:18-20.
Tsuchiya, T. 1974. Root character of curly mutants in barley. BGN
Tsuchiya, T. 1984b. Curly 4, cu4. BGN 14:97.