Linkage studies in rice ( Oryza sativa L.). On some mutants derived from chronic gamma irradiation

Thirteen of the mutant genes induced by gamma irradiation and neous mutant genes of rice were newly described and determined as follows: two o f the sponta-th ir linkage groups Group I; spotted leaf 4 (spl,). Group II; narrow leaf 1 (nal,), yellowish leaf margin (ylm) and round kernels 1 (rk,). Group I or III; semi-rolled leaf 2 (rZJ. Group IV; spotted leaf 5 (spl,). Group VI; neck leaf 2 (nla). Group VIII; zebra leaf 2 (zz) and tillering dwarf (d,, spontaneous).Group X; dwarf (dK_J, brittle culm 3 (bc, ) a n d gold hull 3 (gha). Group XI; fine culm and tillering (fc), spotted leaf 3 (spl,) and virescent 1 (vi, spontaneous)