Abstract

                                Seed treatment of sesame cv.B67, with EMS, NG, Gamma rays, Gamma rays EMS and Gamma rays+ NG induced five types of chlorophyll mutations and 17 types of viable macro-mutations in M,. Chlorophyll mutation frequency was the highest in 900 Gy gamma rays for single mutagen treatments and in 700 Gy + 0.04% NG for combined treatments. Macro-mutational frequencies for single and combined treatments were the highest in 0.25% EMS and 700 Gy 0.02% NG, respectively. Relative difference in mutability of gene loci for chlorophyll and macro-mutations with respect to different mutagens were clearly observed.

Key words : Sesame, EMS, NG, Gamma rays, Chlorophyll mutations, Macro-mutations.