Frequency and spectrum of chlorophyll mutations in groundnut (Arachis hypogaea L.)

Using gamma rays, ethyl methane sulfonate and sodium azide, seven types of chlorophyll mutants viz., albino, xantha, chlorina, viridis, alboviridis, x anthoviridis and maculata were induced in two groundnut genotypes. The freq uencies were calculated as percent of M-2 seedlings. Based on the regressio n chlorophyll mutation frequencies increased with increased doses/concentra tions of mutagen, reached plateau and declined thereafter. Chlorophyll muta tion was dose dependent but independent to mutagenic treatments. In general , no significant differences were observed for mutagens and genotypes on in duction of chlorophyll mutations. A significant difference was observed bet ween doses and seven types of chlorophyll deficient mutants.