RADIATION INDUCED VARIATION IN PHASEOLUS VULGARIS L. FOR SEED YIELD TRAITS AND BIOTIC STRESS

Abstract

Significant within line and between lines variation was induced' for seed yield
under SkR, 10kR and 15kR doses of gamma-rays in M2 of 'Jawala' and 'HPR35'
varieties; and for biological yield, number of seeds and number of pods under
5kR and for seeds per pod under10KR in M2 of 'Jawala' variety. between
lines variation was also observed for seed yield under 20kR in M2 of 'Jawala'.
Within line and between lines, variation was induced for seed yield under 10kR,
and for plant height under 10kR and 15kR in M3 of 'Jawala;', However, within
line variation was also observed for seed yield under 5kR, 10kR and and 1SkR
in M3 of 'Jawala' whereas between lines, variation was induced for seed yield
under 5kR and for biological yield under 5kR and under 15kR in M3 of 'HPR3S'.
However, within line variation was also observed for harvest index, seeds per
pod, pod yield and pod length under 1SKR and for seeds per pod and pod
length under SkR in M3 of HPR 35, Mutants 128 (1OkR) of 'Jawala; and 232-1
(SkR), 236-2 and 238-1 (1OkR) and 208 (1SkR) of 'HPR 35' were found
moderately resistant against anthracnose (CollelOtrichum Hndemuthiarium) in M3
when tested 'under laboratory conditions. Mutants 32-1, 236-2, 238-1 and 208
(aU of 'HPR 35') also had higher seed yields than the parent 'HPR 35'.