Mutations induced by gamma irradiation ethyl methanesulfonate and hydrazine hydrate in mung bean phaseolus aureus
Botanical Bulletin of Academia Sinica 25(1): 103-110
Mutations induced by gamma rays, ethyl methane sulfonate (EMS) and hydrazine hydrate (HZ) were evaluated on days to flowering, number of fertile branches and number of pods in the M1, M2 and M3 generations. These characters exhibited increase in variance as well as in mean values, with the few exceptions in the M1 generation. Analysis of M2 and M3 data revealed that there was a significant increase in mean values for all the characters. Coefficient of phenotypic variability increased in both the generations. The highest genotypic coefficient of variation and values of heritability were recorded in the M3 generation as compared to M2. Estimates of heritability were high for number of pods followed by days to flowering and then number of fertile branches. Days to flowering and number of pods showed the highest values of genetic advance in the M3 generation. Mutagenic treatments increased the phenotypic and genotypic coefficient of variation as well as heritability and genetic advance. This suggests that the further improvement of this variety of mung bean is possible through induced mutagenesis.