VARIABILITY STUDIES IN M3 GENERATION IN MUNG BEAN (VIgna radlata (L.) Wilczek)

Abstract

Variability Studies were performed for various yield and yield contributing characters in M3 generation in three varieties of mungbean (AKM-8802, PKV Green gold and AKM-4) by exposing to gamma rays. The 220 mutants isolated in M2 generation were assessed for 11 yield contributing characters. Out of 220 mutants only 28 lines showed true to type breeding behaviour in M3 generation. The PCV values were higher than GCV values for all the characters. The characters sprouting percentage, number of pods per plant, number of seeds per pod and 100 grain weight exhibited high GCV and PCV values. High estimates of heritability were recorded for few characters like sprouting percentage, number of pods per plant and plant height. High heritability values along with high estimates of genetic advance for theses characters indicated the presence of additive gene action and direct selection for such traits is rewarding in crop improvement. Apart from variability studies, variety and dose wise mean performance revealed treatment 250 Gy was more efficient and effective in AKM-8802 and AKM-4. And the treatment 350 Gy was found more efficient and effective in PKV Green gold, for various yield and yield contributing traits.