Estimation of variability, heritability and genetic advance in M3 generation of natural mutant of dolichos bean

Abstract

An experiment entitled “Estimation of variability, heritability and genetic advance in M3 generation of natural mutant of dolichos bean” was carried out at All India Coordinated Research Project on Vegetable Crops, Mahatma Phule Krishi Vidyapeeth, Rahuri, Dist. Ahmednagar (MS), which was conducted during the year 2018-19 with an objective to assess the genetic variability in M3 generation. The estimates of phenotypic coefficient of variation were higher than that of genotypic coefficient of variation for all the characters under study in M3 generation. High GCV and PCV were observed for vine length, number of racemes per vine, fresh pod width, number of fresh pods per vine, fresh pod yield per vine, fresh pod yield per hectare, fresh seed yield per vine and dry seed yield per vine in M3 generation indicating the higher magnitude of variability and direct selection of these traits may be advantageous in developing desirable dolichos bean genotype. The high heritability along with high genetic advance as percent of mean are exhibited by vine length, days to 50 per cent flowering, number of racemes per vine, pod setting per cent, fresh pod length, fresh pod width, number of fresh pods per vine, fresh pod shelling per cent, fresh pod yield per vine, fresh pod yield per hectare, fresh 100 seed weight, fresh seed yield per vine, dry 100 seed weight and dry seed yield per vine in M3 generation. This indicates presence of additive gene action for the expression of these traits which is fixable for next generation and selection in next population based on this character would be ideal.