Genetics of Biochemical and physiological parameters responsible for powdery mildew disease resistance in Mungbean

A field experiment was carried out during four consecutive seasons i.e. kharif 2004, rabi 2004–05, kharif 2005 and rabi 2005–06 in randomized complete block design with three replications to investigate the genetics of biochemical and physiological parameters traits using 20 powdery mildew disease resistant genotypes along with two highly susceptible genotypes for the study of powdery mildew (Erysiphae polygoni DC) disease resistance in mungbean (Vigna radiata L. Wilczek). Estimation of genetic parameters for biochemical and physiological traits in powdery mildew resistant genotypes showed significant difference for all the biochemical and physiological parameters. Wide range of variation for almost all the characters was observed. Similarly, genotypic coefficient of variation was found high for total phenols, stomatal conductance and rate of transpiration. For other traits also appreciable amount of genotypic coefficient of variation was observed which might be used for any breeding programme. High heritability coupled with high genetic advance observed for total phenols, total sugar, total potassium and rate of transpiration indicating major role of additive genetic variance.