GENETIC VARIABILITY AND ASSOCIATON STUDIES FOR ROOT INFECTION TO PIRIFORMOSPORA INDICA, NODULATION, YIELD AND ITS CONTRIBUTING TRAITS IN MUNGBEAN [VIGNA RADIATA (L.) WILCZEK]
Keywords:correlations, mungbean, nodulation, path coefficients, Piriformospora indica
A study was carried out in mungbean to estimate the nature and magnitude of genetic parameters for root infection to Piriformospora indica, nodulation, N and P uptake, seed yield and yield components. PCV was higher than GCV for all the characters indicating influence of environmental factors on their expression. High heritability accompanied with high genetic advance was observed for 100-seed weight, seed yield, plant height, pods/plant, branches/plant and N and P content in seeds. Seed yield exhibited positive correlation with pods/plant, branches/plant, 100-seed weight, nodules/plant, nodules dry weight, N content in shoot and seeds, P content in seeds and P. indica infection in roots. Nodulation exhibited positive correlation with nodules dry weight, shoot dry weight, N content in shoot and seeds, P content in seeds and seed yield. Number of pods/plant exerted the maximum positive direct effect on seed yield followed number of nodules/plant and number of branches/plant.