Nandini, RPRANESH2017-08-022017-08-022015-07-10Th-11062http://krishikosh.egranth.ac.in/handle/1/5810027153Bambara groundnut (Vigna subterranea (L.) Verdc.) is an autogamous legume crop cultivated by the resource poor farmers in the African continent. The present investigations were undertaken to study the Genetic variability, to determine the correlation and path coefficient in M3 generation of Bambara groundnut variety ‘SB-42’ treated with Ethyl Methane Sulphonate and screening for yellow mosaic virus (YMV) disease resistance using heterologous probes in M6 mutant lines irradiated with gamma rays was also undertaken during kharif 2014 in Department of Genetics and Plant Breeding, UAS, GKVK, Bengaluru. In M3 generation a positive shift in mean was observed for all traits except days to flowering and plant height. Number of branches plant-1 showed high phenotypic coefficient of variance (24.53) and genotypic coefficient of variance (24.22). Higher heritability coupled with high genetic advance percent of mean was observed for the number of branches plant-1, plant spread, number of pods plant-1, pod yield plant-1, seed yield plant-1 reveals the higher genetic gain under selection. The pod yield plant-1 (0.94**), number of pods plant-1 and plant height had significant correlation with seed yield plant-1. Pod yield plant-1 (1.05), shelling percentage, number of pods plant-1, plant spread, 100 seed weight and plant dry weight had higher positive direct effect on seed yield plant-1. The designed SSR primers for the RGA 1F-CG/RGA 1R sequence were unable to amplify M6 mutant lines indicating that all the lines lack resistant source and to use more markers to identify the resistance to YMV disease in Bambara groundnut.ennullThesis