Lentil germplasm comprising of six F 2 and twenty M 2 populations was evaluated under field conditions to estimate genetic variability with the help of genetic parameters. The cross AEL23/40 x Precoz among all other combinations had higher estimates of coefficients of variability (PCV= 7027.59%, GCV= 7006.67%) and highest values of heritability (99.70%) and genetic advance (142.99) for pods per plant. The same cross had highest values of coefficients of variability (PCV= 568.31%, GCV= 540.69%), heritability (95.14%) and genetic advance (183.45%) for seed yield. Overall, the variability was less in 100 seed weight as compared to other traits under study. In M2 population at 100 Gy, Masoor-85 exhibited greater than 50% GCV along with moderate value of genetic advance (30.33) for plant height. The genotypes 00518, 01512, 03501, Lentil black and Masoor 85 showed more than 50 % GCV, more than 90% heritability combined with moderate values of genetic advance for plant height at 150 Gy. Masoor-85 showed higher estimates of coefficients of variability (PCV= 4373.29%, GCV= 4235.51%), heritability (96.85%) and genetic advance (78.79%) followed by NL 96635 for pods/plant at 150 Gy . The ge notypes 01512, NL 96635 and NL 96475B showed more than 90% heritability and genotypic coefficients of variability for seed yield whereas for 100 seed weight, the genotype Lentil Black had highest value of genotypic coefficient of variation (14.72%) with he ritability of 93.04% combined with highest value of genetic advance (45.90%) among all the genotypes. In conclusion, crosses and mutant populations in both F 2 and M 2 populations showed greater genetic variability especially for pods/plant followed by seed yield and plant height. Hence diversified plants/lines can be expected in succeeding generations.
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