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Abstract
Genetic variability variationBrassica juncea.Lwas studied during 2017-2018. Analysis of data showed existence of significant difference among the cultivars for seed and agronomic traits. The coefficient of variation (genotypic/phenotypic) wasrelatively higher for number of branches (secondary),siliquae length, Harvest index and seed yield per plant. Whereas moderate variation was observed for main shoot length followed by 1k seed weight, no. of primary branches and siliquae on main shoot. Significant heritability (bs) was observed for seed and agronomic traits namely HI, secondary branches,Days to 50% and 100% flowering,siliquae length and number on main shoot. Highest GA was recorded for seed per siliquae, secondary branches, yield/plant and siliquae length. The maximum intra-cluster distance was recorded within cluster II followed by I, IV and III clusters. Maximum inter-cluster distance is observed between II &IV. These results suggest maximum divergence between cluster II, IV and III, IV and maximum divergence observed among cluster II and IV.