Abstract
In the present study, a set of 36 Indian mustard genotypes were evaluated in three replications for twelve agro-morphological traits. D2 analysis was done to study the diversity pattern which enabled the grouping of genotypes into 11 clusters. Cluster I was the largest (D2=7.53) comprising of 20 genotypes followed by cluster II (D2=7.20) of 7 genotypes, while other 9 clusters contained one genotype each. Estimates of average inter cluster distance revealed that clusters IX and XI were most divergent (D2=118.49) followed by clusters V and XI (D2=88.48). Hence, crossing between genotypes Pusa Agrani Rohini (cluster IX cluster XI); PM-28 Rohini (cluster V cluster XI) may yields a considerable amount of heterosis in F1 generation. Days to maturity (31.9 %) had the highest contribution, followed by seed yield per plant (25.4 %), days to 50% flowering (13.33 %), beak length (7.30 %) and 1000 seed weight (6.67 %) towards the observed genetic diversity. Selection for divergent parents based on concerned traits could enhance the development of transgressive segregants with increased vigor in Indian mustard. Keywords: Indian mustard, Genetic divergence, D2 analysis.
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