Assessment of Genetic Diversity in Indian Mustard (Brassica juncea L. Czern & Coss) Genotypes Using D2 Analysis

A total 44 varied genotypes of Indian mustard were assessed for Genetic divergence during the 2021-22 Rabi season, using a randomized complete block design (RCBD) comprising 3 replications. Fourteen distinct characteristics, including days to 50% flowering, days of maturity, plant height, No. of primary and secondary branches/ plant, pod length, No. of pod on main shoot, length of main shoot, No. of seeds per pod, test weight, B.Y, H.I, oil content and grain yield were observed. D2 values employed to classify the genotypes into seven clusters, with largest cluster being cluster II, comprising 10 genotypes. Cluster III exhibited maximum intra-cluster distance, while most significant inter-cluster distance was observed between cluster II and IV. This suggested that genotypes in cluster II possess a broad range of genetic diversity. Notably, days to maturity played a crucial role in contributing to Genetic divergence among the traits studied.