Genetic Diversity for Seed Yield and Component Traits in Indian Mustard [Brassica juncea (L.) Czern & Coss.] Chaurasia R. K.*, Bhajan Ram G. B. Pant University of Agriculture & Technology, Pantnagar, Uttarakhand *email: Chaurasiarameshkumar@gmail.com
Online published on 13 January, 2016. Abstract An experiment was conducted at the experimental farm at G.B. Pant University of Agriculture and Technology, Pantnagar in 2006. The broad objectives was to quantify genetic divergence for 13 quantitative characters including seed yield and oil content in Indian mustard (Brassica juncea L. Czern & Coss). The wide genetic variability was elucidated in the materials for all the 13 characters whereas genetic advance in per cent of mean was found to be high only for 1000-seed weight, number of secondary branches/plant, number of primary branches/plant, length of main raceme and siliquae on main raceme. The seed yield/plant had significant correlation in desirable direction with days to maturity, plant height, siliqua length and 1000-seed weight both at genotypic and phenotypic level. The divergence analysis grouped the 64 genotypes into 7 non-overlapping clusters. The maximum number of genotypes were grouped in Cluster-III (17) followed by Cluster-I (14), Cluster-II (13), Cluster-V (6), Clusters-VI and VII (5 in each), and Cluster-IV (4). No regular geographical demarcation was discernible from clustering pattern of the genotypes. Clusters pair III and IV followed by VII and VI was found to be most divergent. Days to flowering followed by days to maturity and plant height contributed maximum towards genetic diversity. Top Keywords Genetic diversity, heritability, genetic advance. Top |