Neeraj Kumar*, Ram Avtar, Nisha Kumari, Rakesh Punia and Manjeet Singh
Department of Genetics and Plant Breeding, College of Agriculture, CCS Haryana Agricultural University, Hisar 125004 (Haryana), India
Email: neerajkummar8@gmail.com
Received-03.06.2022, Revised-14.06.2022, Accepted-24.06.2022
Abstract: Principal component and hierarchical cluster analyze were carried out with ten quantitative traits in 50 hybrids of Indian mustard [Brassica juncea (L.) Czern&Coss.]. Principal factor analysis identified three principal components which cumulatively explained about 63.7% variability. PC 1 explained the most variability, accounting for 30.6%, PC 2 for 12.7%, and PC 3 for 11.4% of the overall variation. PCA correlation circle revealed that main shoot length, number of siliqua on the main shoot, secondary branches per plant, primary branches per plant and seed yield per plant were positively correlated with each other. Hierarchical cluster analysis was performed to see the grouping pattern of parents of hybrids. Fifty hybrids were grouped into three clusters. Maximum of 27 hybrids were grouped in cluster II and showed characteristic of lesser main shoot length. Cluster 1st and 3rd had nine and 13 hybrids, respectively. Pedigree of hybrids showed that Cluster I and Cluster II comprised of majority of hybrids having female parents OA-RH 8812 and OA-RH 0749 while Cluster III comprised of OA-RH 0555 and OA-RH 30. Female parent, OA-RH 0630 was distributed among all clusters. Male parents were uniformly distributed among all clusters and no clear-cut pattern was found. Hence, in the future hybrid development programme we may use one female parent from each group in addition to the OA-RH 0630.
Keywords: Brassica juncea, Hybrid, Plant, Siliqua
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