Genetic diversity for yield and its component traits in chickpea (Cicer arietinum L.)
Abstract
An investigation was carried out among the 169 germplasm, including indigenous and exotic collections, of chickpea to study the nature and magnitude of genetic divergence using Mahalanobis’s D2 Statistics. The experiment was carried out during rabi season of 2015 at RARS, Vijayapura. Based on D² analysis, the 169 germplasm lines were grouped into eight different clusters indicating diverse nature of material studied. Cluster I was the largest with 53 genotypes followed by cluster III (44 genotypes) and cluster II (34 genotypes), while clusters VI, VII and VIII were solitary indicating the grouping of exotic collections in definite groups. Among the seed yield components, seed yield followed by number of days to maturity and days to 50% flowering contributed maximum towards the divergence. Cluster V showed the maximum mean value for seed yield. The intra and inter cluster divergence among the genotypes was varying in magnitude. The intra-cluster distance was maximum in cluster IV followed by clusters III and V. The widest inter cluster distance was noted between cluster IV and V followed by V and VIII, II and IV. Cluster VI, VII and VIII were solitary giving scope for hybridization programme for improvement of chickpea genotypes. The grouping of genotypes was irrespective of desi or kabuli types used in the study.
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