Assessment of genetic divergence through multivariate analysis in chilli (Capsicum annuum L.)
An experiment was conducted to analyze the genetic diversity among 63 genotypes for ten quantitative and six qualitative characters in chilli at Horticultural Research Station, Lam, Guntur, Andhra Pradesh. The analysis of variance revealed significant differences among the genotypes for all the characters studied. Based on hierarchial cluster analysis, the 63 genotypes were grouped into 8 clusters. Among the clusters, cluster II was the largest, containing 18 genotypes followed by cluster III with 15 genotypes and cluster VIII had the minimum number (1) of genotypes. The highest inter cluster distance was observed between cluster IV and VIII (7941.635) whereas the lowest was observed between cluster VI and VIII (2836.497). Cluster VII (614.548) has exhibited highest intra cluster distance and the lowest was observed in cluster VIII (0.00). The maximum contribution towards genetic divergence was by fruit diameter (44.14%) followed by yellow carotenoids (16.90%), red carotenoids (10.45%), ascorbic acid (10.19%) and capsaicin (9.17%). From the principal component analysis, first six principal components with eigen value more than one were observed to contribute 76.83 per cent towards the total variability. Among the six principal components, PC1 contributed maximum towards variability (25.06%). Considering diversity pattern and horticultural performance, the genotypes Warangal chapatta, LCA-702, LCA-724, LCA-756, LCA-353 and LCA-716 have been identified as better parents and were suggested for an efficient hybridization programme of chilli.
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