Genetic divergence in t. aman rice

Abstract

Abstract : Genetic divergence analysis through principal component analysis (PCA), principal coordinate analysis (PCO), and canonical variate analysis (CVA) were done on 32 T. Aman rice genotypes. As per PCA, D2 and cluster analysis, the genotypes grouped into five different clusters. PCA showed 90.64% variation against first three eigen values. The highest number of genotypes was observed in cluster II. Cluster I and III each contained five genotypes while IV and V contained six and seven genotypes, respectively. Genotypes belonging to cluster I was far diverged from those of cluster II due to high inter-cluster distance. Plant height, days to flowering, days to maturity, tillers per hill, panicles per hill, primary branches per panicle, filled grain per plant and 1000-grain weight contributed maximum towards genetic divergence. Considering genetic diversity Doirgura, Hatisail, BRRI dhan38 and BRRI dhan34 might be selected as promising genotypes for future hybridization program.