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2010•ORYZA- An International Journal on RiceRequires access

Genetic divergence studies in rice genotypes

Nibedita Mohanty, M. Reddi Sekhar, D. Mohan Reddy, P. Sudhakar

Open publisher page 7 citations

Abstract

Genetic divergence was assessed among 40 rice genotypes using Mahalanobis's D2 analysis. The 40 rice genotypes were grouped into five clusters. Cluster I was found to be the largest comprising of 25 genotypes followed by cluster III having 8 genotypes and cluster V included 5 genotypes. Cluster II and IV had single genotype each. The pattern of distribution of genotypes from different eco-geographical regions into various clusters was at random indicating that geographical diversity and genetic diversity were not related. The characters viz. leaf area at 90 DAS, Number of grains panicle−1 and days to 50% flowering contributed maximum towards genetic divergence among the genotypes.

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What this paper is about

Genetic divergence was assessed among 40 rice genotypes using Mahalanobis's D2 analysis. The 40 rice genotypes were grouped into five clusters. Cluster I was found to be the largest comprising of 25 genotypes followed by cluster III having 8 genotypes and cluster V included 5 genotypes. Cluster II and IV had single genotype each. The pattern of distribution of genotypes from different eco-geographical regions into various clusters was at random indicating that geographical diversity and genetic diversity were not related. The characters viz. leaf area at 90 DAS, Number of grains panicle−1 and days to 50% flowering contributed maximum towards genetic divergence among the genotypes.

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Available abstract

Genetic divergence was assessed among 40 rice genotypes using Mahalanobis's D2 analysis. The 40 rice genotypes were grouped into five clusters. Cluster I was found to be the largest comprising of 25 genotypes followed by cluster III having 8 genotypes and cluster V included 5 genotypes. Cluster II and IV had single genotype each. The pattern of distribution of genotypes from different eco-geographical regions into various clusters was at random indicating that geographical diversity and genetic diversity were not related. The characters viz. leaf area at 90 DAS, Number of grains panicle−1 and days to 50% flowering contributed maximum towards genetic divergence among the genotypes.

Key concepts: Genetic divergence, Genotype, Genetic diversity, Mahalanobis distance, Panicle, Biology, Divergence (linguistics), Cluster (spacecraft)

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