Divergence Analysis for Yield and Quality Traits in Some Indigenous Basmati Rice Genotypes [Oryza sativa L.].
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Date
2014-10
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Abstract
Genetic divergence was assessed among 23 genotypes of basmati rice representing different
regions of India on the basis of yield and quality characteristics utilizing Mahalanobis D2 analysis. Based on
the genetic distance (D2 values), the rice genotypes were grouped into six clusters. Of the six clusters formed
cluster VI consisted of maximum eight genotypes followed by cluster V accommodating six genotypes, cluster I
with four genotypes, cluster III and IV with three genotypes each and cluster II with one genotype. The results
indicated that there was some degree of similarity of genotypes clustered together on the basis of their origin.
However, the pattern of distribution of some genotypes from different eco-geographical regions was found
random, indicating that geographical diversity and genetic diversity were not related. The maximum intra
cluster distance was observed for the cluster III. The highest genetic divergence was observed between the
clusters IV and I exhibiting wide diversity. The genotypes representing cluster VI are more yielding combined
with excellent cooking quality. Among different traits, plant height, kernel length, elongation ratio and amylose
content had maximum contribution towards total divergence may be used as selection parameters in segregating
generations. Intelligent selection of genotypes from the clusters may be used as potential donors for future
hybridization programmes to develop varieties and hybrids of high yield without much compromise on quality.
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Keywords
Genetic divergence, Oryza sativa L., Cluster, Basmati rice, Amylose, Quality traits
Citation
Allam C R, Jaiswal H K, Qamar A. Divergence Analysis for Yield and Quality Traits in Some Indigenous Basmati Rice Genotypes [Oryza sativa L.]. International Journal of Applied Biology and Pharmaceutical Technology. 2014 Oct-Dec; 5(4): 257-263.