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Exploring the genetic diversity for yield and quality traits in indigenous landraces of rice (Oryza sativa L.)

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An investigation on 41 genotypes of rice revealed that estimates of variability, heritability and genetic advance was high for grain yield plant-1, gel consistency, number of filled grain panicle-1,number of total grain panicle-1, alkali spreading value, number of chaffy grain panicle-1, grain size and test weight indicating the predominance of additive gene action for these traits. Mahalanobis D2 analysis grouped 41 genotypes into 8 different clusters and grain breadth contributed maximum towards divergence. Maximum inter-cluster distance was observed between cluster III and VII followed by cluster II and III indicating, maximum genetic diversity between these clusters. Character association and path-analysis revealed that,  among yield attributing characters, number of filled grains panicle-1, number of total grain panicle-1, harvest index, test weight, number of chaffy grains panicle-1,number of panicles plant-¹ and grain length had significant positive  association with grain yield plant-1 and among grain quality traits, kernel length and kernel length after cooking exhibited significant association with  amylose content.
Title: Exploring the genetic diversity for yield and quality traits in indigenous landraces of rice (Oryza sativa L.)
Description:
An investigation on 41 genotypes of rice revealed that estimates of variability, heritability and genetic advance was high for grain yield plant-1, gel consistency, number of filled grain panicle-1,number of total grain panicle-1, alkali spreading value, number of chaffy grain panicle-1, grain size and test weight indicating the predominance of additive gene action for these traits.
Mahalanobis D2 analysis grouped 41 genotypes into 8 different clusters and grain breadth contributed maximum towards divergence.
Maximum inter-cluster distance was observed between cluster III and VII followed by cluster II and III indicating, maximum genetic diversity between these clusters.
Character association and path-analysis revealed that,  among yield attributing characters, number of filled grains panicle-1, number of total grain panicle-1, harvest index, test weight, number of chaffy grains panicle-1,number of panicles plant-¹ and grain length had significant positive  association with grain yield plant-1 and among grain quality traits, kernel length and kernel length after cooking exhibited significant association with  amylose content.

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