Chief EditorArvind kumar
Print ISSN 0253-150X
Online ISSN 0976-0547
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Genetic Diversity Analysis for Bacterial Leaf Blight Disease Resistance in Rice (Oryza sativa L.)
First Online 28-02-2022|
Methods: The rice genotypes were screened using PDI for bacterial leaf blight (BLB) and subjected to D2 analysis for nine quantitative traits viz., plant height, number of productive tillers per plant, panicle length, days to fifty per cent flowering, number of grains per panicle, thousand grain weight, grain length, grain breadth and single plant yield.
Result: On the basis of Mahalanobis D2 statistics, the thirty five genotypes are grouped into VIII clusters. The highest intra cluster distance was recorded for cluster II (41.16) followed by cluster VI (37.73). Out of thirty five genotypes screened under field condition using percentage disease index (PDI), CR 1009 found to be resistant with the lowest PDI value of 9.67 per cent. The genotypes Karsamba, TPS 4 and Kaivara samba registered highest PDI value of 70.67, 67.22 and 66.67 respectively. The BLB resistance in genotype dependent and not cluster based. The resistant genotype CR 1009 under field screening was positioned in VI cluster. The cluster II had susceptible genotypes karsamba and kaivarasamba. Thus, the identified genotypes can be utilized in recombination breeding to provide BLB resistance segregants.
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