Author(s):

S Vanisri, Priyanka B, Charles Wesly K, Sreedhar M, Ishwrya Laxmi V and Srikant Rahul

Abstract: Thirty eight cold tolerant rice genotypes were evaluated for genetic variability, correlation and path analysis for yield and yield attributing traits. Genetic analysis revealed high GCV and PCV for tillers per plant, panicle exertion and seed yield per plant. High heritability coupled with high genetic advance as per cent of the mean was observed for plant height, tillers per plant and seed yield per plant. Seed yield per plant having positive significant correlation with plant height, tillers per plant, panicle exertion, panicle length, spikelet fertility and filled grains per panicle at the phenotypic level. Path coefficient analysis determined plant height, panicle exertion, panicle length and filled grains per panicle exhibiting direct positive effect on yield, selection for these traits helps in improving seed yield. Principal component analysis (PCA) revealed five most informative principal components which together accounted 87.56% of the total variance. The traits panicle length, plant height, panicle exertion, seed yield, filled grains per panicle, days to 50% flowering and test weight were determined to be having highest contributions towards total divergence as per Principal component analysis and D2 analysis. Diversity analysis revealed that inter cluster distance was maximum between cluster III and V indicates that more diversity between the genotypes which provide ample opportunity to select donors to carry out hybridization programmes for the improvement of desirable traits in cold tolerant rice.

Pages: 1129-1137  |  839 Views  225 Downloads

Download (907KB)