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Analysis of variance revealed highly significant differences among 27 genotypes for all the yield
components and most of the kernel quality traits except hulling percent, volume expansion ratio and
water uptake indicating that enough variability is present in the studied material. The magnitude of
difference between PCV and GCV was less for the traits indicating little influence of environment.
The higher estimates of PCV and GCV were observed for yield per plant (42.42;42.04) and filled
seeds per panicle (34.67;33.19) indicates possibility of genetic improvement through direct selection
for these traits, while hulling percent, milling percent, kernel elongation ratio, day to 50%
flowering, panicle length, kernel length and kernel width showed low PCV and GCV values
indicating the need for creation of variability by hybridization or mutation followed by selection.
High heritability in broad sense and high genetic advance as percent of mean exhibited by the traits,
effective tillers (88.8; 30.2), plant height (96.0; 35.3), flag leaf length (84.0 ; 32.8), filled seeds per
panicle (96.0;68.7) test weight ( 96.0; 39.1), yield per plant (98.0;68.7) ,head rice recovery (94.0;
27.7) and length/breadth ratio (93.0 ; 20.4) indicating preponderance of additive gene action, which
provide good scope for further improvement by selection.
Key words: Genetic Variability, Heritability, Grain Yield, Quality Traits, Rice