Study of Heritability, Genetic Advance and Variability for Yield Contributing Characters in Upland Rice Germplasm (Oryza sativa L.)

The present investigation is carried out to study the genetic parameters for yield and yield attributing characters in thirty six rice genotypes. Analysis of variance revealed significant differences for all the traits under study. The characters viz., grain yield per plant, harvest index and flag leaf length exhibited high Genotypic Coefficient of Variation (GCV) and Phenotypic Coefficient of Variation (PCV). Small differences between GCV and PCV were recorded for all the characters studied which indicated less influence of environment on these characters. The characters viz., number of spikelets per panicle and plant height exhibited high heritability coupled with high genetic advance indicating that simple selection could be effective for improving these characters.