Variability Studies for Yield, Yield Components and Quality Characters inM_4 Progenies of Rice (Oryza sativa)

摘要

Variability and heritability parameters were estimated for 18 yield components and quality parameters in 25 treatments of Akshaya mutant population in M4 generation. Four characters viz., number of fertile grains per panicle, grain yield per plant, ear bearing tillers per plant and water uptake manifested moderate to high estimates for PCV, GCV and genetic advance coupled with high heritability suggesting the role of additive gene effects in their inheritance. Except amylose content, all the remaining characters exhibited low to moderate GCV, PCV, genetic advance and moderate to high heritability indicating the preponderance of both additive and non additive gene action in their expression. All the genetic parameters studied recorded low estimates for amylose content indicating the predominance of non additive gene action. Hence, both additive and non additive genetic components could be exploited effectively by practicing reciprocal recurrent selection.