Vol. 10, Issue 10 (2021)

Author(s):
J Buelah, V Ram Reddy, B Srinivas and N Balram

Abstract:
The aim of this study is to estimate the gene action, heritability and genetic advance in rice (Oryza sativa L.). The experiment was laid out in a randomized block design (RBD) with two replications at Regional Agricultural Research Station, Polasa, Jagtial, during kharif, 2019 cropping season. The results revealed that the days to 50% flowering, plant height, panicle length, number of grains per panicle, 1000-grain weight, grain yield per plant, spikelet fertility, milling percentage, head rice recovery and gelatinization temperature exhibited greater SCA variance than GCA variance which indicated the predominance of non-additive gene action whereas number of productive tillers per plant, hulling percentage, amylose content, gel consistency and alkali spreading value which indicated the predominance of additive gene action. GCA variance and SCA variance are equal for the characters kernel breadth, kernel length and L/B ratio. High heritability coupled with high genetic advance estimates were recorded for number of productive tillers per plant, number of grains per panicle, 1000-grain weight (g), grain yield per plant, head rice recovery, amylose content, gel consistency and alkali spreading value indicating the role of additive gene action and selection for these traits is reliable.