Genetic Analysis for Yield Components and Yield in Rice (Oryza sativa L.) Chaturvedi H. P.1,*, Talukdar P.2, Changkija Sapu1 1Department of Genetics and Plant Breeding, SASRD, Nagaland University, Nagaland (797 106), India 2Department of Plant Breeding and Genetics, Assam Agricultural University, Jorhat, Assam, India *Correspondence to E-mail: hpchaturvedi@yahoo.co.in
Online published on 31 March, 2014. Abstract Component analysis indicated importance of both additive and dominance gene action for the characters days to 50% flowering, 50% flowering to maturity, plant height, panicle length, grain filling percentage and length-breadth ratio, while only the dominance component was important for the characters like effective tillers per plant, panicle weight, grains panicle−1, 1000 grains weight and yield plant−1. Dominant genes were more frequent in the parents than the recessive genes for the characters days to 50% flowering, 50% flowering to maturity, plant height, panicle length and length-breadth ratio. Unequal gene frequencies for positive and negative alleles in the parents were observed for all the characters except grains panicle−1 for which equal gene frequencies were evident. The estimates of degree of dominance were more than unity for all the characters including yield plant−1, which indicated prevalence of over-dominance. Top Keywords Diallel, gene action, rice. Top |