1Division of Plant Breeding and Genetics, SKUAST-Kashmir, Shalimar, Srinagar, 190025, India
2MRCFC, Khudwani, SKUAST-Kashmir, Shalimar, Srinagar, 190025, India
*Corresponding author: dar.sajad@rediffmail.com
Online published on 13 May, 2016.
Rice is one of the crucial staple food crops and holds two third of world population. In order improve its production and productivity a diallel study was carried out over two diverse environments in 2012 by generating 36 F1hybrids using 9 parents. Analysis of variance revealed significant differences among the genotypes together with significant G x E interaction for most of the characters studied. Estimates of g and s revealed that, the latter component of variance wasgreater in maginitude for most of the traits for pooled data obver environments. The maginitude of D was higher than corresponding, A indicating non-additive gene action was of greater importance. Significant and positive estimates of GCA over pooled data for grain yield/plant identified the parents, SKAU-389, Jhelum, SKAU-382, and SR-1as promising. Likewise 15 potential hybrid combinations for grain yield/plant were observed on the basis of high and significant SCA effects. The hybrids, Jhelum x K-08-60, SKAU-389 x K-08-60, SR-1 x K-08-60, K-08-59 x PS-5 and China-988 x SR-1 were prospective combinations for grain yield/plant and other desirable characters. Results would indicate that the parental lines are genetically diverse and could contribute to the improvement of hybrid rice productivity.
Highlights
• 36 hybrid and 9 parents were analysed for their general and specific combining abilities over environments.
• Significant differences among the genotypes together with significant G x E interaction.
• Non-additive gene action was found of greater magnitude.
combining ability, diallel, gene action, G x E interaction, GCA, SCA, temperate ecology
