Combining ability analysis for yield and its components in hybrid rice

摘要

Sixteen fertility restorers were selected after screening 60 improved germplasm collections with 3 cytosterile lines. The restorers and their hybrids were evaluatedfor grain yield and its component traits. The Restorer BPT 5204, Taraori Basmati, Sarju-52, Type-3, and HUBR2-I were found to be good general combiners for grain yield and other traits. Among CMS lines, IR68897A was found to be good general combinerfor days to 50% flowering, days to maturity and number of spikelet panicle~(-1). Pusa Sugandha-3 and Pusa Sugandha-4 both exhibited better gca for majority of the quality traits. The specific cross combinations characterized with high significant sea effects were Pusa6A Krishna Hansa, Pusa6A Type-3 and 1R68897A Type-3 for grain yield plant~(-1), number of grains panicle and number of effective tillers plant. BPT 5204 was found to be the best on the basis of per se performance and gca effects for grain yield plant~(-1), number of spikelets panicle and number of grains panicle~(-1); Narendra-359and Krishna Hansa for days to 50% flowering, panicle length. Pusa6A Krishna Hansa was found to be the best on the basis of per se performance and sea effects for number of effective tillers plant panicle length and grain yield plant. The gca effects ofthe parents were not reflected in the sea effects of the crosses in all traits studied.