Vol. 12, Issue 5 (2023)

Author(s):
K Modunshim Maring, Madhubala and Patel PB

Abstract:
The experiment was carried out for studying the combining ability for yield and its components traits in rice. A set of 45 genotypes comprising of 32 hybrids and their 12 parents which represented 4 lines and 8 testers were planted in Randomized Block Design (RBD) with 3 replications during kharif – 2019-20 at Main Rice Research Centre, Navsari Agricultural University, Navsari. Among parents, the line, NVSR-453, and the testers, NVSR -409 and NAUR-1 were the good general combiners whereas the crosses, NVSR - 452 x NVSR - 486, NVSR - 453 x NVSR - 475 and GNR - 3 x Dandi were found to be good specific combiners for grain yield per plant and some of its component characters. The combining ability analysis also revealed that both additive and non-additive gene action were found controlling the expression of the traits under studied, however the magnitude of SCA variance was found to be higher than that of GCA variance for most of the characters, which indicated the predominance of non-additive gene action in the expression of most of the characters. None of the hybrids recorded significant sca effects for all the 13 characters studied.