Combining ability analysis was carried out involving 125 crosses for grain yield, its components and some of the quality characters in Line x Tester crosses. The magnitudes of specific combining ability (SCA) variances were higher than the general combining ability (GCA) variances for all the characters except productive tillers plant-1 which indicated preponderance of non-additive gene action in the inheritance of these traits. The SCA variances were significant for all the characters except days to 50 % flowering, head rice recovery, 1000-grain weight, kernel length, kernel L : B ratio, protein content (%) and amylose content (%). Among females, RTN- 3B and RTN-2B and among males IR-63879-195-195-2-2-3-2, NVSR-20, BL-184AR, GR-7 and IR-8866 were observed to be good general combiner for yield and most of the yield contributing characters. The cross combinations, RTN-3A X BL-184AR, RTN-13A X GR-7 and RTN-2A X NVSR-20 crosses exhibited positive significance SCA effects for grain yield plant-1 and some associated characters. Among these, RTN-3A X BL-184AR was found to be the best combination involving good x good general combiner parents and also exhibited significant highest SCA effects, significant heterobeltiosis and standard heterosis for grain yield plant^-1.