Abstract
Combining ability studies for grain yield and its components was studied using four male sterile lines and twelve testers at Sorghum Improvement Project, MPKV, Rahuri, Maharashtra. The mean squares due to lines, testers and lines x tester were highly significant indicating the presence of variability for most of the characters. Estimates of general combining ability (GCA) and specific combining ability (SCA) variances indicated the predominance of non-additive gene action for most of the characters. The line 104 A, RMS 2010-10A and testers RSR 986, RSR 1012, RSR 1019, RSR 1003 and RSR 955 were observed good general combiner for grain yield and yield contributing characters. The hybrid viz., 104A x RSR 1003, RMS 2010-10A x RSR 1013, RMS 2010-10A x RSR 955, 185A x RSR 1027, 185A x RSR 1020, RMS 2010-24A x RSR 1019, RMS 2010-24A x RSR 1012, 185A x RSR 986, RMS 2010-24A x RSR 1020 and RMS 2010-24A x RSR 986 etc. exhibited with highly significant and positive SCA effects for grain yield which could be exploited for development of hybrids.
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