Investigation was carried out in maize with 12 parents and 32 hybrids through Line x Tester analysis to
study the gene action. The analysis revealed the preponderance of non-additive gene action for seed yield and
its components. Among the parents studied the following parents viz., UMI 112, UMI 264, UMI 278, UMI
285 and Co 1 were good general combiners with higher mean values for seed yield and different yield components
viz., plant height, ear length, kernel rows and 100 grain weight. Among the 32 hybrids evaluated the hybrids
viz., UMI 264 x UMI 285, UMI 278 x UMI 285 and UMI 278 x CO 1, UMI 314 x UMI 285, UMI 328 x UMI
x UMI 61 and UMI 334 x UMI 325 were identified as good specific combiners for single plant yield. These
hybrids could be utilized in heterosis breeding to exploit hybrid vigour.