The present research was conducted to study the extent of heterosis for various economic traits in the single cross hybrids developed by line x tester design using twelve lines and six testers. The objective of this study to identify the best heterotic combinations for yield and yield related traits. Seventy two hybrids, parents along with three checks were evaluated in Randomized block design with two replications. Most of the hybrids exhibited heterosis for the yield and its component traits over mid parent, better parent and checks. With respect to cob weight BM60 x BM59,BM254 x BM258,BM254 x BM59 recorded highest heterosis. BM254 x BM258,BM254 x BM32 and BM259 x BM258 exhibited highest for ear length. For ear diameter BM254 x BM258,BM254 x BM59 and BM51 x BM59 showed highest heterotic performances. BM51 x BM258,BM254 x BM258, and BM127 x BM32 witnessed higher per se values with highest heterosis for number of rows per ear. With respect to 100 seed weight BM24 x BM59, BM254 x BM59, BM423 x BM59 recorded highest heterosis over mid parent, better parent and standard heterosis. With regard to shelling percentage, BM51 x BM258, BM254 x BM258 and BM24 x BM59 were found to be best combinations. Best combinations for grain yield per plant which exhibited heterosis were BM51 x BM258,BM24 x BM59,BM60 x BM59,BM254 x BM258 and BM254 x BM59. In this direction further multilocation trails for the above hybrids may be conducted and commercially exploited for yield per se.