Eighty seven single cross hybrids of maize were developed by crossing twenty nine new lines developed from the National Yellow Pool with three testers in a line x tester (l x t) method and evaluated for grain yield, starch, protein and oil content. Among parental lines (female) the inbred line; YP-15 was good general combiner for grain yield and starch content. While inbred lines YP-25 and YP - 16 were good general combiners for protein and oil content respectively. The hybrids such as ARBMH-09-29, ARBMH-09-27 for yield, ARBMH-09-27 for starch, three crosses viz., ARBMH-09-40, ARBMH-09-55 and ARBMH-09-14 for protein and two crosses viz., ARBMH-09-28, ARBMH-09-42 for oil content were the top crosses with high significant SCA effects. Heterosis studies indicated the expression of relative heterosis and heterobeltiosis in several crosses for most of the character in both desirable and undesirable direction. The cross combinations ARBMH-09-45, ARBMH-09-15 for grain yield and starch respectively, ARBMH-09-40 for protein and ARBMH-09-27 for oil content were the top crosses found to be promising as they had high standard heterosis.