This book discusses on heterosis of 48 genotypes produced from crossing of 24 elite maize inbred lines with two testers and four standard checks in line x tester mating method and the genotypes were evaluated in 6x9 alpha lattice design replicated twice. Nine potential hybrids with grain yield above 9505.9 kg/ha have been identified either for release as hybrids or for further use in maize breeding program.