The study envisaged assessing the general combining ability of the parents and specific combining ability of the hybrids, using line x tester mating design. Thirty six hybrids derived from mating six testers with six lines in L x T design along with their parents and checks were evaluated. The studies on combining ability indicated the predominance of dominance variance than additive variance for the characters plant height, leaf length, stem girth, green fodder yield, dry matter yield and hydrocyanic acid. This suggests the usefulness of heterosis breeding or any breeding plan which makes use of specific combining ability effects for improvement in these traits.