Combining ability analysis for hispa resistance in rice

Combining ability hispa resistance along with other yield attributing traits in rice was studied through Line x Tester analysis involving two lines and seven testers. The mean squares of combining ability for line x tester interaction were significant for all the characters. The Combining ability analysis revealed non-additive gene action for all the characters except for plant height. Among the lines IR-50, and among the testers AS-36 and Begonbisi were found to be the best general combiner. Two crosses viz; Mahsuri x Begonbisi and IR-50 x Govind showed desirable sca effects for grain yield and hispa resistance. Implications of these results were discussed for breeding high yielding varieties with hispa resistance.