ORYZA- An International Journal on Rice
Year : 2009, Volume : 46, Issue : 3
First page : ( 193) Last page : ( 196)
Print ISSN : 0474-7615.

Combining ability analysis for hispa resistance in rice

Borah Jyoti Lekha, Sarma R. N.

Department of Plant Breeding and Genetics, Assam Agricultural University, Jorhat-785013, Assam, India

Abstract

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.

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Keywords

line x tester analysis, combining ability, GCA, SCA, rice hispa.

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