Molecurar Breeding for Resistant Varieties Against Asian Rice Gall Midge in China

Asian rice gall midge (GM) is a major rice pest in South China. Breeding resistance varieties has been a viable and ecologically acceptable approach for managing the pest. This paper reports that the progress of

Asian rice gall midge （GM） is a major rice pest in South China. Breeding resistance varieties has been a viable and ecologically acceptable approach for managing the pest. This paper reports that the progress of breeding resistant varieties using the markers linked to Gin6 against GM fxom the year 1998 to 2006 in China. The DNA fingerprints of 4 biotypes of GM population fxom 7 locations were analyses by AFLP. Base on the fine mapping of resistance gene Gin6 against all 4 Chinese GM biotypes by RAPD and SSR methods respectively, the STS markers and SSR markers linked to gene Gin6 were used for breeding through MAS. Some new resistant garplasm with Gin6 gene were created. And six cultivars and six two-line or one line three-line hybrid rice against GM were bred and extended to the farmer. The technique system of MAS for resistant varieties against Asian rice gall midge was set up at Guangdong province of China.