Abstract： wild rice with high resistance to rice bacterial blight, by somatic cell hybridization to brought its high resistance into cultivated rice in a large grain incense. By QTL location, the high resistance of the hybrid offspring of the resistance loci in No. 1,3,5. in order to fine mapping of these resistance loci and cloning of resistance genes,was constructed by resistance disease and susceptible hybrids groups, these groups combined use of molecular markers linked to QTL for resistance loci contain a single chromosome segment penetration system of selection for the resistance locus QTL Fine Mapping and Cloning basis. The experiment is on chromosome 1 hybrid population's resistance gene screening. First by electrophoresis elimination of 500 individuals NO.3 and NO.5 Effects of resistance on chromosome so that it has a homozygous susceptible genes. Then on the NO.1's Resistance to research.
Key words: Rice; single chromosome segment; blight
