Abstract
Bacterial blight ( Xanthomonas oryzae ) is one of the most destructive pathogens to rice in south-west area of Japan and South East Asia. The rice cultivar "Nipponbare" shows the high field resistance against bacterial blight disease. We inoculated bacterial blight pathogens to "Nipponbare" mutants which were induced by the insertion of the endogenous retrotransposon Tos17 , and have screened 20 susceptible mutants among 3,000 mutant lines in two years. By genomic southern hybridization analysis and investigation of genetic segregation among progenies, two mutant lines were found to have tightly close relationship to the Tos17 insertion. We are analyzing the affected genes and the function of the genes to elucidate the mechanism of the field resistance against bacterial blight disease in rice.
