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 mutants which lacked the field resistance. One of the mutants, XC20, had tightly related to a Tos17 insertion in the ninth chromosome. A translational region of about 430 bp were found near the Tos17 insertion. This XC20 protein had a sequence similarity to calmodulin binding protein ZmSAUR2 of maize and pathogenesis induced protein upa5 of pepper. We are analyzing by the complementary investigation with the XC20 gene in the XC20 mutant for the recovery of the field resistance against the disease.
