Abstract:The inheritance and allelic relationship of genes for resistance to strains P1 and HB84-17 of Xanthomonas oryzae pv.oryzae in eight indica rice cultivars (Chuanzhi 4, Chuanzhi5, Sanhuangzhan 2, Erjiufeng, 83007, 929, 75-34, NT02) and one japonica rice cultivar Xianghu 25 were studied. Analyses of F1