测定了BG1 2 2 2、IRBB2 0 3、IRBB5、80 72 -2等品种对广东水稻白叶枯病强毒菌系Ⅴ型菌的抗性遗传。结果表明 ,BG1 2 2 2、IRBB5对Ⅴ型菌的抗性由 1对隐性基因支配 ,而 80 72 -2、IRBB2 0 3受 1对显性基因控制。抗性基因等位性测定显示 ,80 72 -2携带的抗性基因与IRBB7的Xa7基因等位 ,BG1 2 2 2携带的隐性基因与目前已知的抗Ⅴ型菌隐性基因xa5不等位 ,并独立遗传。 The resistance inheritance of Vibrio cholerae isolates, such as BG1 2 2 2, IRBB2 0 3, IRBB5,80 72 -2, was tested. The results showed that the resistance of BG1 2 2 2 and IRBB5 to V was dominated by 1 recessive gene, while 80 72 -2 and IRBB2 0 3 were controlled by 1 dominant gene. The allelic determination of the resistance genes showed that the alleles carried by 80 72 -2 were allelic to the Xa7 gene of IRBB7 and the recessive genes carried by BG1 2 2 2 were different from the recessive gene xa5 of the known anti-V type bacterium Bit, and independent genetic.