用水稻白叶枯病菌的强毒力菌株,在不同籼、粳稻品种的不同生育期进行剪叶接菌,观察比较不同生育期与抗性变化的关系。结果表明,在测试的36个籼粳稻品种中,全生育期都表现感病的籼稻和粳稻各有5个品种;6个籼稻品种包括IR26,IR29,不同生育期都表现抗病,4个籼稻品种和16个粳稻品种表现成株期抗性,但抗性表达的方式因品种而异。 Using the virulent strain of Xanthomonas oryzae, the cuttings were inoculated at different growth stages of different indica and japonica cultivars. The relationship between different growth stages and resistance was observed. The results showed that there were 5 indica and japonica varieties in 36 indica and japonica varieties tested during the whole growth period, 6 indica cultivars including IR26 and IR29, resistant to disease at different growth stages, 4 indica rice Varieties and 16 japonica cultivars showed resistance at adult stage, but the way in which the resistance is expressed varies by breed.