中国主栽品种对7个白叶枯病菌菌株的抗性分析

Resistance of main rice cultivars in China to seven bacterial blight strains

用7个水稻白叶枯病菌菌株测试198份籼稻和123份粳稻主栽品种的抗性反应。结果表明,供试菌株中致病力最强的菌株为浙173,致病力最弱的菌株为JS49-6。321份试验材料中对7个菌株表现为全抗的籼稻品种有9份,粳稻品种16份;对7个菌株表现为全感的籼稻品种有6份,未有粳稻品种对7个菌株表现为全感病,这一结论表明粳稻品种对白叶枯病菌的抗性明显优于籼稻品种。且早、中、晚稻抗性水平分布趋势基本一致。

198 indica and 123 japonica main rice cultivars were tested for their resistance to seven bacterial blight （Xanthomonas oryzae pv. oryzae） strains in China. The results showed that among all seven bacterial strains, Zhe173 demonstrated the strongest pathogenicity while JS49 - 6 showed the weakest. Among the 321 tested rice cultivars, nine indica cultivars were resistant to all seven strains, while six indica cultivars were susceptible to those strains. Among all tested japonica cultivars, 16 of them were resistant to the seven strains, but none of them was susceptible to all the strains, indicating that the resistance of japonica cultivar was higher than that of indica. There was no difference among the resistance of early, medium and late sub-type rice.