云南稻种对白叶枯病菌系抗性分析

Analysis on Resistance of Yunnan Rice to Bacterial Strains of Xanth-omonas Campestris pv. Oryzae

从1983～1990年,用云南主要的4个菌系群菌株,测定了28个单位的940份地方水稻品种抗性,结果表明抗1群菌的材料占30.0％,抗Ⅱ群菌占29.3％,抗Ⅲ群菌占30.3％,抗Ⅳ群菌占28.2％。通过比较分析,筛选了部分品种供生产和推广使用,研究证明菌系与品种有特异性交又互作关系。

During 1983 to 1990, 940 local rice varieties from 28 units have been tested for their resistance to 4 main bacterial blight (Xanth-omonas Campestris pv. Oryzae) strains in Yunnan Province. As a res-ult it has been proved that the rice materials resistant to Strain Ⅰ make 30% of the total, the rice materials resistant to Strain Ⅱ make 29.3%, those resistant to Strain Ⅲ make 30.2%, and those to Strain Ⅳ make 28.2%. With our comparative analysis, some of the varieties, such as Hao Shuang 7, Hao Shuang 8, Yunnan Xiang Nuo 1 and the like have been selected for production and expansion. Our studies show that the interaction between the strains and the rice varieties is specific.