我国水稻微核心种质资源对白叶枯病抗性的鉴定和评价

Evaluation of Bacterial Blight Resistance of Chinese Micro Core Rice Germplasm

由Xanthomonas oryzae pv.oryzae(Xoo)引起的白叶枯病是水稻生产中普遍发生、危害严重的一种细菌病害。本研究采用我国和菲律宾的6个Xoo代表菌株,人工接种评价了来源于我国26个省份的174份水稻微核心种质资源对白叶枯病的抗性。结果表明,来源于不同稻作区的种质资源以及籼粳亚种对白叶枯病的抗性存在明显分化,6个粳稻品种和7个籼稻品种对2个或2个以上的菌株具有抗性,其中7-304、山酒谷、麻谷子、包二幅以及古154抗谱较广。本文的研究结果将为水稻抗白叶枯病育种提供有用的信息。

Bacterial blight disease of rice,caused by Xanthomonas oryzae pv. oryzae（ Xoo）,is one of the most devastating rice diseases worldwide. In this study,total 174 of rice core germplasm materials from 26 provinces of China were evaluated resistance to BB by inoculation with six representative Xoo strains of China and the Philippines. The results showed there was distinct difference of bacterial blight resistance among cultivars from rice different cultivation regions,and subgroup specificity between indica and japonica rice. Six japonica cultivars and seven indica cultivars were resistant to two or more than two Xoo strains,among them,Shangujiu,Maguzi,Baoerfu and Gu154 exhibited broader resistance spectrums. These results will provide useful information for improvement bacterial blight resistance in rice breeding program.