中国水稻科学

• 研究简报 • 上一篇    下一篇

水稻白叶枯病菌小种分化的监测

许志刚1; 孙启明1; 刘凤权1; 陈志谊2; 胡白石1; 郭亚辉1; 刘永峰2; 刘红霞1   

  1. 1南京农业大学 植物病理系, 江苏 南京 210095
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-09-10 发布日期:2004-09-10

Race Monitoring of Rice Bacterial Blight (Xanthomonas oryzae pv. oryzae) in China

XU Zhi-gang 1; SUN Qi-ming 1; LIU Feng-quan 1; CHEN Zhi-yi 2; HU Bai-shi 1; GUO Ya-hui 1; LIU Yong-feng 2; LIU Hong-xia1   

  1. 1Department of Phytopathology; Nanjing Agricultural University; Nanjing 210095; China; 2Plant Protection Research Institute; Jiangsu Academy of Agricultural Sciences; Nanjing 210014; China
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-09-10 Published:2004-09-10

摘要: 通过每10年1次对病原菌致病力分化的监测发现,国内稻区病菌小种的组成基本稳定,仅个别小种有所变化。目前流行的优势小种仍为C1和C2群,即携带有[i]Xa3[/i]抗性基因的品种仍可广泛种植;但能够侵染[i]Xa4[/i]抗性基因的C4、C5群小种的数量有所增加,即将达到流行的阈值。为便于与国内外小种鉴别的结果相比较,选用IRRI推出的几个近等基因系材料作为鉴别品种,将中国的白叶枯病菌区分为8个小种(C1~C8)

关键词: 水稻, 白叶枯病, 生理小种

Abstract: Based on inoculation test, six varieties (Jingang 30, IRBB3, IRBB4, IRBB5, IRBB14 and Java14) were selected as differential varieties for monitoring races of Xanthomonas oryzae pv. oryzae(Xoo) in China. Xoo population in China could be divided into eight races, named as C1 to C8, respectively. The races C1 and C2 were stable and predominant. Therefore, cultivars carrying resistant gene Xa3 could still be planted widely. The number of races C4 and C5 increased during the last 10 years. The resistance gene Xa4 will be arrested by the races C4 and C5. The genes xa5 and Xa7 showed qualitative resistance to all the races in China, and it is very important and valuable to introduce those genes for further breeding programe in China.

Key words: rice, bacterial blight, race, monitoring