中国水稻科学

中国水稻科学 ›› 2012, Vol. 26 ›› Issue (2): 218-226.DOI: 10.3969/j.issn.10017216.2012.02.012

• 研究报告 • 上一篇    下一篇

中国水稻干尖线虫部分群体对水稻的致病力测定

裴艳艳1,2,# ,程曦1,# ,徐春玲1,杨再福3,谢辉1,*   

  1. 1华南农业大学 资源环境学院 植物线虫研究室/ 植物检疫线虫检测与防疫研究中心,  广东 广州510642; 2上海市崇明县蔬菜科学技术推广站 植物保护科， 上海 202150; 3贵州大学 农学院, 贵州 贵阳 550025；
  • 收稿日期:2011-08-08 修回日期:2011-12-12 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 谢辉1,*
  • 基金资助:

    国家自然科学基金资助项目(30871629)。

Virulence of Part Populations of Aphelenchoides besseyi on Rice in China

PEI Yanyan 1,2,# , CHENG Xi 1,# , XU Chunling 1, YANG Zaifu 3 ,  XIE Hui 1,*   

  1. 1 Laboratory of Plant Nematology/Research Center of Nematodes of Plant Quarantine, College of Natural Resources and  Environment， South China Agricultural University, Guangzhou  510642, China; 2 Section Office of Plant Protection, Vegetable Science and Technology Extension Station, Shanghai 202150, China; 3 College of Agronomy，  Guizhou University， Guiyang 550025,  China;
  • Received:2011-08-08 Revised:2011-12-12 Online:2012-03-10 Published:2012-03-10
  • Contact: XIE Hui1,*

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摘要： 为了解不同地理群体和寄主群体的中国水稻干尖线虫对水稻的致病力差异，通过室内水稻盆栽接种试验，对来自中国6个省、2种不同寄主植物上的水稻干尖线虫8个群体的致病力进行了测定和分析。结果表明，供试的8个水稻干尖线虫群体均能侵染供试的3个水稻品种，但不同群体对水稻同一品种的致病力，以及同一群体对不同水稻品种的致病力均存在差异；不同水稻品种被侵染后的症状也存在差异，仅有辽盐16被所有群体侵染后均表现“干尖”症状，武育粳3号和博优998没有明显“干尖”症状。供试的3个水稻品种接种水稻干尖线虫后均能抽穗，但是株高、穗长、单株穗数和千粒重受到不同程度的影响。此外，水稻干尖线虫对水稻的致病力与群体寄主相关，来自草莓的水稻干尖线虫群体对水稻的致病力明显弱于来自水稻上的群体；在供试的水稻干尖线虫群体中，HN2群体对水稻品种辽盐16的生长影响最大，但在稻株上的虫量最少，显示该群体繁殖数量不大，但具有较强的致病力。这说明水稻干尖线虫在水稻上的繁殖数与致病力之间并不一定呈正相关。这些结果表明中国的水稻干尖线虫可能存在不同的生理小种或致病型。

关键词: 水稻干尖线虫, 水稻, 致病力

Abstract: In order to reveal  the pathogenic difference of Aphelenchoides besseyi populations from different geographic regions and  hosts in China, a virulence   investigation  of eight  populations of A. besseyi from six provinces on rice  were carried out on potted rice in greenhouse. Among the eight  populations of A.besseyi, one were extracted from the strawberry (Fragaria ananasa) and seven  from rice. The results showed that all the eight  populations of A. besseyi infected 3 varieties of rice (Liaoyan 16, Wuyujing 3 and Boyou 998), but their virulence varied with rice variety and nematode population. infection with nematodes  caused various symptoms on different rice varieties with typical symptom of “white tip” on Liaoyan 16,  but  without obvious symptoms on the other two. All the varieties   inoculated with nematodes could tassel, but their  plant height, panicle number  per plant,  panicle length and 1000grain weight were affected to various degree. The results also showed that the virulence of A. besseyi  was related to the origin of host. The population of A. besseyi from the  strawberry had weaker virulence than those from rice. In addition, among all the eight  nematode populations,  infection by HN2  greatly inhibited the growth of   Liaoyan 16   with least  nematode.  It indicated that  this population had stronger virulence than the others.  It also showed that there was no positive correlation between the propagation number and virulence of A. besseyi. All the results indicated that there may be different physiological races or pathotypes of A.besseyi in China.

Key words: Aphelenchoides besseyi, Oryza sativa, virulence

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