Virulence of Part Populations of Aphelenchoides besseyi on Rice in China

PEI Yanyan1,2,#, CHENG Xi1,#, XU Chunling1, YANG Zaifu3,  XIE Hui1,*

doi:10.3969/j.issn.10017216.2012.02.012

Chinese Journal OF Rice Science >

2012 , Vol. 26 >Issue 2: 218 - 226

DOI: https://doi.org/10.3969/j.issn.10017216.2012.02.012

Research Papers

Virulence of Part Populations of Aphelenchoides besseyi on Rice in China

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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; ³College of Agronomy， Guizhou University， Guiyang 550025, China;

Received date: 2011-08-08

Revised date: 2011-12-12

Online published: 2012-03-10

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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

Cite this article

PEI Yanyan1,2,#, CHENG Xi1,#, XU Chunling1, YANG Zaifu3, XIE Hui1,* . Virulence of Part Populations of Aphelenchoides besseyi on Rice in China[J]. Chinese Journal OF Rice Science, 2012 , 26(2) : 218 -226 . DOI: 10.3969/j.issn.10017216.2012.02.012

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