| 论文题目: | Population genetics analyses of Hirsutella rhossiliensis, a dominant parasite of cyst nematode juveniles at a continental scale |
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| 作者: | Wang, Niuniu Zhang, Yongjie Jiang, Xianzhi Shu, Chi Hamid, M Imran Hussain, Muzammil Chen, Senyu Xu, Jianping Xiang,Meichun Liu, Xingzhong |
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| 刊物名称: | Appl Environ Microbiol |
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| 年份: | 2016 |
| 影响因子: | 4.303 |
| 论文下载: | http://aem.asm.org/content/early/2016/08/15/AEM.01708-16 |
| 摘要: | Hirsutella rhossiliensis is a parasite of juvenile nematodes, effective against a diversity of plant parasitic nematodes. Its global distribution on various nematode hosts and its genetic variation for several geographic regions has been reported, while the global population genetic structure and factors underlying patterns of genetic variation of H. rhossiliensis are unclear. In this study, 87 H. rhossiliensis strains from five nematode species (Globodera, Criconemella xenoplax, Rotylenchus robustus, Heterodera schachtii and Heterodera glycines) in Europe, America and China were investigated by multilocus sequence analyses. A total of 280 variable sites (frequency 0.6%) at eight loci and six clustering with high accordance with geographic populations or host nematode-associated populations were identified. Although H. rhossiliensis is currently recognized as an asexual fungus, recombination events were frequently detected. In addition, significant genetic isolation by geography and nematode hosts was revealed. Overall, our analyses showed that recombination, geographic isolation and nematode host adaptation have played significant roles in the evolutionary history of H. rhossiliensis IMPORTANCE: H. rhossiliensis has great potential for use as biocontrol agents to control nematodes in a sustainable manner as an endoparasitic fungus. Therefore, this study has important implications for use of H. rhossiliensis as a biocontrol agent and provides interesting insights into the biology of this species. |
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