Mechanisms of invasive population establishment and spread of pinewood nematodes in China
Mechanisms of invasive population establishment and spread of pinewood nematodes in China
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中国松材线虫入侵种群建立及传播机制
DOI：
10.1007/s11427-009-0071-y
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发表时间：
2009-06
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影响因子：
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本文总结了我们对松材线虫的研究结果。通过群体遗传学分析，确定中国入侵种群中不存在奠基者效应和遗传漂变引起的遗传瓶颈。不同来源线虫的多次入侵导致入侵种群具有丰富的遗传多样性。在入侵过程中保持较高的遗传多样性可能是其成功入侵的遗传机制之一。通过种间竞争试验表明，B繁殖力高，竞争力强。木生植物在竞争中超过了本地种B. mucronatus在自然生态系统中的入侵过程。竞争置换可能是B.木虱的入侵此外，种间不平等杂交和渐渗有利于入侵种的产生，也加速了B.短角藻木生植物为探讨松材线虫生态适应的分子机制，对与松材线虫生态适应密切相关的几个重要基因的结构、功能和进化进行了研究。并进一步探讨了松树生态系统对松材线虫入侵的抵抗和恢复机制。这些研究结果揭示了PWN成功入侵的部分遗传和生态学机制，为进一步研究PWN入侵机制奠定了基础。研究结果为有效控制松材线虫病的发生和蔓延提供了科学依据。需要进一步调查的各个方面进行了审议。
This paper summarizes the results of our study of the pinewood nematode (Bursaphelenchus xylophilus). By population genetic analysis, it was determined that there was no genetic bottle caused by the founder effect and genetic drift in the Chinese invasive population. Multiple invasions with large amounts of nematodes from different sources led to rich genetic diversity in the invasive population. Keeping high genetic diversity in the invasive process may be one of the genetic mechanisms in its successful invasion. By testing interspecies competition, it was shown that, with high fecundity and a strong competitive ability,B. xylophilusoutcompeted the native speciesB. mucronatusin the natural ecosystem during the invasion process. Competitive displacement may be one of the ecological mechanisms ofB. xylophilus’s invasion. In addition, an unequal interspecific hybridization with introgress was in favor of the invasive species which also accelerated the replacement ofB. mucronatusbyB. xylophilus. The structures, functions and evolutions of a few important genes that are closely related to the ecological adaptation of pinewood nematodes were studied to explore the molecular mechanism of its ecological adaptations. Further, the resistance and resilience mechanism of the pine ecosystem invaded by pinewood nematodes was also investigated. The results of these studies uncovered a portion of the genetic and ecological mechanisms of PWN’s successful invasion and laid a foundation for further study to obtain a comprehensive interpretation of the mechanisms of the nematode invasion. The results also provided a scientific basis for effectively controlling the occurrence and spread of pine wilt disease which is caused by nematodes. Various aspects requiring further investigation are considered.
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DOI：
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发表时间：
2005
期刊：
Journal of Beijing Forestry University
影响因子：
--
作者：
Song Jiying;Luo Youqing;Shi Juan;Yan XiaoSu;C. Weiping;J. Ping
通讯作者：
Song Jiying;Luo Youqing;Shi Juan;Yan XiaoSu;C. Weiping;J. Ping
影响因子：
1.2
作者：
S. Jikumaru;K. Togashi
通讯作者：
S. Jikumaru;K. Togashi
DOI：
--
发表时间：
1994
期刊：
ROREST RESEARCH
影响因子：
--
作者：
C. Beijing
通讯作者：
C. Beijing
影响因子：
1.3
作者：
S. Takemoto;K. Futai
通讯作者：
S. Takemoto;K. Futai
DOI：
10.1007/s11461-009-0020-8
发表时间：
2009-01
期刊：
Frontiers of Forestry in China
影响因子：
--
作者：
Juan Shi;Youqing Luo;Xiao-su Yan;Wei-ping Chen;P. Jiang
通讯作者：
Juan Shi;Youqing Luo;Xiao-su Yan;Wei-ping Chen;P. Jiang