Molecular genetic structure and evolution in native and colonized populations of the Chinese mitten crab, Eriocheir sinensis
Molecular genetic structure and evolution in native and colonized populations of the Chinese mitten crab, Eriocheir sinensis
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DOI：
10.1007/s10530-008-9256-8
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发表时间：
2009-02
影响因子：
2.9
通讯作者：
Chenghui Wang;Si-fa Li;Cuizhang Fu;Xiaoling Gong;Len Huang;Xiaozhe Song;Yan Zhao
中科院分区：
文献类型：
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作者：
Chenghui Wang;Si-fa Li;Cuizhang Fu;Xiaoling Gong;Len Huang;Xiaozhe Song;Yan Zhao
中华绒螯蟹（Eriocheir sinensis）是中国的本土物种，自1912年以来就在欧洲大陆和北美生活。本文分析了中华绒螯蟹原生种群（中国长江、黄河和辽河）和外来种群（欧洲易北河、莱茵河和泰晤士河以及北美旧金山湾）线粒体COII片段（693 bp）、Cytb片段（766 bp）和ITS片段（706 bp）的核苷酸变异。主要研究结果如下：首先，本地种群的遗传变异性高于欧洲和北美殖民地种群，但易北河种群除外，易北河种群与本地种群具有相似的变异水平。其次，单子代的显著减少与中华绒螯蟹的殖民化有关。第三，AMOVA和fst结果表明，三大洲种群间不存在显著的遗传分化，但大陆内和大陆间成对种群间存在显著的遗传分化。第四，发现欧洲种群中存在扩展漂变和基因流动模式。中立性检验和r2统计表明，在殖民地种群中存在适度的创始种群，只有长江种群经历了近期的种群扩张。最后，研究结果表明，欧洲种群在多个时期起源于中国的多条河流。旧金山的人口既来自当地的中国人口，也来自被殖民的欧洲人口，最有可能是泰晤士河地区的人口。
Chinese mitten crab (Eriocheir sinensis), a native species in China, has populated Continental Europe and North America since 1912. In this paper, the nucleotide variation in the fragments of mitochondrial COII (693 bp), Cytb (766 bp), and nucleotide ITS (706 bp) was analyzed in native (Yantgze, Yellow, and Liaohe Rivers in China) and colonized (Elbe, Rhine, and Thames Rivers in Europe, and San Francisco Bay in North America) populations of the Chinese mitten crab. The major findings are as follows. First, the genetic variability in the native populations is higher than that in the colonized European and North American populations, with the exception of the Elbe River population, which possesses a similar level of variability with the native populations. Second, a remarkable loss of singletons has been associated with the colonization of Chinese mitten crabs. Third, the AMOVA andFSTresults demonstrate that there are no significant genetic differentiations among the populations from the three continents, but there is a significant differentiation between pairwise populations within and among continents. Fourth, it is found that expansion-drift and gene flow pattern are involved in the European populations. The neutrality test andR2statistics suggest that a moderate founder population exists in the colonized populations, and only the Yangtze River population has undergone a recent population expansion. Finally, the results demonstrate that the European populations originate from multiple rivers in China on multiple occasions. The San Francisco population originates from both the native Chinese populations and the colonized European populations, most likely the Thames population.