Reconciling the biogeography of an invader through recent and historic genetic patterns: the case of topmouth gudgeon Pseudorasbora parva
Reconciling the biogeography of an invader through recent and historic genetic patterns: the case of topmouth gudgeon Pseudorasbora parva
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DOI：
10.1007/s10530-018-1693-4
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发表时间：
2018-08-01
影响因子：
2.9
通讯作者：
Gozlan, Rodolphe E.
中科院分区：
文献类型：
--
作者：
Hardouin, Emilie A.;Andreou, Demetra;Gozlan, Rodolphe E.
引进物种在其原生范围内的遗传变异性和种群结构可能是它们入侵成功的重要决定因素，但有关本地种群的数据在相关研究中往往缺乏代表性。因此，为了确定尖嘴鱼原生范围内的遗传结构对它们在欧洲的高入侵成功的贡献，我们使用了一个包含19个原生种群和11个非原生种群的数据集。在9个微卫星座位上对666个样本进行了分析，并对其线粒体DNA进行了597bp的测序。分析表明，在该地区有三个不同的谱系，其中两个单倍群在中国(100%)中流行，一般围绕秦岭分裂。这两个单倍群的测年结果与过去的地质事件非常吻合。最近，它的分布受到水产养殖中鱼类运动的影响，导致了以前在中国北部和南部分离的种群之间的基因流动。它们在欧洲的系统地理表明，它们只有两次引入事件和两条扩散路线。微卫星数据显示，本地种群比入侵范围内的种群具有更高的遗传多样性，这与之前对P.parva的研究形成了鲜明对比。这项研究证实了在评估遗传变异性对入侵成功的影响时，在原生和非原生入侵物种范围内进行广泛抽样的重要性。
The genetic variability and population structure of introduced species in their native range are potentially important determinants of their invasion success, yet data on native populations are often poorly represented in relevant studies. Consequently, to determine the contribution of genetic structuring in the native range of topmouth gudgeon Pseudorasbora parva to their high invasion success in Europe, we used a dataset comprising of 19 native and 11 nonnative populations. A total of 666 samples were analysed at 9 polymorphic microsatellite loci and sequenced for 597 bp of mitochondrial DNA. The analysis revealed three distinct lineages in the native range, of which two haplogroups were prevalent in China (100%), with a general split around the Qinling Mountains. Dating of both haplogroups closely matched past geological events. More recently, its distribution has been influenced by fish movements in aquaculture, resulting in gene flow between previously separated populations in Northern and Southern China. Their phylogeography in Europe indicate as few as two introductions events and two dispersal routes. Microsatellite data revealed native populations had higher genetic diversity than those in the invasive range, a contrast to previous studies on P. parva. This study confirms the importance of extensive sampling in both the native and non-native range of invasive species in evaluating the influence of genetic variability on invasion success.