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首页> 外文期刊>Zoologica Scripta: An International Journal of Evolutionary Zoology >Massive transoceanic gene flow in a freshwater turtle (Testudines: Geoemydidae: Mauremys rivulata)
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Massive transoceanic gene flow in a freshwater turtle (Testudines: Geoemydidae: Mauremys rivulata)

机译：淡水龟中大量的越洋基因流（Testudines：Geoemydidae：Mauremys rivulata）

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摘要

The freshwater turtle Mauremys rivulata ranges from the Adriatic coast of the Balkan Peninsula through the Aegean region and coastal western and southern Turkey southwards to Israel. In addition, it occurs on several Aegean islands, Crete and Cyprus. Previous investigations using mtDNA sequences found virtually no genetic differentiation across its distribution range, despite some major biogeographical barriers for terrestrial and freshwater biota. Thus, the absence of any phylogeographical differentiation would be unexpected. To re-examine genetic differentiation within M. rivulata, here we use a comprehensive rangewide sampling and information of 13 unlinked polymorphic microsatellite loci and compare these data against mtDNA variation. Our microsatellite analyses reveal a weak population structuring which conflicts, however, with most biogeographical barriers. We conclude that the genetic structure in the vast majority of the species' range has been shaped by massive transoceanic gene flow. This explanation is unlikely for the northernmost populations, which seem rather to be genetically impacted by intentionally released foreign turtles.
机译：淡水龟Mauremys rivulata的范围从巴尔干半岛的亚得里亚海海岸到爱琴海地区，从土耳其的西部和南部沿海向南延伸到以色列。此外，它还发生在几个爱琴海岛屿，克里特岛和塞浦路斯。先前使用mtDNA序列进行的调查发现，尽管陆地和淡水生物区系存在一些主要的生物地理障碍，但在其分布范围内几乎没有遗传分化。因此，没有任何谱系差异是无法预料的。为了重新检查小叶芒藻的遗传分化，在这里我们使用了范围广泛的全面采样和13个未连接多态性微卫星基因座的信息，并将这些数据与mtDNA变异进行了比较。我们的微卫星分析显示出较弱的种群结构，但是与大多数生物地理学障碍相冲突。我们得出的结论是，该物种绝大部分范围内的遗传结构都受到大规模跨洋基因流的影响。对于最北端的种群来说，这种解释是不太可能的，因为它们似乎受到故意释放的外来龟的基因影响。

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