Microsatellite variation and population structure of the moor frog (Rana arvalis) in Scandinavia
Microsatellite variation and population structure of the moor frog (Rana arvalis) in Scandinavia
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DOI：
10.1111/j.1365-294x.2009.04252.x
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发表时间：
2009-07
影响因子：
4.9
通讯作者：
T. Knopp;J. Merilä
中科院分区：
文献类型：
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作者：
T. Knopp;J. Merilä
最近的几项研究发现，两栖动物种群在相当短的地理距离内具有高度的遗传结构，并且遗传有效扩散的速度可能因性别而异。然而，除了常见的青蛙（Rana temporaria）之外，人们对北方欧洲两栖动物的遗传结构和性别偏见的传播知之甚少。利用微卫星标记研究了斯堪的纳维亚摩尔蛙（Rana arvalis）种群内和种群间的遗传多样性和分化模式。本地红毛菊的遗传多样性较低。arvalis种群不是纬度的简单线性负函数，而是一个凸函数：遗传多样性在中纬度种群达到峰值，此后向北急剧下降。种群间遗传分化的平均程度（FST = 0.14）低于观察到的普通青蛙（FST = 0.21），虽然隔离的距离模式是相似的两个物种。与普通青蛙相反，没有发现雌性偏向扩散的证据。结果加强了这样一种观点，即两栖动物种群通常在相对较小的地理距离内高度结构化，即使是在相对较新的殖民地。
Several recent studies have found amphibian populations to be genetically highly structured over rather short geographical distances, and that the rate of genetically effective dispersal may differ between the sexes. However, apart from the common frog (Rana temporaria) little is known about the genetic structuring and sex‐biased dispersal in northern European amphibians. We investigated the patterns of genetic diversity and differentiation within and among Scandinavian populations of the moor frog (Rana arvalis) using microsatellite markers. The genetic diversity within local R. arvalis populations was not a simple linear negative function of latitude but a convex one: genetic diversity peaked in mid‐latitude populations, and declined thereafter dramatically towards the north. The average degree of genetic differentiation among populations (FST = 0.14) was lower than that observed for the common frog (FST = 0.21), though the pattern of isolation by distance was similar for both species. Contrary to common frogs, no evidence for female‐biased dispersal was found. The results reinforce the view that amphibian populations are—in general—highly structured over relatively small geographical distances, even in comparatively recently colonized areas.