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首页> 外文期刊>Canadian Journal of Zoology >Genetic homogeneity of Canadian mainland marten populations underscores the distinctiveness of Newfoundland pine martens (Martes americana atrata)
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Genetic homogeneity of Canadian mainland marten populations underscores the distinctiveness of Newfoundland pine martens (Martes americana atrata)

机译：加拿大大陆貂种群的遗传同质性凸显了纽芬兰松貂（Martes americana atrata）的独特性

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摘要

American pine martens (Martes americana) are mid-sized mustelids found in the boreal and taiga zones of North America that prefer late-successional coniferous forests. Studies have shown that tracts of treeless land and roads may impede marten dispersal and that fewer martens are captured or observed in clear-cut areas. If marten habitat is indeed fragmented by roads and treeless land, this may result in decreased gene flow between regions and therefore in increased levels of genetic structure and decreased genetic variation in regions where these potential barriers are present. In this study, we evaluate the genetic variation and connectivity of marten populations across Canada. Thirty-five regions from the Canadian provinces and territories were sampled, including 1262 individuals, genotyped at 11 microsatellite loci. As expected, and in agreement with previous studies, little genetic structure was observed in northern regions, where few barriers to marten dispersal are thought to exist. However, contrary to our expectations, no strong breaks in gene flow were observed between any of the 35 sampled regions with the exception of the insular Newfoundland population. The lack of genetic structure observed may suggest that, at a larger scale, marten dispersal is not as limited by some landscape features as was previously thought.
机译：美国松貂（Martes americana）是在北美的北方和针叶林地区发现的中型鼬类，较喜欢晚继针叶林。研究表明，大片无树的土地和道路可能会阻碍貂的扩散，在明确的地区捕获或观察到的貂较少。如果貂的栖息地确实被道路和无树的土地所分割，这可能会导致区域之间的基因流动减少，从而导致存在这些潜在障碍的区域中的遗传结构水平增加以及遗传变异减少。在这项研究中，我们评估了加拿大貂貂的遗传变异和连通性。对来自加拿大各省和地区的35个地区进行了采样，包括1262个个体，这些个体在11个微卫星基因座处进行了基因分型。正如预期的，并与先前的研究一致，在北部地区几乎没有观察到遗传结构，认为该地区很少存在貂扩散的障碍。但是，与我们的预期相反，除了纽芬兰岛以外的其他地区，在35个采样区域中均未观察到基因流的强烈中断。缺乏观察到的遗传结构可能表明，在更大的范围内，貂的散布不像以前所认为的那样受到某些景观特征的限制。

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