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首页> 外文期刊>Zoological Science >Evidence for cryptic genetic discontinuity in a recently expanded sika deer population on the Boso Peninsula, central Japan
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Evidence for cryptic genetic discontinuity in a recently expanded sika deer population on the Boso Peninsula, central Japan

机译：日本中部Boso半岛最近增加的梅花鹿种群中隐性遗传不连续的证据

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摘要

The genetic structure of populations is not necessarily reflected in the geographical proximity of individuals, because environmental gradients such as those of vegetation or climate can function as cryptic barriers to gene flow. We examined polymorphisms at nine microsatellite loci to determine and discuss whether a distinctive genetic structure was detectable in a spatially continuous population of the sika deer (Cervus nippon) on the Boso Peninsula of central Japan. Spatially explicit Bayesian analysis revealed that two genetically distinctive clusters exist in the Boso population. The spatial boundary of the two clusters approximately conformed to the border defined previously from a mitochondrial DNA dataset. By combining information on the geomorphic features surrounding the boundary and that on the lineage of 1970s population, we propose a schematic scenario for characterizing the population genetic structure to the present. The current population consists of genetically different lineages, and spatially discontinuous clusters have come into contact in the vicinity of a local road running along a steep-walled ravine that could act as principal barrier to gene flow. Biological factors such as distribution of vegetation and philopatric behavior might also have helped strengthen the cryptic genetic structure of the Boso population.
机译：种群的遗传结构不一定反映在个体的地理位置上，因为环境梯度（例如植被或气候梯度）可以充当基因流动的隐性屏障。我们检查了九个微卫星基因座的多态性，以确定并讨论了在日本中部Boso半岛的梅花鹿（日本鹿）的空间连续种群中是否可检测到独特的遗传结构。空间上明确的贝叶斯分析表明，在Boso种群中存在两个遗传上不同的簇。两个簇的空间边界大致符合先前从线粒体DNA数据集中定义的边界。通过结合边界周围的地貌特征和1970年代人口血统的信息，我们提出了一个表征当前人口遗传结构的示意图。当前的种群由遗传上不同的谱系组成，空间不连续的簇群在一条沿陡壁沟壑延伸的局部道路附近接触，这可能成为基因流动的主要障碍。诸如植被分布和哲学行为等生物学因素也可能有助于加强Boso种群的隐秘遗传结构。

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