Effects of Isolation by Continental Islands in the Seto Inland Sea, Japan, on Genetic Diversity of the Large Japanese Field Mouse, Apodemus speciosus (Rodentia: Muridae), Inferred from the Mitochondrial Dloop Region
Effects of Isolation by Continental Islands in the Seto Inland Sea, Japan, on Genetic Diversity of the Large Japanese Field Mouse, Apodemus speciosus (Rodentia: Muridae), Inferred from the Mitochondrial Dloop Region
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DOI：
10.2108/zs160113
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发表时间：
2017-04
影响因子：
0.9
通讯作者：
J. Sato;Yurina Tasaka;Ryoya Tasaka;Kentaro Gunji;Yuya Yamamoto;Y. Takada;Y. Uematsu;E. Sakai;T. Tateishi;Y. Yamaguchi
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文献类型：
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作者：
J. Sato;Yurina Tasaka;Ryoya Tasaka;Kentaro Gunji;Yuya Yamamoto;Y. Takada;Y. Uematsu;E. Sakai;T. Tateishi;Y. Yamaguchi
为了研究冰后期岛屿隔离对日本大田鼠种群遗传多样性和分化的影响，我们检测了线粒体Dloop区（约100 bp）的部分核苷酸序列。300 bp），在日本列岛西部的本州岛和四国岛的濑户内海岛屿和邻近地区采集的231个个体中进行了分析。分子系统发育和网络分析表明，在每个岛屿的单倍型倾向于形成单系群，而那些在本州和四国（日本主要岛屿）显示分散的关系，并与岛屿单倍型连接。这些观察结果表明，一组本州和四国单倍型成为岛上人口的祖先血统。没有基因流的岛屿种群之间进行检测，表明独立的进化发生在每个岛屿，没有人类活动的影响，因为在全新世的岛屿建立。各岛屿的群体遗传多样性均低于本州和四国。遗传多样性和岛屿面积大小之间的比较显示出正相关性，并支持遗传漂变是一个主要因素，塑造了目前的单倍型构成的岛屿在濑户内海的建议。
To study the effects of post-glacial isolation by islands on population genetic diversity and differentiation of the large Japanese field mouse, Apodemus speciosus, we examined partial nucleotide sequences of the mitochondrial Dloop region (ca. 300 bp) in 231 individuals collected from islands in the Seto Inland Sea and adjacent regions on Honshu and Shikoku Islands in the western part of the Japanese archipelago. Molecular phylogenetic and network analyses showed that haplotypes in each island tended to form monophyletic groups, while those in Honshu and Shikoku (the major Japanese islands) showed scattered relationships and were connected with island haplotypes. These observations suggest that a set of Honshu and Shikoku haplotypes became the ancestral lineages of the island population. No gene flow was detected among island populations, indicating that independent evolution occurred on each island, without the influence of human activities, since the establishment of the islands in the Holocene. Population genetic diversities on each island were lower than those on Honshu and Shikoku. Comparison between genetic diversity and island area size showed positive correlations and supported the suggestion that genetic drift is a major factor that shaped the current haplotype constitution of the islands in the Seto Inland Sea.