Extensive Introgression of Mitochondrial DNA Found between two Genetically Divergent Forms of Threespine Stickleback, Gasterosteus Aculeatus, around Japan
Extensive Introgression of Mitochondrial DNA Found between two Genetically Divergent Forms of Threespine Stickleback, Gasterosteus Aculeatus, around Japan
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在日本各地的两种遗传上不同的三刺鱼（Gasterosteus Aculeatus）之间发现了广泛的线粒体 DNA 渗入
DOI：
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发表时间：
2001
影响因子：
1.4
通讯作者：
A. Goto
中科院分区：
文献类型：
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作者：
Miho Yamada;M. Higuchi;A. Goto
对日本海域和太平洋海域的15个棘腹鱼群体的遗传结构和系统发育关系进行了研究。线粒体ND 5/6基因的PCR-RFLP分析表明，该群体存在两个主要的分化分支：（1）阿拉斯加群体;（2）俄罗斯和日本群体。日本种群明显分为G. aculeatus种群和'hariyo'（G. aculeatus leiurus）。然而，日本G。aculeatus种群不支持等位酶分析所显示的日本海型和太平洋型之间的遗传分化。这表明，两种形式之间的mtDNA基因型相似性可能是由于mtDNA从一种形式完全替换为另一种形式。线粒体DNA的渐渗可能有两个方向：从日本海型向太平洋型和从太平洋型向日本海型。在本研究中观察到的每个群体的单倍型组成表明，第二个方向更有可能。这两种形式的种群之间每代雌性的迁移数量（Nm）相当大（9.083-无穷大），表明基因流动正在种群之间发生，或者可能直到最近几年才发生。
The genetic structure and phylogenetic relationships of Gasterosteus aculeatus around Japan were investigated for 15 populations of the Japan Sea and Pacific Ocean forms previously detected by allozyme analyses. PCR-RFLP analysis of mtDNA ND5/6 gene indicated two major divergent clades: (1) Alaskan population and (2) Russian and Japanese populations. Japanese populations were clearly subdivided into G. aculeatus populations and ‘hariyo’ (G. aculeatus leiurus). However, the relationships among Japanese G. aculeatus populations did not support the genetic divergence between Japan Sea and Pacific Ocean forms shown by allozyme analyses. This suggests that mtDNA genetype similarity between the two forms could have resulted from complete replacement of mtDNA from one form to the other. MtDNA introgression is possible in two direction: from Japan Sea form to Pacific Ocean form and the reverse. The haplotype composition of each population observed in the present study suggests that the second direction is more likely. The migrant number of females per generation (Nm) between populations of the two forms was remarkablely large (9.083–infinite), suggesting that gene flow is taking place between the populations at the present time or might have occurred until recent years.
影响因子：
3.3
作者：
M. Nei;F. Tajima
通讯作者：
M. Nei;F. Tajima