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首页> 外文期刊>Zoological Science >Phylogeography of the Salmonid Fish, Dolly Varden Salvelinus malma: Multiple Glacial Refugia in the North Pacific Rim
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Phylogeography of the Salmonid Fish, Dolly Varden Salvelinus malma: Multiple Glacial Refugia in the North Pacific Rim

机译：鲑鱼多莉瓦尔登Salvelinus哺乳动物的系统志：北太平洋沿岸的多个冰川避难所

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摘要

The geographic distribution pattern of mitochondrial DNA (control region) sequence polymorphisms from 73 populations of a salmonid fish, Dolly Varden Salvelinus malma, over most of its range in the North Pacific rim, was examined to assess how its spatial population genetic structure has been molded. The observed 68 haplotypes were grouped into three main lineages, which correspond to western, central, and eastern regions in the North Pacific. The two outlier-haplotype groups gave close agreement with DNA types from two congeneric species, white-spotted charr S. leucomaenis and Arctic charr S. alpinus, respectively. These results suggest that the present-day genetic structure of S. malma reflects historical patterns of isolation and re-colonization, and also historical hybridization with co-distributed species. We also placed the haplotypes of S. malma within our study areas into a pre-existing evolutionary relationship of S. alpinus and S. malma throughout the Northern Hemisphere. Phylogenetic analysis revealed that the Western Lineage S. malma was basal to all other lineages of S. malma and S. alpinus. Our data serve as a biogeographic hypothesis for salmonid fishes that the Sea of Japan and/ or Sea of Okhotsk regions represents a place of origin for S. malma and S. alpinus groups currently distributed in circumpolar regions.
机译：在北太平洋边缘的大部分范围内，对来自73个鲑鱼鱼多莉·瓦尔登·萨维林纳斯·马尔玛（Dolly Varden Salvelinus malma）的线粒体DNA（控制区）序列多态性的地理分布模式进行了研究，以评估其空间种群遗传结构的形成方式。观察到的68个单倍型被分为三个主要谱系，分别对应于北太平洋的西部，中部和东部地区。这两个离群单倍型群体分别与两种同属物种的DNA类型密切相关，这两种物种分别是白斑的Charr。leucomaenis和北极charr。S. alpinus。这些结果表明，当今的马尔玛链球菌的遗传结构反映了分离和重新定殖的历史模式，以及与共同分布物种的历史杂交。我们还将研究范围内的马尔玛链霉菌的单倍型置于整个北半球的阿尔卑斯链霉菌和马尔玛链霉菌的已有进化关系中。系统发育分析表明，西方血统的S. malma是S. malma和S. alpinus的所有其他血统的基础。我们的数据为鲑鱼的生物地理学假设，即日本海和/或鄂霍次克海地区代表了目前分布在极地地区的马尔玛链球菌和高山链球菌的起源地。

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