From East Asia to Beringia: reconstructed range dynamics of Geranium erianthum (Geraniaceae) during the last glacial period in the northern Pacific region
From East Asia to Beringia: reconstructed range dynamics of Geranium erianthum (Geraniaceae) during the last glacial period in the northern Pacific region
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DOI：
10.1007/s00606-022-01820-4
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发表时间：
2022-07
影响因子：
1.9
通讯作者：
Seikan Kurata;S. Sakaguchi;H. Ikeda;Shun K. Hirota;Osamu Kurashima;Y. Suyama;M. Ito
中科院分区：
文献类型：
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作者：
Seikan Kurata;S. Sakaguchi;H. Ikeda;Shun K. Hirota;Osamu Kurashima;Y. Suyama;M. Ito
大蓟是一种生长在干燥生境的高山植物，分布于东亚至北方太平洋的北方沿海地区。目前白令海峡周围的无冰区（即，Beringia）在一些高山植物向东亚和北美等邻近地区的分布扩展中发挥了重要作用。但最近的研究表明，雪床环境中的一些高山植物从东亚扩散到北方太平洋的北方沿海地区。本研究以中国南方红豆杉为研究对象，研究了中国南方红豆杉种群间的系统发育关系和遗传分化。利用叶绿体基因组和单核苷酸多态性技术，对白令海、不列颠哥伦比亚省或东亚可能是其分布起源地的不同地理假说进行了评价。基于叶绿体基因组系统发育树的范围重建表明G.毛茛属及近缘种起源于东亚，其中毛茛属G.埃里温向东迁移到白令海和不列颠哥伦比亚省。此外，核全基因组SNPs表明，没有显着的遗传分化之间检测到日本和柏林的人口。缺乏遗传分化表明，目前的G。erianthum是由最后一次冰期后期的快速范围扩张造成的。总体而言，东亚避难所假说适用于高山植物。erianthumin干燥的栖息地，表明从东亚到北方太平洋的范围扩展模式可能是更常见的，而不是有限的雪床物种。
Geranium erianthumis an alpine plant growing in dry habitats, which is distributed from East Asia to northern coastal regions of the northern Pacific. The ice-free area around the current Bering Strait (i.e., Beringia) had played an important role in range expansion into neighboring regions such as East Asia and North America for some alpine plants. However, recent studies suggest that some alpine plants in snowbed environment spread from East Asia to northern coastal regions of the northern Pacific. In this study, we investigated phylogenetic relationships and genetic differentiations among populations ofG. erianthumand the related species using the chloroplast genome and single-nucleotide polymorphisms, to evaluate the alternative biogeographic hypotheses in which region of Beringia, British Columbia or East Asia is probable for its distributional origin. Range reconstruction based on phylogenetic tree of chloroplast genome indicatedG. erianthumand related species originated in East Asia, from whereG. erianthummigrated eastward into Beringia and British Columbia. In addition, nuclear genome-wide SNPs indicated that no significant genetic differentiation was detected between Japanese and Beringian populations. The lack of genetic differentiation suggests that the current range ofG. erianthumresulted from rapid range expansion during the latter period of the last glacial era. Overall, the East Asian refugium hypothesis was applicable to the alpine plantG. erianthumin dry habitat, indicating that range expansion pattern from East Asia into the northern Pacific may be more common rather than limited for snowbed species.