Conflicting nuclear and mitogenome phylogenies reveal ancient mitochondrial replacement between two North American species of collared lemmings (Dicrostonyx groenlandicus, D. hudsonius).
Conflicting nuclear and mitogenome phylogenies reveal ancient mitochondrial replacement between two North American species of collared lemmings (Dicrostonyx groenlandicus, D. hudsonius).
复制标题
DOI：
10.1016/j.ympev.2022.107399
复制
发表时间：
2022-03
影响因子：
4.1
通讯作者：
Chr Stenseth N
中科院分区：
文献类型：
--
作者：
Fedorov VB;Trucchi E;Goropashnaya AV;Chr Stenseth N
领旅鼠（Dicrostonyx）是一种适应寒冷环境的啮齿动物，是冻原群落的关键动物，也是北极遗传多样性和第四纪古生物学研究的模式动物。我们研究了线粒体和核基因组变异，以重建欧亚大陆的D。torquatus和北美D. groenlandicus、黑腹拟步行虫D. hudsonius，并根据牙齿特征的形态变异，对两次从欧亚大陆向北美殖民的地理学假说进行了评价。核和有丝分裂基因组的同源性支持每个物种的相互单系性，但揭示了物种之间的冲突关系。有丝分裂基因组树可能反映了目前分离的D. groenlandicus和D.哈德森纽斯。核基因组的进化揭示了物种的进化过程，支持了D.具有原始和独特臼齿形态的哈德森牛代表了从欧亚大陆到北美的第一次迁移事件的遗迹。广泛分布于北美北极地区，D. groenlandicus，具有先进的牙齿形态，起源于后来跨越白令陆桥的殖民活动。这项研究显示了两个北极物种之间的古代线粒体捕获，并强调了多位点方法对系统发育推断的重要性。有丝分裂基因组树反映了mtDNA的历史置换，而核基因组同源性揭示了支持D。具有原始臼齿形态的哈德森牛是从欧亚大陆到北美的第一次殖民的遗迹。
Collared lemmings (Dicrostonyx) are cold adapted rodents, keystone animals in the tundra communities and the model taxa in studies of Arctic genetic diversity and Quaternary paleontology. We examined mitochondrial and nuclear genomic variation to reconstruct phylogenetic relationships among the Eurasian D. torquatus and North American D. groenlandicus, D. hudsonius and evaluate biogeographic hypothesis of the two colonization events of North America from Eurasia based on morphological variation in dental traits. The nuclear and mitogenome phylogenies support reciprocal monophyly of each species but reveal conflicting relationships among species. The mitogenome tree likely reflects ancient mitochondrial replacement between currently isolated D. groenlandicus and D. hudsonius. The nuclear genome phylogeny reveals species cladogenesis and supports the hypothesis that D. hudsonius with primitive and distinct molar morphology represents a relic of the first migration event from Eurasia to North America. Species widely distributed in the North American Arctic, D. groenlandicus, with advanced dental morphology originated from a later colonization event across the Bering Land Bridge. This study shows ancient mitochondrial capture between two Arctic species and emphasizes the importance of multilocus approaches for phylogenetic inference. While the mitogenome tree reflects historical mtDNA replacement, the nuclear genome phylogeny reveals evolutionary relationships supporting the hypothesis that D. hudsonius with primitive molar morphology is a relic of the first colonization from Eurasia to North America.
登录
查看更多内容
影响因子：
3.3
作者：
Currat, Mathias;Ruedi, Manuel;Excoffier, Laurent
通讯作者：
Excoffier, Laurent
影响因子：
2.7
作者：
Fedorov, VB;Goropashnaya, AV
通讯作者：
Goropashnaya, AV
DOI：
10.1016/0033-5894(71)90060-3
发表时间：
1971-01-01
期刊：
Quaternary Research (Orlando)
影响因子：
--
作者：
GUTHRIE R D;MATTHEWS J V JR
通讯作者：
MATTHEWS J V JR
影响因子：
56.9
作者：
Hailer, Frank;Kutschera, Verena E.;Janke, Axel
通讯作者：
Janke, Axel
影响因子：
4.9
作者：
Melo-Ferreira, Jose;Seixas, Fernando A.;Alves, Paulo C.
通讯作者：
Alves, Paulo C.