Mitochondrial genomes of Late Pleistocene caballine horses from China belong to a separate clade

	Mitochondrial genomes of Late Pleistocene caballine horses from China belong to a separate clade
	Yuan, Junxia 4,5; Sheng, Guilian 4; Preick, Michaela 3; Sun, Boyang 2; Hou, Xindong 4; Chen, Shungang 5; Taron, Ulrike Helene 3; Barlow, Axel 1,3; Wang, Linying 5; Hu, Jiaming 4
刊名	QUATERNARY SCIENCE REVIEWS
	2020-12-15
卷号	250 页码:8
关键词	Equus dalianensis Equus przewalskii Pleistocene caballine horses Ancient DNA Phylogenetic relationship Divergence time
ISSN号	0277-3791
通讯作者	Yuan, Junxia(yuanjx@cug.edu.cn) ; Hofreiter, Michael(michael.hofreiter@uni-potsdam.de)
英文摘要	There were several species of Equus in northern China during the Late Pleistocene, including Equus przewalskii and Equus dalianensis. A number of morphological studies have been carried out on E. przewalskii and E. dalianensis, but their evolutionary history is still unresolved. In this study, we retrieved near-complete mitochondrial genomes from E. dalianensis and E. przewalskii specimens excavated from Late Pleistocene strata in northeastern China. Phylogenetic analyses revealed that caballoid horses were divided into two subclades: the New World and the Old World caballine horse subclades. The Old World caballine horses comprise of two deep phylogenetic lineages, with modern and ancient Equus caballus and modern E. przewalskii forming lineage I, and the individuals in this study together with one Yakut specimen forming lineage II. Our results indicate that Chinese Late Pleistocene caballoid horses showed a closer relationship to other Eurasian caballine horses than that to Pleistocene horses from North America. In addition, phylogenetic analyses suggested a close relationship between E. dalianensis and the Chinese fossil E. przewalskii, in agreement with previous researches based on morphological analyses. Interestingly, E. dalianensis and the fossil E. przewalskii were intermixed rather than split into distinct lineages, suggesting either that gene flow existed between these two species or that morphology-based species assignment of palaeontological specimens is not always correct. Moreover, Bayesian analysis showed that the divergence time between the New World and the Old World caballoid horses was at 1.02 Ma (95% CI: 0.86-1.24 Ma), and the two Old World lineages (I & II) split at 0.88 Ma (95% CI: 0.69-1.13 Ma), which indicates that caballoid horses seem to have evolved into different populations in the Old World soon after they migrated from North America via the Bering Land Bridge. Finally, the TMRCA of E. dalianensis was estimated at 0.20 Ma (95% CI: 0.15-0.28 Ma), and it showed a relative low genetic diversity compared with other Equus species. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[41472014] ; National Natural Science Foundation of China[41672017] ; PPP project - China Scholarship Council ; PPP project - DAAD, Germany - German Academic Exchange Service[2016-2041]
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000595941500009
资助机构	National Natural Science Foundation of China ; PPP project - China Scholarship Council ; PPP project - DAAD, Germany - German Academic Exchange Service
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/18818]
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Yuan, Junxia; Hofreiter, Michael
作者单位	1.Nottingham Trent Univ, Sch Sci & Technol, Clifton Lane, Nottingham NG11 8NS, England 2.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, IVPP, Beijing 100044, Peoples R China 3.Univ Potsdam, Inst Biochem & Biol, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany 4.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China 5.China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Junxia,Sheng, Guilian,Preick, Michaela,et al. Mitochondrial genomes of Late Pleistocene caballine horses from China belong to a separate clade[J]. QUATERNARY SCIENCE REVIEWS,2020,250:8.
APA	Yuan, Junxia.,Sheng, Guilian.,Preick, Michaela.,Sun, Boyang.,Hou, Xindong.,...&Hofreiter, Michael.(2020).Mitochondrial genomes of Late Pleistocene caballine horses from China belong to a separate clade.QUATERNARY SCIENCE REVIEWS,250,8.
MLA	Yuan, Junxia,et al."Mitochondrial genomes of Late Pleistocene caballine horses from China belong to a separate clade".QUATERNARY SCIENCE REVIEWS 250(2020):8.