NWIPB OpenIR
History and evolution of alpine plants endemic to the Qinghai-Tibetan Plateau: Aconitum gymnandrum (Ranunculaceae)
Wang, Liuyang1,2; Abbott, Richard J.3; Zheng, Wei2; Chen, Ping2; Wang, Yujin1; Liu, Jianquan1
2009-02-01
发表期刊MOLECULAR ECOLOGY
ISSN0962-1083
卷号18期号:4页码:709-721
文章类型Article
摘要How Quaternary climatic oscillations affected range distributions and intraspecific divergence of alpine plants on the Qinghai-Tibetan Plateau (QTP) remains largely unknown. Here, we report a survey of chloroplast DNA (cpDNA) and nuclear ribosomal internal transcribed spacer (ITS) DNA variation aimed at exploring the phylogeographical history of the QTP alpine endemic Aconitum gymnandrum. We sequenced three cpDNA fragments (rpl20-rps12 intergenic spacer, the trnV intron and psbA-trnH spacer) and also the nuclear (ITS) region in 245 individuals from 23 populations sampled throughout the species' range. Two distinct lineages, with eastern and western geographical distributions respectively, were identified from a phylogenetic analysis of ITS sequence variation. Based on a fast substitution rate, these were estimated to have diverged from each other in the early Pleistocene approximately 1.45 Ma. The analysis of cpDNA variation identified nine chlorotypes that clustered into two major clades that were broadly congruent in geographical distribution with the two ITS lineages. The east-west split of cpDNA divergence was supported by an amova which partitioned approximately half of the total variance between these two groups of populations. Analysis of the spatial distribution of chlorotypes showed that each clade was subdivided into two groups of populations such that a total of four population groups existed in the species. It is suggested that these different groups derive from four independent glacial refugia that existed during the Last Glacial Maximum (LGM), and that three of these refugia were located at high altitude on the QTP platform itself at that time. Coalescent simulation of chlorotype genealogies supported both an early Pleistocene origin of the two main cpDNA clades and also the 'four-refugia' hypothesis during the LGM. Two previous phylogeographical studies of QTP alpine plants indicated that such plants retreated to refugia at the eastern/south-eastern plateau edge during the LGM and/or previous glacial maxima. However, the results for A. gymnandrum suggest that at least some of these cold-tolerant species may have also survived centrally on the QTP platform throughout the Quaternary.; How Quaternary climatic oscillations affected range distributions and intraspecific divergence of alpine plants on the Qinghai-Tibetan Plateau (QTP) remains largely unknown. Here, we report a survey of chloroplast DNA (cpDNA) and nuclear ribosomal internal transcribed spacer (ITS) DNA variation aimed at exploring the phylogeographical history of the QTP alpine endemic Aconitum gymnandrum. We sequenced three cpDNA fragments (rpl20-rps12 intergenic spacer, the trnV intron and psbA-trnH spacer) and also the nuclear (ITS) region in 245 individuals from 23 populations sampled throughout the species' range. Two distinct lineages, with eastern and western geographical distributions respectively, were identified from a phylogenetic analysis of ITS sequence variation. Based on a fast substitution rate, these were estimated to have diverged from each other in the early Pleistocene approximately 1.45 Ma. The analysis of cpDNA variation identified nine chlorotypes that clustered into two major clades that were broadly congruent in geographical distribution with the two ITS lineages. The east-west split of cpDNA divergence was supported by an amova which partitioned approximately half of the total variance between these two groups of populations. Analysis of the spatial distribution of chlorotypes showed that each clade was subdivided into two groups of populations such that a total of four population groups existed in the species. It is suggested that these different groups derive from four independent glacial refugia that existed during the Last Glacial Maximum (LGM), and that three of these refugia were located at high altitude on the QTP platform itself at that time. Coalescent simulation of chlorotype genealogies supported both an early Pleistocene origin of the two main cpDNA clades and also the 'four-refugia' hypothesis during the LGM. Two previous phylogeographical studies of QTP alpine plants indicated that such plants retreated to refugia at the eastern/south-eastern plateau edge during the LGM and/or previous glacial maxima. However, the results for A. gymnandrum suggest that at least some of these cold-tolerant species may have also survived centrally on the QTP platform throughout the Quaternary.
关键词Alpine Plants Coalescent Tests Glacial Refugia Hybridization Pleistocene Divergence Qinghai-tibetan Plateau
WOS标题词Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]CLIMATE-CHANGE ; GENETIC DIFFERENTIATION ; QUATERNARY GLACIATION ; CONCERTED EVOLUTION ; MOLECULAR EVIDENCE ; LIFE-HISTORY ; CHLOROPLAST ; PHYLOGENY ; DNA ; PHYLOGEOGRAPHY
收录类别SCI
语种英语
WOS研究方向Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
WOS记录号WOS:000262782400011
引用统计
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/1900
专题中国科学院西北高原生物研究所
作者单位1.Lanzhou Univ, Inst Mol Ecol, MOE Key Lab Arid & Grassland Ecol, Sch Life Sci, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, NW Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810001, Qinghai, Peoples R China
3.Univ St Andrews, Sch Biol, St Andrews KY16 9TH, Fife, Scotland
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GB/T 7714
Wang, Liuyang,Abbott, Richard J.,Zheng, Wei,et al. History and evolution of alpine plants endemic to the Qinghai-Tibetan Plateau: Aconitum gymnandrum (Ranunculaceae)[J]. MOLECULAR ECOLOGY,2009,18(4):709-721.
APA Wang, Liuyang,Abbott, Richard J.,Zheng, Wei,Chen, Ping,Wang, Yujin,&Liu, Jianquan.(2009).History and evolution of alpine plants endemic to the Qinghai-Tibetan Plateau: Aconitum gymnandrum (Ranunculaceae).MOLECULAR ECOLOGY,18(4),709-721.
MLA Wang, Liuyang,et al."History and evolution of alpine plants endemic to the Qinghai-Tibetan Plateau: Aconitum gymnandrum (Ranunculaceae)".MOLECULAR ECOLOGY 18.4(2009):709-721.
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