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题名: Pleistocene climate change promoted divergence between Picea asperata and P. crassifolia on the Qinghai-Tibet Plateau through recent bottlenecks
作者: Bi, H; Yue, W; Wang, X; Zou, JB; Li, LL; Liu, JQ(刘建全); Sun, YS
收录类别: SCIE ; MEDLINE
出版日期: 2016-07
刊名: ECOLOGY AND EVOLUTION
卷号: 6, 期号:13, 页码:4435-4444
英文摘要: Divergence during the early stage of speciation can be driven by a population bottleneck via reduced gene flow and enhanced lineage sorting. In this study, we aimed to examine whether such bottlenecks occurred during the initial speciation of two closely related spruce species Picea asperata and P. crassifolia occurring on the Qinghai-Tibet Plateau (QTP). We analyzed sequences of three chloroplast, two mitochondrial DNA fragments and a further 13 nuclear loci from 216 individuals of the two species. Both species showed a low level of genetic diversity in contrast to other congeners occurring in the QTP and adjacent regions. The estimated population sizes of P. asperata and P. crassifolia are less than the ancestral population size before splitting. These results together with multiple statistical tests (Tajima's D, Fu and Li's D* and F*) suggest that these two species underwent recent bottlenecks. Based on approximate Bayesian computation (ABC), we also determined that the period of the population shrinkage was consistent with the interspecific divergence during the late Pleistocene. The reduced population sizes and the divergent selection may together have triggered the initial divergence under high gene flow between these two species. Our results therefore highlight the importance of climatic oscillations during the late Pleistocene in promoting speciation through changing demographic sizes of the ancestral species on the QTP and in adjacent regions.
关键词: Bottlenecks ; Picea ; Pleistocene climate change ; Qinghai-Tibet Plateau ; species divergence
作者部门: [Bi, Hao ; Liu, Jianquan ; Sun, Yongshuai] Sichuan Univ, Coll Life Sci, MOE Key Lab Bioresources & Ecoenvironm, Chengdu 610065, Peoples R China ; [Yue, Wei ; Wang, Xi ; Zou, Jiabin ; Li, Lili ; Liu, Jianquan] Lanzhou Univ, Coll Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China ; Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Peoples R China
通讯作者: Sun, YS (reprint author), Chinese Acad Sci, Xishuangbanna Trop Bot Garden, 88 Xuefu Rd, Kunming 650223, Peoples R China.
学科分类: Environmental Sciences & Ecology; Evolutionary Biology
文章类型: Article
所属项目编号: National Key Project for Basic Research [2014CB954100] ; National Natural Science Foundation of China [3159820011, 31300559]
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
项目资助者: NSFC ; MOST
语种: 英语
DOI: 10.1002/ece3.2230
ISSN号: 2045-7758
WOS记录号: WOS:000379344400016
PM记录号: 27386086
IR记录号: WOS:000379344400016
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/182036
Appears in Collections:生命科学学院_期刊论文

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Recommended Citation:
Bi, H,Yue, W,Wang, X,et al. Pleistocene climate change promoted divergence between Picea asperata and P. crassifolia on the Qinghai-Tibet Plateau through recent bottlenecks[J]. ECOLOGY AND EVOLUTION,2016,6(13):4435-4444.
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