文献类型：期刊文献

英文题名：Multilocus analysis of nucleotide variation and speciation in three closely related Populus (Salicaceae) species

作者：Du, Shuhui[1,2] Wang, Zhaoshan[1,3] Ingvarsson, Park[4] Wang, Dongsheng[1] Wang, Junhui[1] Wu, Zhiqiang[5] Tembrock, Luke R.[5] Zhang, Jianguo[1,3]

第一作者：Du, Shuhui

通信作者：Zhang, JG[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Silviculture State Forestry Adm, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Shandong Agr Univ, Coll Forestry, Tai An 271000, Shandong, Peoples R China;[3]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry South, Nanjing 210000, Jiangsu, Peoples R China;[4]Umea Univ, Umea Plant Sci Ctr, Dept Ecol & Environm Sci, S-90187 Umea, Sweden;[5]Colorado State, Dept Biol, Ft Collins, CO 80523 USA

年份：2015

卷号：24

期号：19

起止页码：4994-5005

外文期刊名：MOLECULAR ECOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000362194900013)】；

基金：We thank Master Li Shanshan, Ye Zhanyang and Li Yunxiao for data submission and phylogeny analysis. We thank Dr. Duan Aiguo, Bao Erjiang, Abuduhamiti, Zeng Yanfei, He Caiyun, Liu Juanjuan, Rao Guodong and Zhang Xiongqing for sample collection. We thank Dr. Ge Song, Dr. Cai Zhe and Dr. Liu Rong in the State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, China, for their suggestion on data analysis. We appreciate two anonymous reviewers who provided valuable advice on this study. Financial support for this research was provided by the National Natural Science Foundation of China (No. 31470665) and Beijing Co-building Plan for Scientific Research and Postgraduate Education.

语种：英文

外文关键词：nucleotide differentiation; nucleotide variation; Populus; speciation; vicariance

摘要：Historical tectonism and climate oscillations can isolate and contract the geographical distributions of many plant species, and they are even known to trigger species divergence and ultimately speciation. Here, we estimated the nucleotide variation and speciation in three closely related Populus species, Populus tremuloides, P.tremula and P.davidiana, distributed in North America and Eurasia. We analysed the sequence variation in six single-copy nuclear loci and three chloroplast (cpDNA) fragments in 497 individuals sampled from 33 populations of these three species across their geographic distributions. These three Populus species harboured relatively high levels of nucleotide diversity and showed high levels of nucleotide differentiation. Phylogenetic analysis revealed that P.tremuloides diverged earlier than the other two species. The cpDNA haplotype network result clearly illustrated the dispersal route from North America to eastern Asia and then into Europe. Molecular dating results confirmed that the divergence of these three species coincided with the sundering of the Bering land bridge in the late Miocene and a rapid uplift of the Qinghai-Tibetan Plateau around the Miocene/Pliocene boundary. Vicariance-driven successful allopatric speciation resulting from historical tectonism and climate oscillations most likely played roles inthe formation of the disjunct distributions and divergence of these three Populus species.