文献类型：期刊文献

英文题名：Phylogeographic patterns of the desert poplar in Northwest China shaped by both geology and climatic oscillations

作者：Zeng, Yan-Fei[1] Zhang, Jian-Guo[1,2,3] Abuduhamiti, Bawerjan[4] Wang, Wen-Ting[5] Jia, Zhi-Qing[6]

第一作者：曾艳飞

通信作者：Zhang, JG[1];Zhang, JG[2];Zhang, JG[3]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, 1 Dongxiaofu,Xiangshan Rd, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry South, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat, 1 Dongxiaofu,Xiangshan Rd, Beijing 100091, Peoples R China;[4]Forest Res Inst Altai Reg, 93 Jiefang South Rd, Altai 836500, Xinjiang, Peoples R China;[5]Northwest Univ Nationalities, Sch Math & Comp Sci, 1 Northwest New Village, Lanzhou 730030, Gansu, Peoples R China;[6]Chinese Acad Forestry, Inst Desertificat Studies, Xiangshan Rd, Beijing 100091, Peoples R China

年份：2018

卷号：18

期号：1

外文期刊名：BMC EVOLUTIONARY BIOLOGY

收录：;Scopus(收录号：2-s2.0-85047651668);WOS:【SCI-EXPANDED(收录号:WOS:000433245500001)】；

基金：This project was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of Chinese Academy of Forestry (RIF2008-02) to YFZ; WTW was supported by the National Natural Science Foundation of China (31560127); the publication of this article was in part funded by the National Natural Science Foundation of China (31670666).

语种：英文

外文关键词：Arid northwest China; Climatic oscillations; Desert poplar; Ecological Niche Modeling; Phylogeography; Tianshan Mountains

摘要：Background: The effects of historical geology and climatic events on the evolution of plants around the Qinghai-Tibetan Plateau region have been at the center of debate for years. To identify the influence of the uplift of the Tianshan Mountains and/or climatic oscillations on the evolution of plants in arid northwest China, we investigated the phylogeography of the Euphrates poplar (Populus euphratica) using chloroplast DNA (cpDNA) sequences and nuclear microsatellites, and estimated its historical distribution using Ecological Niche Modeling (ENM). Results: We found that the Euphrates poplar differed from another desert poplar, P. pruinosa, in both nuclear and chloroplast DNA. The low clonal diversity in both populations reflected the low regeneration rate by seed/seedlings in many locations. Both cpDNA and nuclear markers demonstrated a clear divergence between the Euphrates poplar populations from northern and southern Xinjiang regions. The divergence time was estimated to be early Pleistocene based on cpDNA, and late Pleistocene using an Approximate Bayesian Computation analysis based on microsatellites. Estimated gene flow was low between these two regions, and the limited gene flow occurred mainly via dispersal from eastern regions. ENM analysis supported a wider distribution of the Euphrates poplar at 3 Ma, but a more constricted distribution during both the glacial period and the interglacial period. Conclusions: These results indicate that the deformation of the Tianshan Mountains has impeded gene flow of the Euphrates poplar populations from northern and southern Xinjiang, and the distribution constriction due to climatic oscillations further accelerated the divergence of populations from these regions. To protect the desert poplars, more effort is needed to encourage seed germination and seedling establishment, and to conserve endemic gene resources in the northern Xinjiang region.