Genetic structure of the endangered, relict shrub Amygdalus mongolica (Rosaceae) in arid northwest China
文献类型： 外文期刊
作者： Ma, Song Mei 1 ; Nie, Ying Bin 2 ; Jiang, Xiao Long 3 ; Xu, Zhe 5 ; Ji, Wan Quan 6 ;
作者机构： 1.Shihezi Univ, Coll Sci, Shihezi 832000, Xinjiang, Peoples R China
2.Xinjiang Acad Agrireclamat Sci, Inst Crop Res, Shihezi 832000, Xinjiang, Peoples R China
3.Shanghai Chenshan Bot Garden, Shanghai Key Lab Plant Funct Genom & Resources, Shanghai 201602, Peoples R China
4.Chinese Acad Sci, Shanghai Chenshan Plant Sci Res Ctr, Shanghai 201602, Peoples R China
5.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China
6.Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
关键词： demography; genetic differentiation; refugia
期刊名称：AUSTRALIAN JOURNAL OF BOTANY （ 影响因子：1.237； 五年影响因子：1.394 ）
ISSN： 0067-1924
年卷期： 2019 年 67 卷 2 期
页码：
收录情况： SCI
摘要： In the present study we selected the endangered species Amygdalus mongolica to investigate the influence of climatic fluctuations on the spatial genetic patterns and evolutionary history of organisms in arid northwest China. The intraspecific genetic variation and demographic history of A. mongolica were investigated using two cpDNA sequences (psbK-psbI and trnL-trnF) from 174 individuals in 15 populations across most of its covered range. Significant genetic differentiation among populations was identified, which resulted from fragmented populations coupled with the enhanced aridification and desertification of the Pleistocene. Twelve haplotypes clustered into two clades, corresponding to the Western region (northernmost Gansu, Hexi Corridor and Alxa Left Banner) and the Eastern region (Urad Houqi, Yinshan Mountains, Urad Zhongqi and Daqing Mountains) respectively. Five independent Pleistocene refugia in different mountainous areas were identified. Amygdalus mongolica has likely experienced westward shifts from refugia along the margins of the Ulanbuhe and Tengger deserts, and also postglacial re-colonisation northward along the Hexi Corridor.
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