文献类型：期刊文献

英文题名：Genetic diversity patterns in an endangered desert shrub from north-western China: implications for conservation

作者：Su, Zhihao[1,2] Wang, Liuqiang[3] Zhuo, Li[4] Jiang, Xiaolong[5] Li, Wenjun[1]

第一作者：Su, Zhihao

通信作者：Su, ZH[1];Su, ZH[2];Wang, LQ[3]

机构：[1]Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[4]Xinjiang Normal Univ, Lib, Urumqi 830054, Peoples R China;[5]Chinese Acad Sci, Shanghai Chenshan Bot Garden, Shanghai Chenshan Plant Sci Res Ctr, Shanghai 201602, Peoples R China

年份：2019

卷号：67

期号：6-7

起止页码：571-584

外文期刊名：AUSTRALIAN JOURNAL OF BOTANY

收录：;Scopus(收录号：2-s2.0-85077191383);WOS:【SCI-EXPANDED(收录号:WOS:000503790300013)】；

基金：This research was supported by grants from National Natural Science Foundation of China (31770703; U1803103; 31600447), and was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2018QB002). We thank the USDA Forest Service, Rocky Mountain Research Station for the technical assistance.

语种：英文

外文关键词：aridification; genetic differentiation; hydrochory; Tamarix taklamakanensis; Tarim Basin

摘要：Tamarix taklamakanensis is an endangered shrub endemic to the Tarim Basin and adjacent Kumtag Desert in north-western China. Here, we used two chloroplast DNA sequences, namely, psbA-trnH and trnS- trnG, to examine the genetic diversity patterns of this species across its entire covered range. A total of nineteen haplotypes were detected. The total gene diversity within the species is high. Genetic variation mainly occurred among populations, SAMOVA groups, and geographic regions. The test for isolation-by-distance showed a significant correlation between genetic and geographical distances, and the genetic landscape shape analysis showed a significant genetic divergence between the Tarim Basin and Kumtag Desert. T. taklamakanensis likely had a potential geographic range during the Last Glacial Maximum period that was much smaller than the present range predicted by ecological niche modelling. The cold and dry climate during the glacial periods of the Quaternary might be a driver of the genetic isolation and divergence detected within T. taklamakanensis, and climatic oscillations might account for the habitat fragmentation of the species. Within the inner of the basin, populations have a higher level of genetic diversity and harbor most of this genetic diversity, thus a nature reserves should be set up in this area for the in situ conservation. In addition, five genetically distinct groups within T. taklamakanensis should be treated as different management units (MUs) when implementing conservation activities.