Arid
DOI10.1093/aobpla/plx016
Genetic diversity and structure of an endangered desert shrub and the implications for conservation
Su, Zhihao1; Richardson, Bryce A.2; Zhuo, Li3; Jiang, Xiaolong4; Li, Wenjun1; Kang, Xiaoshan1
通讯作者Su, Zhihao
来源期刊AOB PLANTS
ISSN2041-2851
出版年2017
卷号9
英文摘要

Population genetic information can provide valuable insight for the conservation and management of threatened and endangered plant species. Tamarix taklamakanensis is an endangered shrub endemic to arid basins of northwestern China. This species serves to stabilize soils in this region, but has seen substantial loss in its abundance due to depletion of ground water. The populations of this species have become small and fragmented, warranting conservation. Seven microsatellite loci were used to assess the genetic diversity and structure of 15 populations in the Tarim Basin, China. Among populations, the expected heterozygosity and total gene diversity were both moderate (H-E = 0.392, h(T) = 0.432), however the allelic diversity was low (A = 2.4). Eleven populations were detected to have experienced recent bottlenecks using Wilcoxon’s test and a model-shift test. Most populations of T. taklamakanensis in the centre of Tarim Basin showed low levels of genetic differentiation, but higher levels in geographically outlying populations. Genetic structure based on Bayesian assignment, the neighbour-joining network and principal coordinates analyses produced similar results, supporting five groups in the Tarim Basin. Gene flow was high among Bayesian groups based on historical gene flow estimated by private alleles. The genetic structure of T. taklamakanensis supports a pattern where gene flow principally occurs along river corridors through hydrochory of seeds and insect-mediated pollination. Populations upstream have contributed to a more diverse mixture of populations near the confluence of several rivers near the centre of Tarim Basin. This pattern of genetic structure could be influenced by the flow of water from different river systems. Conservation efforts should focus on fostering the regeneration of this species, maintaining genetic diversity and preserving the extant genetic structure. Conservation efforts are contingent upon maintaining ground water and streamflows in this arid basin.


英文关键词Conservation gene flow genetic drift hydrochory Tamarix taklamakanensis Tarim Basin
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000410134500003
WOS关键词RECENT POPULATION BOTTLENECKS ; ALLELE FREQUENCY DATA ; DEMOGRAPHIC BOTTLENECKS ; MICROSATELLITE ANALYSIS ; FRAGMENTED POPULATIONS ; REPRODUCTIVE SUCCESS ; FOREST FRAGMENTATION ; REMNANT POPULATIONS ; MATING PATTERNS ; PLANT
WOS类目Plant Sciences ; Ecology
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology
来源机构中国科学院新疆生态与地理研究所 ; E18
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/197359
作者单位1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, 818 South Beijing Rd, Xinjiang 830011, Urumqi, Peoples R China;
2.US Forest Serv, USDA, Rocky Mt Res Stn, 735 North 500 East, Provo, UT 84606 USA;
3.Xinjiang Normal Univ, Lib, Urumqi 830054, Peoples R China;
4.Chinese Acad Sci, Shanghai Chenshan Bot Garden, Shanghai Chenshan Plant Sci Res Ctr, Shanghai 201602, Peoples R China
推荐引用方式
GB/T 7714
Su, Zhihao,Richardson, Bryce A.,Zhuo, Li,et al. Genetic diversity and structure of an endangered desert shrub and the implications for conservation[J]. 中国科学院新疆生态与地理研究所, E18,2017,9.
APA Su, Zhihao,Richardson, Bryce A.,Zhuo, Li,Jiang, Xiaolong,Li, Wenjun,&Kang, Xiaoshan.(2017).Genetic diversity and structure of an endangered desert shrub and the implications for conservation.AOB PLANTS,9.
MLA Su, Zhihao,et al."Genetic diversity and structure of an endangered desert shrub and the implications for conservation".AOB PLANTS 9(2017).
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