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题名: Genetic structure and historical demography of Schizothorax nukiangensis (Cyprinidae) in continuous habitat
作者: Chen, Weitao1, 2; Du, Kang1, 2; He, Shunping1
通讯作者: He, SP (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei, Peoples R China.
关键词: Expansion event ; genetic structure ; isolated by distance ; Nujiang River ; population bottleneck ; Schizothorax nukiangensis
刊名: ECOLOGY AND EVOLUTION
发表日期: 2015-02-01
DOI: 10.1002/ece3.1413
卷: 5, 期:4, 页:984-995
收录类别: SCI
文章类型: Article
部门归属: [Chen, Weitao ; Du, Kang ; He, Shunping] Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei, Peoples R China ; [Chen, Weitao ; Du, Kang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Ecology
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Geographic distance, different living habitats or Pleistocene climatic oscillations have frequently been found to shape population genetic structure in many species. The genetic structure of Schizothorax nukiangensis, a high altitude, valuable fish species, which is distributed throughout the Nujiang River, was investigated by mitochondrial DNA sequence analysis. The cytochrome c oxidase subunit I (COI), cytochrome b (cytb), and the mitochondrial control region (MCR) of S. nukiangensis were concatenated for examination of population structure and demographic history. The concatenated data set (2405bp) implied a pronounced genetic population structure (overall F-ST=0.149) and defined two population units. Strong differentiation was detected between the Sanjiangkou (SJK) population and other populations due to environmental heterogeneity, dispersal ability, and/or glacial cycles. Additional DNA sequencing of the nuclear RAG2 gene also examined significant differentiation between two units and between SJK and the upstream populations (U-unit). Recent expansion events suggest that S. nukiangensis may have undergone a rapid increase during warm interglacial periods. Surprisingly, S.nukiangensis appears to have undergone an obvious expansion during the last glaciations (LG) for cold hardiness and a sharp contraction from 1.5ka to the present. However, two population units exhibited different reflections during the LG, which might be closely related to their living habitats and cold hardiness. A clear pattern of isolation by distance was detected in S.nukiangensis due to feeding habits, limited dispersal ability, and/or philopatry. It is vitally important that more attention be given to S.nukiangensis due to low genetic diversity, lack of gene flow, and recent population contraction.
关键词[WOS]: QINGHAI-TIBETAN PLATEAU ; HUMAN MITOCHONDRIAL-DNA ; POPULATION-STRUCTURE ; STATISTICAL-METHOD ; SPECIES RICHNESS ; F-STATISTICS ; FRESH-WATER ; ICE AGES ; DISTANCE ; DIFFERENTIATION
语种: 英语
WOS记录号: WOS:000349898100015
ISSN号: 2045-7758
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/23836
Appears in Collections:水生生物多样性与资源保护研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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