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额尔齐斯河与黑龙江流域哲罗鲑群体遗传差异比较
引用本文:汪鄂洲,廖小林,杨钟,胡兴坤,李伟涛,陈锋,朱滨,王红莹,黄道明.额尔齐斯河与黑龙江流域哲罗鲑群体遗传差异比较[J].水生态学杂志,2019,40(4):75-82.
作者姓名:汪鄂洲  廖小林  杨钟  胡兴坤  李伟涛  陈锋  朱滨  王红莹  黄道明
作者单位:中南民族大学生命科学学院生物技术国家民委重点实验室/武陵山区特色资源植物种质保护与利用湖北省重点实验室;水利部中国科学院水工程生态研究所水利部水工程生态效应与生态修复重点实验室
基金项目:额尔齐斯河流域哲罗鲑、细鳞鲑种群资源及其遗传多样性研究专题项目(KKYG03)
摘    要:由于拦河筑坝、水体污染以及过度捕捞等原因,哲罗鲑(Hucho taimen)野生资源急剧衰退,已被列入中国脊椎动物红色名录,急需开展哲罗鲑野生群体的恢复与保护工作,人工增殖放流已成为最重要的保护方式之一。为了开展科学有效的哲罗鲑人工增殖放流工作,分析其不同来源群体的遗传多样性与遗传差异非常必要。通过测定来自我国额尔齐斯河(IR)、黑龙江(AR)以及人工繁殖(AP,亲本来源于黑龙江流域)的3个哲罗鲑群体线粒体DNA部分序列(COI和D-loop),并从GenBank下载来自俄罗斯鄂毕河(额尔齐斯河下游河流)、黑龙江流域的部分D-loop序列,比较额尔齐斯河与黑龙江流域哲罗鲑的遗传差异。结果表明,在测定的43尾个体中,线粒体DNA测序长度为2 626bp,共检测出37个多态位点,定义了18个单倍型,单倍型多样性为0.520~0.952,核苷酸多样性为0.00032~0.00167,其中IR群体的单倍型多样性最高,AR群体核苷酸多样性最高,而AP群体单倍型与核苷酸多样性均最低。分子方差分析(AMOVA)显示,77.19%的遗传变异来源于群体间,总遗传分化指数(Fst)为0.7719(P0.01),表明两个流域的哲罗鲑群体间存在显著的遗传分化。无论是仅使用本研究测定的样品,还是加入从GenBank下载的俄罗斯哲罗鲑样品,聚类分析结果均表明存在两个明显的单倍型谱系分支,额尔齐斯河流域哲罗鲑为单独一支,黑龙江流域哲罗鲑聚为另一支。建议加强人工繁殖哲罗鲑的遗传管理和不同水域哲罗鲑增殖放流的遗传学论证,有效维持自然水体哲罗鲑的遗传多样性水平。

关 键 词:哲罗鲑  线粒体DNA  额尔齐斯河流域  黑龙江流域  遗传差异
收稿时间:2019/4/30 0:00:00
修稿时间:2019/7/18 0:00:00

Analysis of Genetic Differentiation for Hucho taimen Populations in the Irtysh and Amur River Basins Based on Mitochondrial DNA Sequencing
WANG E-zhou,LIAO Xiao-lin,YANG Zhong,HU Xing-kun,LI Wei-tao,CHENG Feng,ZHU Bin,WANG Hong-ying and HUANG Dao-ming.Analysis of Genetic Differentiation for Hucho taimen Populations in the Irtysh and Amur River Basins Based on Mitochondrial DNA Sequencing[J].Journal of Hydroecology,2019,40(4):75-82.
Authors:WANG E-zhou  LIAO Xiao-lin  YANG Zhong  HU Xing-kun  LI Wei-tao  CHENG Feng  ZHU Bin  WANG Hong-ying and HUANG Dao-ming
Institution:South-Central University for Nationalities, Wuhan 430074, P. R. China; Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China,Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China,Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China,Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China,Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China,Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China,Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China,South-Central University for Nationalities, Wuhan 430074, P. R. China; and Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P.R. China
Abstract:
Keywords:Hucho taimen  mitochondrial DNA  Irtysh River basin  Amur River basin  genetic differentiation
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