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1、应用生态学报摇2011年6月摇第22卷摇第6期摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇摇ChineseJournalofAppliedEcology,Jun.2011,22(6):1606-1614*太湖日本沼虾野生群体遗传结构的微卫星分析111211,3**冯建彬摇吴春林摇马克异摇丁怀宇摇华雪铭摇李家乐12(上海海洋大学省部共建水产种质资源发掘与利用教育部重点实验室,上海201306;江苏省环洪泽湖生态农业生物技术重3点实验室,江苏淮安223300;上海高校水产养殖学E鄄研究院,上海2
2、01306)摘摇要摇利用8个高度多态性的微卫星位点分析了太湖日本沼虾野生群体的遗传结构.结果表明:在15个群体中至少有3个位点经Bonferroni校正后显示杂合不足,显著偏离了Hardy鄄Weinberg平衡;15个群体中观测杂合度均大于0郾683,显示出较高的遗传多样性水平,但其波动明显,如太湖东、南部的渡口和陆巷等群体的遗传多样性高于西、北部的华庄和洋渚等群体;突变鄄漂移平衡分析结果显示,15个群体中部分位点杂合显著过剩,偏离了突变鄄漂移平衡,且近期曾经历过瓶颈效应,群体数量曾经下降;群体间AMOV
3、A分析表明,太湖日本沼虾群体间遗传分化程度较低(F=0郾011),98郾9%的遗传变异来自群体内,1郾1%来自群体间,并ST没有形成显著的遗传结构,在种质资源保护和管理上可视作一个单元;华庄与吴塘门群体间D遗传距离达到0郾206,已接近种间分类界限,故太湖日本沼虾种质资源可持续利用工作仍A须深入的研究.关键词摇日本沼虾摇太湖摇微卫星摇遗传结构文章编号摇1001-9332(2011)06-1606-09摇中图分类号摇Q346.5;S917.4摇文献标识码摇AGeneticstructureofwildMac
4、robrachiumnipponensepopulationsinTaihuLakebasedonmi鄄1112crosatelliteanalysis.FENGJian鄄bin,WUChun鄄lin,MAKe鄄yi,DINGHuai鄄yu,HUAXue鄄11,31ming,LIJia鄄le(MinistryofEducationKeyLaboratoryofExplorationandUtilizationofAquatic2GeneticResources,ShanghaiOceanUniversit
5、y,Shanghai201306,China;JiangsuProvinceKeyLaboratoryforEco鄄AgriculturalBiotechnologyaroundHongzeLake,Huai爷an223300,Jiangsu,3China;AquacultureDivision,E鄄InstituteofShanghaiUniversities,Shanghai201306,China).鄄Chin.J.Appl.Ecol.,2011,22(6):1606-1614.Abstract:B
6、yusingeighthighlypolymorphicmicrosatelliteDNAloci,thispaperanalyzedthege鄄neticstructureofwildMacrobrachiumnipponensepopulationsinTaihuLake.Forthe15M.nippon鄄ensepopulationsintheLake,therewereatleastthreeofthelocipresentingheterozygositydeficien鄄cyandobviou
7、sdeviationfromHardy鄄WeinbergequilibriumafterBonferronicorrection.Theob鄄servedheterozygosityvaluesofthe15populationswereallabove0郾683,displayingahighgeneticdiversity,butthediversityvariedobviouslywithsite.Forexample,thegeneticdiversityoftheeast鄄ernandsouth
8、ernpopulationsatDukouandLuxiangwashigherthanthatofthewesternandnorthernpopulationsatHuazhuangandYangzhu.Forthe15populations,partsofthelocishowedheterozy鄄goteexcessanddeparturefrommutation鄄driftequilibrium,suggesting
