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1、BiochemicalSystematicsandEcology37(2009)579–588ContentslistsavailableatScienceDirectBiochemicalSystematicsandEcologyjournalhomepage:www.elsevier.com/locate/biochemsysecoHighgeneticdifferentiationandvariationasrevealedbyISSRmarkerinPseudotaxuschienii(Taxaceae),anoldrareconiferendemic
2、toChinaab,*aYingjuanSu,TingWang,PuyueOuyangaStateKeyLaboratoryofBiocontrol,SchoolofLifeSciences,SunYat-senUniversity,Guangzhou510275,Guangdong,ChinabWuhanBotanicalGarden/WuhanInstituteofBotany,ChineseAcademyofSciences,Wuhan430074,Hubei,ChinaarticleinfoabstractArticlehistory:Pseudota
3、xuschienii(Taxaceae)isanendangeredconiferspeciesendemictoChina,withReceived15June2009ahistoricallydisjunctdistributionpattern.ElevenpopulationssampledthroughoutitsAccepted10October2009rangewereexaminedusinginter-simplesequencerepeats(ISSR)markers.Twentyprimersgenerated242bands,andea
4、chdetectedpolymorphicloci,with73.14%ofpolymorphiclociKeywords:overall.TheestimateforqBwas0.5306,whereasGandFvalueswere0.6146andSTSTPseudotaxuschienii0.6401,respectively.50.62%ofthetotaldiversitybasedonShannon’sindexofpheneticOldrarespeciesBdiversitywasattributedtoamongpopulations,wh
5、ichwasconsistentwiththeqesti-Populationdifferentiationmation.Comparedwithotherconifers,remarkablegeneticdifferentiationoccurredamongGeneticvariationP.chieniipopulations.AManteltestindicatedthatpairwisevaluesofqBweresignificantlyConservationstrategiesrelatedwithgeographicaldistancesbe
6、tweenpopulations(r¼0.676,P¼0.001).Intermsoftheaboveresults,conservationstrategiesandmaintenanceplansofP.chieniiwererecommended.Ó2009ElsevierLtd.Allrightsreserved.1.IntroductionLifehistoryandecologicalcharacteristicshavesignificanteffectsonthelevelsandpartitioningofgeneticdiversityinp
7、lants(HamrickandGodt,1996;Allnuttetal.,1999).Treespecieswithlonglifespans,widespreaddistributions,outcrossingbreedingsystems,andthepotentialforlong-distancegeneflowtendtobemoregeneticallydiverseanddisplaylessinterpopulationdifferentiation,whichdifferssubstantiallyfromthegeneticpatter
8、nsdetectedinherbace
