13924.石蒜屬(lycoris)種間系統發(fā)育關系及石蒜(l.radiata)的親緣地理學研究

1、分類號Q941UDC581.9學校代碼10129學號2010202008石蒜屬石蒜屬（Lycis）種間種間系統發(fā)育系統發(fā)育關系關系及石蒜石蒜（L.radiata）的）的親緣親緣地理學研究地理學研究StudyonthethephylogeicrelationshipofLycisphylogeographyofL.radiata申請人：厐磊學科門類：理學學科專業(yè)：植物學研究方向：植物發(fā)育生理指導教師：史樹德論文提交日期：二〇一三年六月St

2、udyonthethephylogeicrelationshipofLycisphylogeographyofL.radiataAbstractLycisgenusisbulbsperennialherbofamaryllidaceae(Amaryllidaceae)mainlydistributedintheprovincessouthoftheYangtzeRiverinChinaSouthKeaJapaninEastAsia.Ly

3、cisspecieseasilyhybridizewitheachotherhybridsofmphologicalfeaturesvaryfrequentlyinnatureamongcultivatedgenotypes.ThesouthareaoftheYangtzeRiverinChinamaybetheiginofthespeciescenterdifferentiation.Hybridizationpolyploidyis

4、consideredtobethegenusspeciesfmedway.theinterspecificphylogeicrelationshipsofLycisblurduetofrequenthybridizationthenumberofspecieswithinthegenusthetaxonomicstatusofsomespeciesthereisadisputesotheaimofthisstudyfocusonthef

5、ollows:(1)AnalysisofchloplastDNAfragmentsoftrnstrnfMsequencesofLycisinthephylogeicrelationshipsamongspeciesofLycisbasedonthatasamonophyleticgrouptreecloserelativerelationshipgroupsclusteredintoonebranchhybridstheirpossib

6、leparentstogetheronabranch..(2)RelationshipbetweenspecieschromosomaltaxonomyofthegenustrnstrnfMsequencerevealstheLycisresultsgenerallyconsistentmainlyinhavingacrocentricchromosomehasacentralptionacrocentricchromosomeofea

7、chintoathistaxonomymphologychromosomeresultsthedifferenceisthatwithacentralendaproximalendthepairofthreetypesofchromosomewhichisdispersedintheothertwosupptofpolyploidnoneuploidkaryotypeisofhybridiginhypothesis.（3）Reveals

8、aclearLycisinterspecificphylogeicrelationshipsfoundsomesubspecieshybridsneedtoreconsidertheclassificationstatusbutalsoevidenceofLycishybridizationpolyploidyspeciationmode.（4）BasedonchloplastDNA(cpDNA)fragmentsofrpl32trnL

9、trnLtrnFSSRmolecularmarkerofwidelydistributedspeciesofLycisradiata(L.radiata)phylogeographicstudiesshowthat:EastChina(ZhejiangAnhuiJiangsu)isthecenterofgeicdiversityofChineseLycisradiatageicpopulationhasahighlevelofgeicd