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1、中國(guó)農(nóng)業(yè)科學(xué)院碩士學(xué)位論文我國(guó)陸地棉基礎(chǔ)種質(zhì)及其衍生品種的遺傳多樣性姓名：陳光申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：生物化學(xué)與分子生物學(xué)指導(dǎo)教師：杜雄明20050601AbstractThegeneticdiversityofthebasicgermplasmofUplandcotron，andtheconsanguinityandgeneticstructureofsomeimportantderivativevarietiesof4baseger

2、mplasminChinawereanalyzedbasedontheiragronomicperformanceandfiberquality，SSRmarkersandthecoefficientsofparentagepvalue)Themainresultsweresummedupasfollows：1、Themainagronomiccharactersofbasicgermplasmshowedsignificantorve

3、rysignificantdifferences，thegeneticdiversity(H’)WasO88，coveredmorethan95％cultivars，Thissuggestedthatthebasegermplasmselectedpossessedagenemlrepresentative2Thefiberlength，unityandfiberfmessofthesecondandthirdperiodofbasic

4、germplasmimprovedmuchandtheirlintpercentagealsoincreased，meanwhilewithearlymaturityandhighresistancetothediseaseanddrought，ComparedwiththoseoftheprimarybasicgermplasmTheaveragegeneticdiversityindexofSSRmarkerofthefirstse

5、condandthirdperiodbasicUplandgermplasmwere0587，0630，O630，respectivelyThisimpliedthatthedifferenceamongthemodembasiclinesWasgraduallydecreasedonthegenomelevelandthisflarthershowedthatthediversityofbreedingbackgroundisbeco

6、mingweak3ThephenotypetraitsofbasicgermplasmfromdifferentcoRongrowingareawerediversity：thegeneralcharacterofthebasicgermplasminHuangherivervalleyareawasbetterthanthatofotherareasTheyieldofthebasicgermplasminChangjiangrive

7、rvalleyareawashigherandtheearlymaturityofthatinthenorthareaWasbetrerThosefromthecultivarsintroducedfromAmericashowedthehi【911resistancetoVerticilliumwiltThediversityofbasicgermplasmbetweenChangjiangandHuangheriverareacha

8、ngedobviouslyonthegenomelevel4Thefiberquality’SvariancecoefficientofthebasicgermplasmofthedomesticvarietiesWaslowerthanthatofexotic’S，andtheSSRsimilarindexofdomesticvariety(O624)Washigherthanexotic’SThissuggestedthegenet

9、icdiversityindomesticcultivarsWashardtoexceedthatoftheexotic5Among4basicgermplasmderivatelines，ThedefivatevarietiesfromUgandaexhibitedexcellentgeneralcharacters；ThederivatelinesfromDPLl4showedquitedifferentontheyieldchar

10、acters，ThosefromStoneville2BpossessedstronggrowingtrendDPLl5developedmanyderivatevarietieswithobvio璐distinctcharacters6Thesimilarityofderivatevarietiesfromdifferentgrowingareaswascoherencewiththatofbasicgermplasmfromcorr

11、espondinggrowingareasIthebasicgermplasmfromdifferentareascanrepresentrelatedcottongrowingareasThediversityofHuanghefiverplantationwaslowerthanthatofChan由iangriverTheexoticvarietyhavemorediversitythanthatofdomestic’S7Thed

12、omesticvarietyCanseperatedinto4basicgroups：DPLtype(includingUganda)、Stonevilletype(includingFoster、Trice)、lowergossypolcotrontype(includingn：1543series)、andDelfos531derivationtypeMostoflaterveritiesrelatedwiththesefourba

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