三疣梭子蟹微衛(wèi)星文庫(kù)的構(gòu)建及多態(tài)性位點(diǎn)篩選

三疣梭子蟹微衛(wèi)星文庫(kù)的構(gòu)建及多態(tài)性位點(diǎn)篩選

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時(shí)間:2019-03-12

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1、●◆上海海洋大學(xué)碩士學(xué)位論文MicrosatellitelibraryConstructionandpolymorphiclociscreeningfortheswimmingcrab,PortunustrituberculatusABSTRACTmswimmingcrab(Portunustrituberculatus)isanimportantfisheryresource,widelydistributedincoastalareasofChina.11圮swimmingcrabwasregarededasoneofthemarineaquaculturespeciesfrom198

2、1.Ithasbecomeoneofthemainaquaculturespeciesduetoitsconsiderableeconomicvalue,highediblenutritionalvalueandfastgrowingspeed.Becauseofvariousreasons,theresourcesofPtrituberculatusdroppedsharply,defenseabilitydeclinedandnaturalgermplasmresourcesdegradedseriouslyinrecentyears.Inordertorestoreandimprov

3、ethequalityoftheparentcrabandcrabseed,keepthehealthydevelopmentofaquaculture,avoiddecrementofwildgermplasmresources,andrealizesustainableutilizationofthenaturalresources,researchonthegeneticgermplasmresourcesofP.trituberculatusisneededurgently.Therefore,developingasetofeffectiveandreasonablemolecu

4、largeneticmarkersisnecessaryforgeneticgermplasmresourcesconservationresearchforthisspecies.MicrosatelliteDNAlibraryoftheswimmingcrabWasestablishedusingthemagneticbeadhybridizationenrichmentmethods.T0talgenomicDNAWasextractedanddigested、析tllrestrictionenzymeSau3AI.Fragmentsinrangeof200--1000bpwerea

5、garose-gelpurifiedandligated、析tllspecialadaptor,andthecombinationsWashybridized、Ⅳitllbiotin—labelledmicrosatelliteprobe(CAh2,(GA)i2,(TGC)s.Byusingthehighbindingaffinityofbiotintostreptavidin—coatedmagneticbeads,single-strandedDNAcontainingtheselectedmicrosatellitesequenceswerecaptured.ThetargetedD

6、NAWasused鷦thetemplateforPCRamplificationusingtheadapter嬲primers;andtheproductswerethencloneddirectly,screenedbybacteriumliquidPCRmethodsubsequently.Ofthe60positiveclones,42microsatellitelociwereacquired,whichwerefurthercategorizedintoperfect(73.8%),imperfect(21.4%),andcompound(4.8%)types.Amongthem

7、icrosatelliterepeats,10,--30repeatsweremostabundant.III●上海海洋大學(xué)碩士學(xué)位論文ByusingPremierPrimer5.0,wedesigned31pairsofmicrosatelliteprimers,amongwhich16pairscanamplifyexpectedproduct.These16pairsofprimerswerefurtherused

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