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1、廣西大學(xué)碩士學(xué)位論文象草遺傳多樣性的RAPD分析姓名:藍(lán)亦鋒申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):動(dòng)物營(yíng)養(yǎng)與飼料科學(xué)指導(dǎo)教師:賴志強(qiáng)20120628象草遺傳多樣性的RAPI)分析摘要以廣西南寧地區(qū)的9種象草的幼嫩葉片為材料,研究了RAPD—PCR反應(yīng)條件;并應(yīng)用RAPD分子標(biāo)記對(duì)9份象草的遺傳多態(tài)性、親緣關(guān)系等進(jìn)行分析,結(jié)果表明:1.RAPD—PCR優(yōu)化的最終體系為:總體積為20此,反應(yīng)體系中含有總體積20皿,反應(yīng)體系中試劑添加量:10xPCRBuffer2.01xl_,、帥s(各10mM)0.4此、primer(10pM)1.2止、M92十(2
2、5mM)1.5止、TaqE(SWIJLL)0.4皿、DNA(10ng)2.O止、ddH20upto20止。2.篩選出12條RAPD引物進(jìn)行RAPD分析。12條RAPD引物共檢測(cè)到51個(gè)位點(diǎn),其中多態(tài)位點(diǎn)占100%,Nei’s基因多樣度為0.3108,Shannon信息指數(shù)為0.4781;砒姬D標(biāo)記顯示象草具有豐富的遺傳多態(tài)性。3.基于RAPD擴(kuò)增構(gòu)建相應(yīng)的Nei’s遺傳距離矩陣,以及UPGMA樹(shù)圖。4.根據(jù)電泳結(jié)果記錄清晰可重復(fù)的RAPD條帶。當(dāng)用同一引物對(duì)9種象草DNA進(jìn)行電泳時(shí),同一遷移率的條帶記為一個(gè)位點(diǎn),擴(kuò)增帶存在時(shí)記為1,
3、否則記為O,用NTSYS軟件進(jìn)行運(yùn)算并作圖。通過(guò)聚類分析得出,9種象草可明顯分為兩大類。由于這9種象草可明顯分為親緣關(guān)系較遠(yuǎn)的兩大類,進(jìn)行象草雜交育種時(shí)可以嘗試分別采用兩大類象草中的一種作為親本材料,雜交得出的后代可能會(huì)有比較優(yōu)異的生產(chǎn)性狀和表型性狀,從而為象草的雜交育種提供科學(xué)依據(jù)和理論依據(jù)。關(guān)鍵詞:象草隨機(jī)擴(kuò)增多態(tài)性DNA簡(jiǎn)單序列重復(fù)標(biāo)記條件優(yōu)化遺傳多樣性STUDYoNGENETICDIVERSITYOF尸E7V=;啦丁U^夕SSP.BYRAPDMARKERABSTRACT9Pennisetumssp.materialsfrom
4、GuangxiNanningwerestudiedforoptimizingtheRAPDreactionconditionsandprocedure.Penffisetum’SgeneticdiversityandrelationshipwerestudiedbyRAPDmarkers.Themajorresultsshowed嬲f(shuō)ollows:1.TheobtainedoptimumschemewasfoundonreactionsystemforRAPD—PCR:10xPCRBuffer2.0I-tL、dNTPs(eachlO
5、mM)O.4肛L、primer(10pM)1.2止。、M92+(25mM)1.5此、TaqE(5U/此)0.4此、DNA(10ng)2.0此、ddH20upto20}此.2.TheanalysisofRAPDmarkershowedthat12RAPDprimersamplifiedatotalof51seorablemarkers,percentageofpolymorphiclociWas100%,Nei’sgeneticdiversityandshannon’Sinformationindexwere0.3108and0.47
6、81.TheresultsofRAPDsilowedthatthegeneticdiversityofforageresourcesonpennisetumWasrich.3.ThematrixesofgeneticdistanceandUPGMAclusterwereestablishedonRAPDfingerprint.4.TheclearandreproducibleRAPDbandswererecordedaccordingtotheelectrophoresisresults.Intheamplificationprod
7、uctsbythesameprimer,bandswiththesamemobilitywererecordedtoalocus,"l’'Wasrecordedwhenthebandexisted.Otherwise,"0’'WaSrecorded.NTSYSsoftwareWasusedforcalculationandmappingaccordingtothedata.Byclusteringanalysis,9kindsofPennisetumssp.canbeclearlydividedinto2categories.Bec
8、ausethese9kindsofPennisetumssp.canbeclearlydividedintotwodistantcategories,wecantrytousetwoPennisetumssp.fromdifferen