抗黄瓜花叶病毒RNAi载体的构建及烟草的转化(2)

发布时间:2021-06-05

70

scriptionandsynthesisoffirststrand.Andthenthefirststrand

,theamplificationwascarriedoutbythewasusedasatemplate

useoftheCMV2SP1/CMV2ASP2,CMV2SP3/CMV2ASP4ofthedesignprimersCMVRNA2,afterthesequencingoftheamplifiedsequence,theDNAMAN(Version5.2.2,Lynnon

)sequenceanalysissoftwarewasusedforsequenceBiosoft

[9]

analysisandevolutiontreeconstruction.PCRamplificationofRNAiinterferencefragments ThesequencedRNA2genomesequencewasanalyzedandtheconservedregionsindentifiedtodesignandsynthesizeprim,andthegenefragmentpreservedontheTvectorwasersusedasatemplate,thetwopairsofprimersCR2Kp/CR2SBandCR2Bg/CR2SBwereusedtoamplifytheinterferenceAgriculturalScience&TechnologyVol.11,No.5,2010

acidhomologywasof71.3%-98.8%and74.0%-98.5%

(Table3),inwhichtheNS04isolatehadhighhomologywithPhylineswhichwasfromZhejiangofChina,theGenbanknumberwasDQ412731(Fig.2),thenucleotideandamin

fragmentPCR_CR2_BKandPCR_CR2_SB.ConstructionofpBi35SCR2expressionvector AftertheamplifiedPCR_CR2_BKwasrecoveredwithBamHⅠandKpnⅠd

igestion,thecorrespondingdigestedpiRDG12siteswereinserted

,andthenthepiRD_CR2.Sfirstintermediatevectorwasobtained(Fig.1A).TheamplifiedPCR_CR2_SBwasrecoveredwithBglⅡandSacⅠd

igestion,andthecorrespondingdigestedpiRD_CR2.Ssiteswereinserted

,andthenthepiRD_CR2secondintermediatevectorwasgained(Fig.1B).AfterthepiRD_CR2vectorwasdigestedwithXbaⅠandEcoRⅠ,thesmallfragmentwasinsertedwiththecorrespondingsitesofdigestedpBi35SG12,andfinallythepBi35SCR2

expressionvectorwasobtained(

Fig.1C),thedesignofvectorwascompletedwithVectorNTIassist

Fig.1 ConstructionofpiRDCR2.S(A),piRDCR2(B)and

pBi35SCR2

(C)expressionvectorGenetictransformationtotobacco Theconstructed

pBi35SCR2expressionvectorwastransformedintoAgrobacteriumtumefaciensGV3101,theNicotianatobacco(Nt)leaveswerecutinto1cmofleafdisc,whichwerethenmixedwithAgrobacteriuminfectionliquidfor5-10minofsoaking,the

excessbacterialiquidwasremovedanddried,andthentheywereplacedonthecoculturemedium(

MS+0.5mg/Lof6BA),aftercultivatedindarkfor1-3d,theyweretrans

ferredtothedifferentiationmedium(

MS+0.5mg/Lof6BA+50.0mg/Lof

Kan+300.0mg/LofCar)fortheinductionofregenerationbud.Whentheregeneratedshootlengthwasabout1.5-2.0cm,theregenerationshootwascutoffand

transferredtorootingmedium(

MS+0.1mg/LofIAA+50.0mg/LofKan+300.0mg/LofCar)fortheinductionofroots.

ResultsandAnalysis

CloningandsequenceanalysisofCMVRNA2genome

PrimersCMV2SP1/CMV2ASP2,CMV2SP3/CMV2ASP4

wereusedtoamplifythefragmentsof1553and1378bp

,afterthealignmentsandsplicing,partsofCMVRNA2genomicfragmentwith2864bpwereobtained,andthesepartscontainedthenucleotidesequencewhichcouldencodeCMV2a

replicaseproteinandCMV2bprotein

,bytheuseofDNAMANsoftware,thecomparisonofCMV2afragmentsofNS04isolateandotherisolates(GenbanknumberandoriginwereshowninTable2)suggestedthattheirnucleotideandamino

Fig.2 PhylogenetictreeofthenucleotidesequenceofCMV

2aisolates

acidhomologywere98.0%and96.5%respectively.

Table2 TheGenbanknumberofdifferentCMVisolationsGenbanknumberOrigin

IsolationsAB368500JapanCMVPfAB079890JapanCMV36a1AB179765JapanCMVD8AB368497JapanCMV42CMDQ399549ZhejiangProvinceofChinaCMVBXDQ412731ZhejiangProvinceofChinaCMVPhyEF213024ZhejiangProvinceofChinaCMVCTLAM183115SpainCMVPl1AB183118SpainCMVRi8EF202596ZhejiangProvinceofChinaCMVTshD10209JapanCMVOD86330BeijingofChinaCMVSDEU665001BeijingofChinaUnknownS72187UnknownCMVKEU723570ZhejiangProvinceofChinaCMVPHzFJ268745ZhejiangProvinceofChinaCMVCah1AJ276480

Korea

CMVMf

PCRamplificationofinterferingfragments

ThesequencewhichwasconnectedtotheTcloningvectorandhadcorrectalignmentwiththeNCBIdatabasedatawasusedasthetemplate.Bytheuseofthedesignedprimers

CR2Kp/CR2SBandCR2Bg/CR2SB

,thePCR_CR2_BKfragmentwith693bpandPCR_CR2_SBfragmentwith741bpwereamplified(Fig.3,4).ThetwoendsofthePCR_CR2

BKwereintroducedtworestrictionsitesofBamHⅠandKpnⅠ

,whileBglⅡandSacⅠrestrictionsiteswereintroducedtothetwoendsofPCR_CR2_SBtofacilitatetheconstructionoffollowupvector.ConstructionandidentificationofpBi35SCR2expressionvector

AftertheconnectionofPCRCR2BKandpiRDG12,a

4763bpofpiRDCR2.Sintermediatevectorwasobtained

,therewasaClaIrestrictionsiteintheconnectedPCRCR2BKfrag

ment,anda4763bpbandwasgainedbysingleenzymedigestion,indicatingthatPCRCR2BKhadconnectedwiththevector(Fig.5).AftertheconnectionofPCRCR2SBfragmentsandintermediatevectorpiRDCR2.S,piRDCR2wasobtained,finally

抗黄瓜花叶病毒RNAi载体的构建及烟草的转化(2).doc 将本文的Word文档下载到电脑

精彩图片

热门精选

大家正在看

× 游客快捷下载通道(下载后可以自由复制和排版)

限时特价:7 元/份 原价:20元

支付方式:

开通VIP包月会员 特价:29元/月

注:下载文档有可能“只有目录或者内容不全”等情况,请下载之前注意辨别,如果您已付费且无法下载或内容有问题,请联系我们协助你处理。
微信:fanwen365 QQ:370150219