抗黄瓜花叶病毒RNAi载体的构建及烟草的转化(2)

时间:2025-03-12

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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), …… 此处隐藏:2330字,全部文档内容请下载后查看。喜欢就下载吧 ……

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