西花蓟马的SCAR分子检测技术孟祥钦1,闵亮1,3,万方浩1,2,周忠实1,2,王文凯3,张桂芬1,2,(1.中国农业科学院植物保护研究所,植物病虫害生物学国家重点实验室,北京100193;2.农业部外来入侵生物预防与控制研究中心,北京100081;3.长江大学农学院,湖北荆州434025)摘要:西花蓟马Frankliniellaoccidentalis(Pergande)是一种世界性入侵害虫,寄主范围广,危害严重,2003年首次在我国发生危害,并有进一步扩散蔓延的趋势。针对蓟马类害虫虫体微小、形态相似,难以准确快速区分的问题,采用特征序列扩增区域(SCAR)标记技术,以西花蓟马及与之同域发生的其他种类蓟马为对象,筛选出1对西花蓟马特异性引物(FOMF/FOMR),其扩增片段大小为320bp。种特异性检测结果显示,该对引物只对西花蓟马的基因组DNA具有扩增能力,对同域发生的花蓟马F.intonsa(Trybom)、禾花蓟马F.tenuicornis(Uzel)、烟蓟马ThripstabaciL.等41种蓟马不具有扩增效果。该对引物不仅对不同虫态的西花蓟马具有扩增能力,而且在西花蓟马发生地的寄主植物组织内亦检测到了其卵的存在。同时,该检测技术灵敏度高,对成虫的最低检出阈值为1/160头。本检测技术在口岸检疫以及花卉、蔬菜和种苗调运中的害虫检测和监测中具有重要意义。关键词:西花蓟马;RAPD-PCR;SCAR;快速检测;特异扩增;检出阈值:Q966文献标识码:A:0454-6296(2010)03-0000-00SCARmarkerforrapididentificationofthewesternflowerthrips,Frankliniellaoccidentalis(Pergande)(Thysanoptera:Thripidae)MENGXiang-Qin1,MINLiang1,3,WANFang-Hao1,2,ZHOUZhong-Shi1,2,WANGWen-Kai3,ZHANGGui-Fen1,2,*(1.StateKeyLaboratoryforBiologyofPlantDiseasesandInsectPests,InstituteofPlantProtection,ChineseAcademyofAgriculturalSciences,Bei激ng100193,China;2.CenterforManagementofInvasiveAlienSpecies,MinistryofAgriculture,Bei激ng100081,China;3.AgricultureCollege,YangtzeUniversity,激ngzhou,Hubei434025,China)Abstract:Thewesternflowerthirps,Frankliniellaoccidentalis(Pergande),isaworldwidepest,causingseriousdamagetoawiderangeofhostplants.ItwasfirstreportedinChinain2003,withatrendoffurtherspreading.Mostofthripsspeciesaresmallinsizeandsimilarinmorphology,whichmakesithardtobedistinguishedquickly.Inthepresentresearch,apairofSCAR(sequencecharacterizedamplifiedregions)primers(FOMF/FOMR)whicharespecifictowesternflowerthripswasdevelopedbyusingotherninefamiliarthripsspeciesasthecontrol.ThefragmentamplifiedbytheprimersFOMF/FOMRwas320bpinlength.SpecificitytestsperformedwiththispairofprimersshowedthatallF.occidentalisspecimensweredetectedpositivelyandnocrossreactionswithother41thripsspecies,includingF.intonsa(Trybom),F.tenuicornis(Uzel)andThripstabaciL.,weredetected.Themethodwastestedonasinglemaleandfemaleadult,asinglepre-pupaandpupa,asinglefirst1st-andorsecond2nd-stageinstarlarva,eandevenasingleegg,andprovedtobeapplicableforthesestagesofF.occidentalis.Moreover,the320bpgenomicDNAfragmentwasclearlyidentifiedinthehostplanttissuescollectedinF.occidentalisinfestedareas.Whenthedilutionwas1/160ofawholefemaleadultofF.occidentalis,the320bpDNAfragmentcouldbeidentifiedforallreplicates.Ourpresentresultsindicatethatthetechniqueisusefulinquarantineatportsandinpestdetectionandmonitoringduringtransportationofflowers,vegetablesandseedlings.Keywords:Frankliniellaoccidentalis;RAPD-基金项目:国家“973”计划项目(2009CB119200);国家科技支撑计划项目(2006BAD08A14);公益性行业(农业)科研专项(200803005);国家自然科学基金项目(30971967);中央财政国家重点实验室自主研究课题专项经费(SKL2007SR04)作者简介:孟祥钦,男,1983年12月生,河南濮阳人,硕士研究生,研究方向为入侵生物学与分子生态学,E-mail:mengxiangqin2003...