园艺学报2014,41(6):1257–1266http://www.ahs.ac.cnActaHorticulturaeSinicaE-mail:yuanyixuebao@126.com收稿日期:2014–01–27;修回日期:2014–03–27基金项目:公益性行业(农业)科研专项经费项目(201203021);海南省重大科技项目(ZDZX2013020-3);海南省科学事业费项目(琼财预[2013]131号);海南省重点科技计划应用研究及产业化项目(ZDXM20130031)*通信作者Authorforcorrespondence(E-mail:hefanhn@163.com)菠萝凋萎相关病毒–2实时荧光定量RT-PCR检测方法的建立胡加谊1,2,罗志文2,范鸿雁2,李向宏2,刘志昕3,何凡2,*(1海南大学环境与植物保护学院,海口570228;2海南省农业科学院热带果树研究所,农业部海口热带果树科学观测实验站,海口571100;3中国热带农业科学院热带生物技术研究所,海口571101)摘要:菠萝凋萎相关病毒(Pineapplemealybugwiltassociatedvirus-2,PMWaV-2)是引起的菠萝凋萎病(Mealybugwiltofpineapple,MWP)的重要病原。本研究中根据PMWaV-2外壳蛋白基因序列设计特异性引物和探针,建立基于TaqMan探针的实时荧光定量RT-PCR检测方法。该方法能高灵敏检测出阳性样品,对阴性样品及空白对照均无荧光反应;灵敏度比普通PCR高100倍;重复性试验表明批内和批间变异系数均在1.85%以内,表明本方法是一种操作简便、特异性强、灵敏度高、重复性较好的PMWaV-2定量检测方法。关键词:菠萝;菠萝凋萎病毒–2(PMWaV-2);TaqMan探针;实时荧光定量RT-PCR;检测中图分类号:S668.3;S432文献标志码:A文章编号:0513-353X(2014)06-1257-10DevelopmentofaReal-timeFluorescentQuantitativeRT-PCRMethodfortheDetectionofPineapplemealybugwiltassociatedvirus-2HUJia-yi1,2,LUOZhi-wen2,FANHong-yan2,LIXiang-hong2,LIUZhi-xin3,andHEFan2,*(1CollegeofEnvironmentandPlantProtection,HainanUniversity,Haikou570228,China;2InstituteofTropicalFruitTrees,HainanAcademyofAgriculturalSciences/HaikouInvestigationStationofTropicalFruitTrees,MinistryofAgriculture,Haikou571100,China;3InstituteofTropicalBioscienceandBiotechnology,ChineseAcademyofTropicalAgriculturalSciences,Haikou571101,China)Abstract:Pineapplemealybugwiltassociatedvirus-2(PMWaV-2)isanimportantpathogenthatcausesMealybugwiltofpineapple(MWP).Thisstudyestablishedareal-timequantitativeRT-PCRmethodwithTaqManprobebasedonspecificprimersofconservednucleotidesequenceofPMWaV-2coatproteingene.Theresultsshowedthatthemethodishighlysensitivetopositivesample,buthasnofluorescencesignaltohealthsampleandwatercontrol.Thesensitivityofreal-timequantitativeRT-PCRisabout100timeshigherthanregularPCR.Three-timerepeatsrevealedthatthecoefficientsofvariationbetweentheintra-andinter-assaywerebothwithin1.85%,indicatingasimple,specificity,highsensitivity,andreliablereproducibilitydetectionmethodtoPMWaV-2.Keywords:pineapple;PMWaV-2;TaqManprobe;real-timequantitativeRT-PCR;detction1258园艺学报41卷菠萝凋萎病(Mealybugwiltofpineapplewilt,MWP)是世界各菠萝主产区的重要病害之一,对经济栽培造成严重影响(Carter,1934,1942,1945)。菠萝凋萎病的发生被认为是菠萝凋萎病毒(Pineapplemealybugwiltassociatedvirus)和粉蚧共同危害的结果,全世界已报道了5种菠萝凋萎病毒,即PMWaV-1、PMWaV-2、PMWaV-3、PMWaV-4和PMWaV-5(Gambleyetal.,2008)和两种传毒粉蚧,即菠萝洁白粉蚧(Dysmicoccusbrevipes)和新菠萝灰粉蚧(D.neobrevipes)。目前,在中国已见报道的菠萝凋萎病毒有PMWaV-1、PMWaV-2和PMWaV-3(吴丽亭等,2009,2010;李运合等,2010)。夏威夷大学的学者经研究首次提出PMWaV-2为菠萝凋萎病的重要病原之一(Setheretal.,1998,Sether&Hu,2002)。国内有学者报道,PMWaV-2和菠萝粉蚧共同作用是引起菠萝凋萎病的最重要原因,其发病率可高达60%,可造成25%~30%的经济...