摘要
为建立一种检测苹果茎痘病毒(Apple stem pitting virus,ASPV)的Taq Man探针实时荧光定量RT-PCR方法,根据ASPV外壳蛋白基因(coat protein,cp)保守序列设计了特异性引物和Taq Man探针,以体外转录的RNA为标准品构建标准曲线,并对该方法的特异性、灵敏性、重复性进行检验。建立的标准曲线决定系数达0.996,扩增效率为99%;该方法特异性好,与苹果茎沟病毒(ASGV)、苹果褪绿叶斑病毒(ACLSV)、苹果锈果类病毒(ASSVd)均无交叉反应;其最低检测限为1.31×102 copies·μL-1,灵敏度比常规RT-PCR高100倍;批内和批间变异系数均小于1.85%。该方法具有特异性强、灵敏度高、重复性好等优点,适用于田间样品中ASPV的快速定量检测。
This study established a Taq Man real-time RT-PCR method for detecting Apple stem pitting virus（ASPV）. A pair of primers and a Taq Man probe were designed based on the conserved nucleotide sequence of ASPV coat protein gene（cp）. The RNA standard of ASPV was prepared with transcription in vitro and the standard curve was plotted. The specificity,sensitivity and reproducibility of this method were evaluated. The results showed that the coefficient of determination（R^2）was 0.996 and the amplification efficiency（E）was 99%. There was no crossing reaction with Apple stem grooving virus（ASGV）,Apple chlorotic leaf spot virus（ACLSV）and Apple scar skin viroid（ASSVd）,indicating a strong specificity. The detection limit of this method was 1.31 × 10^2 copies · μL^-1 and the sensitivity was 100 times higher than the conventional RT-PCR. The coefficients of variation between the intra- and inter-assay were both within 1.85%. This method could be used to detect ASPV rapidly and quantitatively in field samples with strong specificity,high sensitivity and reliable reproducibility.
出处
《园艺学报》
CAS
CSCD
北大核心
2015年第7期1400-1408,共9页
Acta Horticulturae Sinica
基金
国家现代农业产业技术体系建设专项资金项目(CARS-28)
