菊花5种病毒及类病毒多重RT-PCR检测方法的建立Establishment of A Multiplex RT-PCR System for Detection of Five Viruses/Viroids in Chrysanthemum × Morifolium
张利英,王森,陈东亮,喻锌,姜宝龙,程钰涵,李彦慧,黄丛林
摘要(Abstract):
菊花是世界最重要的园艺作物之一,兼具有茶用、药用、食用及观赏等多种经济价值。我国是栽培菊花的起源地,也是主要种植生产区。病毒病害是菊花生产过程中最主要病害,目前已知的菊花病毒及类病毒有20多种,对菊花产业危害巨大。建立快速、高效的检测方法是病害防控的必要条件。前期调查显示番茄斑萎病毒(Tomato spotted wilt orthotospovirus,TSWV)、番茄不孕病毒(Tomato aspermy virus,TAV)、菊花B病毒(Chrysanthemum virus B,CVB)、菊花矮化类病毒(Chrysanthemum stunt viroid,CSVd)和菊花褪绿斑驳类病毒(Chrysanthemum chlorotic mottle viroid,CChMVd)是北京地区菊花中主要病毒及类病毒种类。自NCBI数据库下载以上病毒/类病毒的基因序列,利用不同病毒保守区域,设计开发出特异性引物,建立了5种病毒/类病毒同时检测的多重RT-PCR体系;并对反应体系中引物对的含量配比、退火温度、模板含量等因子进行了优化。试验结果显示,TSWV、TAV、CVB、CChMVd、CSVd的引物对浓度分别为300 nmol/L、50 nmol/L、200 nmol/L、700 nmol/L、600 nmol/L,模板用量0.5 ng/μL,退火温度55.3℃时,可以同时扩增出片段大小为分别485 bp、376 bp、292 bp、220 bp、110 bp的目的条带,特异性良好,结果判读简单清晰。进一步的比较分析显示,其与单一病毒检测的RT-PCR体系的检测灵敏性相当。综上,本研究构建的多重RT-PCR体系可以高效、快速、灵敏的检测菊花中常见的5种病毒及类病毒,并且检测成本大幅降低,为病毒的快速、低成本检测提供了方法。
关键词(KeyWords): 菊花;病毒;类病毒;多重RT-PCR
基金项目(Foundation): 现代农业产业技术体系北京市创新团队项目(项目号:BAIC09-2023,题目:北京市景观休闲农业创新团队~~
作者(Author): 张利英,王森,陈东亮,喻锌,姜宝龙,程钰涵,李彦慧,黄丛林
DOI: 10.13242/j.cnki.bingduxuebao.004366
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