华北农学报 ›› 2019, Vol. 34 ›› Issue (S1): 296-301. doi: 10.7668/hbnxb.20190656

• 资源环境·植物保护 • 上一篇    下一篇

镰孢菌属实时荧光定量PCR检测方法的建立及应用

陈利达1, 袁军海2, 李磊1, 石延霞1, 柴阿丽1, 谢学文1, 李宝聚1   

  1. 1. 中国农业科学院 蔬菜花卉研究所, 北京 100081;
    2. 河北北方学院, 河北 张家口 075061
  • 收稿日期:2019-08-23 出版日期:2019-12-28
  • 通讯作者: 李宝聚(1967-),男,黑龙江饶河人,研究员,博士,主要从事蔬菜病害诊断与综合防控研究;谢学文(1982-),男,山东招远人,副研究员,博士,主要从事蔬菜病害诊断与综合防控研究。
  • 作者简介:陈利达(1993-),男,河北邯郸人,在读博士,主要从事蔬菜病害诊断研究。
  • 基金资助:
    国家重点研发计划项目(2017YFD0200603;2016YFD0201000);农业部园艺作物遗传改良重点开放实验室

Development and Application of Quantitative PCR for Detection of Fusarium

CHEN Lida1, YUAN Junhai2, LI Lei1, SHI Yanxia1, CHAI Ali1, XIE Xuewen1, LI Baoju1   

  1. 1. The Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. Hebei North University, Zhangjiakou 075061, China
  • Received:2019-08-23 Published:2019-12-28

摘要: 为了建立一种快速检测镰孢菌属的方法。根据Fusarium翻译延伸因子(TEF-1α)基因序列,设计并筛选其特异性引物F8-1/F8-2,能从靶标基因组DNA中特异性扩增出大小为187 bp的目的片段,建立Fusarium荧光定量PCR (RT-PCR)检测体系的灵敏度比常规PCR高104倍,且特异性良好。利用该反应体系检测不同湿度环境下病残体和土壤病残体DNA含量的动态变化。结果表明:病残体及土壤病残体DNA初始拷贝数分别为6.90×1011 ,1.06×1012拷贝数/g,经过温度27℃、80%湿度下处理30 d病残体DNA含量下降至5.55×108和0拷贝数/g,而在温度27℃、20%湿度下含量分别为8.04×109,1.30×109拷贝数/g。因此,建立的Fusarium实时荧光定量PCR检测体系具有特异性强、灵敏度高的特点,可以快速准确地定量检测病残体DNA的含量,为瓜类根腐病的早期预防和流行监测提供了有效的技术手段。

关键词: 镰孢菌, 实时荧光定量PCR, 湿度, 病残体

Abstract: To establish a method for rapid detection of Fusarium. Real-time PCR assay for quantitative detection of Fusarium in cucumber was developed and a pair of specific primers were designed based on the genome sequence of cucumber Fusarium and a target fragment of 187 bp was specifically amplified from the genomic DNA of Fusarium. The detection sensitivity of RT-PCR established in this study was 104 times higher than that of conventional PCR. RT-PCR method was used to investigate the variation of crop residues DNA and residues DNA of soil in different humidity. The results showed that the initial copy numbers of DNA of crop residues and crop residues of soil was 6.90×1011,1.06×1012 copies/g,respectively. After treatment at temperature 27 ℃ and 80% humidity for 30 days, the DNA content of the crop residues decreased to 5.55×108 and 0 copies/g,respectively. The content was 27 ℃ and 20% humidity was 8.04×109 and 1.30×109 copies/g,respectively. Therefore, these studies showed that RT-PCR assay is a highly rapid and reliable method to quantify Fusarium in cucumber crop residues. Application of the assay may potentially improve pathogen identification and disease management.

Key words: Fusarium, Real-time PCR, Humidity, Crop residues

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引用本文

陈利达, 袁军海, 李磊, 石延霞, 柴阿丽, 谢学文, 李宝聚. 镰孢菌属实时荧光定量PCR检测方法的建立及应用[J]. 华北农学报, 2019, 34(S1): 296-301. doi: 10.7668/hbnxb.20190656.

CHEN Lida, YUAN Junhai, LI Lei, SHI Yanxia, CHAI Ali, XIE Xuewen, LI Baoju. Development and Application of Quantitative PCR for Detection of Fusarium[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 296-301. doi: 10.7668/hbnxb.20190656.

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