食品科学 ›› 2009, Vol. 30 ›› Issue (20): 312-315.doi: 10.7506/spkx1002-6300-200920068

• 分析检测 • 上一篇    下一篇

实时荧光PCR方法检测食品中痕量荞麦成分

史艳宇1,刘金华2,逄晓阳1,张晓惠1,任常菲1   

  1. 1.吉林省产品质量监督检验院 2.吉林出入境检验检疫局
  • 收稿日期:2008-10-20 修回日期:2009-07-30 出版日期:2009-10-15 发布日期:2010-12-29
  • 通讯作者: 史艳宇 E-mail:shiyanyu219@yahoo.com.cn

Real-time PCR Assay of Trace Buckwheat (Fagopyrum spp.) in Foods

SHI Yan-yu1,LIU Jin-hua2,PANG Xiao-yang1,ZHANG Xiao-hui1,REN Chang-fei1   

  1. 1. Jilin Product Quality Supervision Inspection, Changchun 130022, China;
    2. Jilin Entry-Exit Inspection and Quarant Bureau, Changchun 130062, China
  • Received:2008-10-20 Revised:2009-07-30 Online:2009-10-15 Published:2010-12-29
  • Contact: SHI Yan-yu E-mail:shiyanyu219@yahoo.com.cn

摘要:

目的:建立一种快速、特异、灵敏的荞麦成分检测方法。 方法:针对荞麦内转录间隔区ITS(internal transcribed spacer)和5.8S rRNA基因序列设计一对PCR引物及探针,建立实时荧光PCR检测方法;以同源性(27个荞麦属相关物种)及非同源性(食品中常见的栽培型植物)参考植物物种作特异性检测;以50mg/kg小麦DNA作为稀释液对荞麦DNA进行梯度稀释,做灵敏度检测。 结果:该方法能够有效对荞麦成分进行快速检测,具有较强的特异性,灵敏度较高(可达0.1μg/kg)并且小麦成分的存在对荞麦灵敏度检测没有影响。结论:该方法特异性强,灵敏度高,可以快速、准确检测食品中含有的痕量荞麦成分。

关键词: 荞麦过敏原, 内转录间隔区ITS, 荧光定量PCR, 检测

Abstract:

A real-time PCR method for the detection of trace buckwheat in foods was established using forward and reverse primers and probe corresponding to the internal transcribed spacer region (ITS) and the 5.8S rRNA gene. The method was buckwheat-specific and compatible with both cultivated and wild buckwheat of the Fagopyrum spp. Its sensitivity was sufficient to detect 0.1 μg/kg of buckwheat DNA spiked in wheat DNA.

Key words: buckwheat allergy, internal transcribed spacer (ITS), real-time PCR, detection

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