食品科学 ›› 2010, Vol. 31 ›› Issue (24): 308-310.doi: 10.7506/spkx1002-6630-201024066

• 分析检测 • 上一篇    下一篇

PCR 检测牛乳中大肠杆菌基因组DNA 的提取方法

宋宏新1,邹联柱1,马东2,薛海燕3   

  1. 1. 陕西科技大学
    2. 华北煤炭医学院
    3. 陕西科技大学生命科学与工程学院
  • 收稿日期:2010-07-26 修回日期:2010-11-15 出版日期:2010-12-25 发布日期:2010-12-29
  • 通讯作者: 宋宏新 E-mail:hongxinsong@163.com
  • 基金资助:

    陕西省科学技术厅农业攻关项目(2009K02-09);陕西省教育厅产业化培育项目(09JC19)

Extraction Methods of PCR-detectable Escherichia coli Genomic DNA in Milk

SONG Hong-xin1,ZOU Lian-zhu1,MA Dong2,XUE Hai-yan1   

  1. (1. College of Life Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China;
    2. North China Coal Medical University, Tangshan 063000, China)
  • Received:2010-07-26 Revised:2010-11-15 Online:2010-12-25 Published:2010-12-29
  • Contact: SONG Hong-xin E-mail:hongxinsong@163.com

摘要:

为获得一种适于牛乳样品大肠杆菌PCR 检测的基因组DNA 提取方法,对饱和酚法、CTAB 法、试剂盒法及溶剂裂解法等4 种提取方法加以比较,通过考察DNA 的纯度、定量分析以及PCR 分析,确定一套有效、快速、适合牛乳中提取大肠杆菌的基因组DNA 方法——溶剂热裂解法。结果显示该方法提取的DNA 模板,适于PCR扩增大肠杆菌DNA,可以用于牛乳中的大肠杆菌检测。

关键词: 乳品, 大肠杆菌, 基因组总DNA, 聚合酶链式反应

Abstract:

In order to obtain an appropriate sample for PCR detection, four extraction methods including saturated phenol method, CTAB method, kit method and solvent pyrolysis method for E. coli genomic DNA in milk samples were compared. Through evaluating the purity, quantitative analysis and PCR analysis of genomic DNA extracted by four methods, an effective and fast solvent-thermal pyrolysis method was suitable for the extraction of E. coli genomic DNA in milk. The genomic DNA extracted by this method used as the template is suitable for PCR amplification of E. coli DNA, which can be used for the detection of E. coli in milk.

Key words: Dairy products, Escherichia coli, Total genomic DNA, PCR

中图分类号: