食品科学 ›› 2009, Vol. 30 ›› Issue (3): 231-234.doi: 10.7506/spkx1002-6630-200903052

• 生物工程 • 上一篇    下一篇

用于转基因检测的水果果肉总DNA提取法

段婧婧1,肖琳1,陈军2   

  1. 1.污染控制与资源化研究国家重点实验室,南京大学环境学院 2.苏州出入境检验检疫局
  • 收稿日期:2008-03-07 修回日期:2008-08-02 出版日期:2009-02-01 发布日期:2010-12-29
  • 通讯作者: 段婧婧 E-mail:duanjingjing_23@163.com

Study on DNA Extraction from Fresh Fruit for Detection of Genetically Modified Organism

DUAN Jing-jing1,XIAO Lin1,*,CHEN Jun2   

  1. (1.State Key Laboratory of Pollution Control and Resource Reuses, School of Environment, Nanjing University, Nanjing 210093,
    China ;2.Suzhou Entry-Exit Inspection and Quarantine Bureau, Suzhou 215004, China)
  • Received:2008-03-07 Revised:2008-08-02 Online:2009-02-01 Published:2010-12-29
  • Contact: DUAN Jing-jing1 E-mail:duanjingjing_23@163.com

摘要:

本研究以木瓜等水果果肉为实验材料,对改进的CTAB 提取方法进行优化,探讨适宜的果肉冷冻干燥粉的量和聚乙烯吡咯烷酮(PVP)的添加量。最终确定加入0.10g 果肉冷冻干燥粉较为合适,提取缓冲液中PVP 添加1.0% 时效果较好。此方法有效的去除了水果果肉中多酚和多糖类物质的影响,提取出的DNA 浓度较高,A260/A280 值介于1.80~2.00 之间。通过比较,改进的CTAB 法优于SDS 法和DNA 提取试剂盒法。以所提取出的木瓜、哈密瓜、香蕉、梨果肉总DNA 为模板,对内源rbcL 基因进行PCR 扩增,均得到了433bp 大小的目的条带。

关键词: 转基因, 水果, DNA提取

Abstract:

This study optimized the method of modified CTAB from fruit fleshes such as papaya, ect. The results showed that the optimum amount of lyophilized fruit powder is 0.10 g and the best proportion of polyvinyl pyrrolidone (PVP) added into extraction buffer is 1.0%. Furthermore, by this method, the effects of polyphenolics and polysaccharides in fleshes are effectively removed, the concentration of isolated genomic DNAs is high, and the value of A260/A280 is between 1.80 and 2.00. Compared to SDS method and DNA extraction kit, this modified CTAB method is better. Using DNAs isolated from papaya, cantaloupe, banana and pear as templates, endogenous rbcL genes are amplified through PCR reaction and objective bands of about 433 bp are obtained.

Key words: genetically modified organism (GMO), fruits, DNA extraction

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