FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (24): 355-358.doi: 10.7506/spkx1002-6630-200924079

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DNA Extraction from Soybeans and Detection of Genetically-Modified Components by Touchdown PCR

CHEN Yan1,2,PAN Jian1,*,WANG Ya2,HUI Ai-ling1,YANG Yi1   

  1. (1. Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei 230009, China;
    2. School of Life Science, Anhui University, Hefei 230039, China)
  • Received:2008-12-26 Online:2009-12-15 Published:2010-12-29
  • Contact: PAN Jian1,*, E-mail:panxie163@163.com

Abstract:

The DNA geneome were extracted from 8 species of soybeans sold in commercial markets of Anhui province by Improved CTAB method, high salt and low pH method, plant genomic DNA mini-prep kit and SDS method. Touchdown polymerase chain reaction (TD-PCR) was applied to detect the genetically modified components in soybeans for the first time. The positive amplification productions were also analyzed by endonuclease. The experiment results showed that the improved CTAB method was suitable for all kinds of molecular analysis due to its simplicity and high efficiency. The TD-PCR was able to significantly improve the specificity and efficiency of PCR products. It would provide a new method for detection of genetically modified components.

Key words: soybean, genetically modified component, improved CTAB method, TD-PCR

CLC Number: