DNA extraction techniques compared for accurate detection of genetically modified organisms (GMOs) in maize food and feed products

TÜRKEÇ A., Kazan H., Karacanli B., LUCAS S.

JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE, vol.52, no.8, pp.5164-5171, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 8
  • Publication Date: 2015
  • Doi Number: 10.1007/s13197-014-1547-8
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5164-5171
  • Keywords: Food, Feed, GM maize, DNA extraction, Multiplex real-time PCR screening, REAL-TIME PCR, TRACEABILITY, SOY
  • Bursa Uludag University Affiliated: Yes


In this paper, DNA extraction methods have been evaluated to detect the presence of genetically modified organisms (GMOs) in maize food and feed products commercialised in Turkey. All the extraction methods tested performed well for the majority of maize foods and feed products analysed. However, the highest DNA content was achieved by the Wizard, Genespin or the CTAB method, all of which produced optimal DNA yield and purity for different maize food and feed products. The samples were then screened for the presence of GM elements, along with certified reference materials. Of the food and feed samples, 8 % tested positive for the presence of one GM element (NOS terminator), of which half (4 % of the total) also contained a second element (the Cauliflower Mosaic Virus 35S promoter). The results obtained herein clearly demonstrate the presence of GM maize in the Turkish market, and that the Foodproof GMO Screening Kit provides reliable screening of maize food and feed products.