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Detection of eight GMO maize events by qualitative, multiplex PCR and fluorescence capillary gel electrophoresis

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Abstract

Specific legislation in the EU and several other countries requires that foods containing genetically modified organisms (GMOs) should be approved and labelled. This has necessitated the development of methods for detection of such materials. For screening purposes these methods should preferably enable detection of several different GMOs. Here we present a simple, robust, qualitative, nineplex PCR method for event-specific detection of maize T25, GA21, TC1507, MON863, MON810, NK603, construct specific detection of BT176, BT11 and detection of the endogenous hmga maize reference gene. PCR is carried out with primers labelled with fluorescent groups and the amplicons are detected using fluorescence capillary electrophoresis. Using mixtures of DNA from different certified reference materials, the detection limit was determined to approximately 0.1% for each GMO. Good agreement was observed in 85 of 88 determinations when eleven food and feed samples were analysed using the multiplex PCR assay and compared to results from quantitative real-time 5′-nuclease PCR. Discrepancies were only observed for one GMO at or close to the detection limit. The presented method is therefore suitable for screening purposes for food and feed containing the most common maize GMOs.

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Acknowledgments

This work was supported by the Norwegian Research Council project 154254/130 and the EU 6th Framework project “Co-Extra”. We want to thank Signe Drømtorp and Brit Oppegård Pedersen for technical assistance.

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Authors and Affiliations

  1. Matforsk, Norwegian Food Research Institute, Osloveien 1, 1430, Aas, Norway

    B. R. Heide, E. Heir & A. Holck

  2. The Norwegian University of Life Sciences (UMB), P.O. Box 5003, 1432, Aas, Norway

    B. R. Heide

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  1. B. R. Heide
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  2. E. Heir
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  3. A. Holck
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Correspondence to A. Holck.

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Heide, B.R., Heir, E. & Holck, A. Detection of eight GMO maize events by qualitative, multiplex PCR and fluorescence capillary gel electrophoresis. Eur Food Res Technol 227, 527–535 (2008). https://doi.org/10.1007/s00217-007-0751-4

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  • DOI: https://doi.org/10.1007/s00217-007-0751-4

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