Transgenic DNA introgressed into traditional maize landraces in Oaxaca, Mexico

David Quist and Ignacio H. Chapela ()
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David Quist: Policy and Management, University of California
Ignacio H. Chapela: Policy and Management, University of California

Nature, 2001, vol. 414, issue 6863, 541-543

Abstract: Abstract Concerns have been raised about the potential effects of transgenic introductions on the genetic diversity of crop landraces and wild relatives in areas of crop origin and diversification, as this diversity is considered essential for global food security. Direct effects on non-target species1,2, and the possibility of unintentionally transferring traits of ecological relevance onto landraces and wild relatives have also been sources of concern3,4. The degree of genetic connectivity between industrial crops and their progenitors in landraces and wild relatives is a principal determinant of the evolutionary history of crops and agroecosystems throughout the world5,6. Recent introductions of transgenic DNA constructs into agricultural fields provide unique markers to measure such connectivity. For these reasons, the detection of transgenic DNA in crop landraces is of critical importance. Here we report the presence of introgressed transgenic DNA constructs in native maize landraces grown in remote mountains in Oaxaca, Mexico, part of the Mesoamerican centre of origin and diversification of this crop7,8,9.

Date: 2001
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DOI: 10.1038/35107068

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