Quist D, Chapela I H
Department of Environmental Science, Policy and Management, University of California, Berkeley 94720-3110, USA.
Nature. 2001 Nov 29;414(6863):541-3. doi: 10.1038/35107068.
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 species, and the possibility of unintentionally transferring traits of ecological relevance onto landraces and wild relatives have also been sources of concern. 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 world. 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 crop.
转基因作物的引入对作物起源和多样化地区的作物地方品种及野生近缘种的遗传多样性可能产生影响，这引发了人们的担忧，因为这种多样性被认为对全球粮食安全至关重要。对非目标物种的直接影响，以及无意中将具有生态相关性的性状转移到地方品种和野生近缘种上的可能性，也一直是人们关注的问题。工业作物与其地方品种和野生近缘种中的祖先之间的基因连通程度，是世界各地作物和农业生态系统进化历史的主要决定因素。最近将转基因DNA构建体引入农田提供了测量这种连通性的独特标记。出于这些原因，检测作物地方品种中的转基因DNA至关重要。在此，我们报告在墨西哥瓦哈卡州偏远山区种植的本地玉米地方品种中存在渐渗转基因DNA构建体，该地区是这种作物的中美洲起源和多样化中心的一部分。
