absence of detectable transgenes in local landraces of maize in oaxaca, mexico (2003-2004). | in 2000, transgenes were detected in local maize varieties (landraces) in the mountains of oaxaca, mexico [quist, d. & chapela, i. h. (2001) nature 414, 541-543]. this region is part of the mesoamerican center of origin for maize (zea mays l.), and the genetic diversity that is maintained in open-pollinated landraces is recognized as an important genetic resource of great cultural value. the presence of transgenes in landraces was significant because transgenic maize has never been approved for ... | 2005 | 16093316 |