¿Maíz transgénico en Oaxaca? Estudio reciente dice que ni maiz

La otra nota que leí en SciAm y que me pareció interesante es la siguiente. Posiblemente no muchos recuerden la controversia que se desató en 2001 por lo que aparentaba ser la posible contaminación del material genético del maíz en Oaxaca con variedades genéticamente modificadas. En su momento el descubrimiento fue controversial porque, al parecer, la evidencia no era suficiente. Pues bien, ahora un grupo de científicos mexicanos y estadounidenses han hecho un estudio amplio y no encontraron nada. Aquí la nota del Scientific American:

In 2001 a controversial Nature paper reported that genetically modified corn ended up where none should be in the Mexican state of Oaxaca, raising concern that the transgenic varieties might invade the natural population. The journal disavowed that paper the next year on insufficient evidence, but subsequent Mexican government studies backed it. New research supports Nature’s disavowal, Mexican and U.S. researchers analyzed nearly 154,000 seeds from 870 maize plants in 125 fields over two years in Oaxaca, looking for traces of engineered genes. After expecting a transgenic presence as high as 5 to 10 percent, they were surprised to find no traces. The scientists suggest transgenic maize may not have survived in the harsh mountain climate and soil in which indigenous corn mainly grows and that local farmers may have taken extra precautions with their seed stocks after they became aware of potentially uninvited genes. The Proceedings of the National Academy of Sciences USA published the findings online August 10.