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Transgenic crops in natural habitat. Nature 409, 682-683
| Crawley M., Brown, SL, Hails, RS, Kohn, DD, Rees, M (2001).
| Four different crops (oilseed rape, potato, maize and sugar beet) were grown in 12 different habitats and monitored over a period of 10 years. In no case were the genetically modified plants found to be more invasive or more persistent than their conventional counterparts. These experiments involved GM traits (resistance to herbicides or insects) that were not expected to increase plant fitness in natural habitats.These results do not mean that other genetic modifications could not increase weediness or invasiveness, of crop plants, but they do indicate that arable crops are unlikely to survive for long outside cultivation. The ecological impact of plants with GM traits such as drought tolerance or pest resistance that might be expected to enhance performance under field conditions will need to be assessed experimentally when such plants are developed.
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