It's a Weed, It's a Transgene, It's Superweed!
People are worried about the creation of a “superweed” when transgenes move from crops to wild relatives that might already be weedy. One example of such an interbreeding crop-weed system is canola (a crop) and its wild relative (wild turnip). An insect resistant transgene was purposefully transferred from canola to wild turnip via hybridization, and the effects were observed. The result was not a superweed, but rather a weed that was not quite as competitive as the non-transgenic weed. Population genetics and forces of evolution, and how these might interact in shaping any superweed scenarios are discussed. It is argued that it will be very difficult for one or two transgenes to convert a weed into a superweed.
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