Transgene introgression from genetically modified crops to their wild relatives

  title={Transgene introgression from genetically modified crops to their wild relatives},
  author={C. Neal Stewart and Matthew D. Halfhill and Suzanne I. Warwick},
  journal={Nature Reviews Genetics},
Transgenes engineered into annual crops could be unintentionally introduced into the genomes of their free-living wild relatives. The fear is that these transgenes might persist in the environment and have negative ecological consequences. Are some crops or transgenic traits of more concern than others? Are there natural genetic barriers to minimize gene escape? Can the genetic transformation process be exploited to produce new barriers to gene flow? Questions abound, but luckily so do answers. 
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