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Transgenic canola plants in North Dakota had pedigreed genes making them resistant to herbicides, such as the weed killer Roundup. Researchers collected and protected 406 canola plants along thousands of miles of state roads. They found 347 carrying at least one generation gene. There were also gives that the inserted genes were being passed on to new generations, producing some plants in the wild with multiple transgenes. The findings were presented on August 6th at the annual meeting of the archeological Society of America in Pittsburgh.