Looks like it may have been Monsanto:

Unapproved genetically engineered wheat has been found growing on a farm in Oregon, federal officials said Wednesday, a development that could disrupt American exports of the grain.

The Agriculture Department said the wheat was of the type developed by Monsanto to be resistant to the herbicide Roundup, also known as glyphosate. Such wheat was field-tested in 16 states, including Oregon, from 1998 through 2005, but Monsanto dropped the project before the wheat was ever approved for commercial planting.

Zero countries have approved genetically modified wheat, so if this rogue wheat got into our country's wheat supply—either for domestic consumption or export—it could be an expensive problem. According to the New York Times, wheat is a $17.9 billion industry in America.