Wheat is wind pollinated, not by insects.
Exactly right. And the implications of this are that cross-hybridization as likely occurred in Oregon could recur anywhere where there is.... wind.
Yes, there was a study done in Colorado which found some cross pollination was possible for up to a mile from the variety tested for cross pollination.
They were testing the gene for round up resistance. They sprayed fields in the area around the test plot and the variability of cross pollination was amazing.
General conclusion was that cross contamination in handling was a major issue that is hard to address. I am aware of that. We plant, grow, store and process our seed on our own farms. We are the only ones who handle it, Planting through point of sale. If I have contamination, it is our fault, not that of others. I know how careful we are and we seldom have issues.