Study provides new understanding of spontaneous hybridization

This is an interesting article to read in light of questions about movement of herbicide-resistant genes among crop varieties or outcrossings to wild plants. CLICK ON HEADING.
Synopsis: Plant and animal breeders have long used hybridization to transfer useful traits between species. But does the same process happen without human aid? In a new study in the June issue of American Naturalist, researchers from Indiana University and Rice University explore how spontaneous hybridization – known as adaptive trait introgression – has a vital impact on adaptation and evolutionary diversification.