Introgression

Introgression is the flow of alleles from one species or sub-species Some species are endangered
due to genetic ‘swamping’ by interbreeding with abundant related species. Genetic analyses
can be used to detect introgression and hybrid individuals to another. Typically, hybridizations occur when humans introduce exotic species into the range of related rare species, or alter habitat
so that previously isolated species are now in secondary contact. Introgression is a threat to the genetic integrity of a range of canid, duck, fish, plant, and other species