interbreed

The majority of ornamental ducks interbreed freely in captivity.

That the domestic hog in some places in northern Luzon does thus interbreed with the wild ones is a proved fact.

One of the definitions of species is that they will not interbreed and propagate.

Notwithstanding their similarity they do not interbreed when brought together.

My experience tends to show that the two species will not interbreed.