interbreeding

nouns

(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids
cross, crossbreeding, crossing, hybridisation, hybridization, hybridizing, interbreeding
is derived from
interbreed
reproduction by parents of different races (especially by white and non-white persons)
crossbreeding, interbreeding, miscegenation
is derived from
interbreed