动词（使）异种交配，（使）混种，（使）杂种繁殖( interbreed的现在分词 ); 自群育种

noun

1. reproduction by parents of different races (especially by white and non-white persons)

Synonym: miscegenationcrossbreeding

2. (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

Synonym: hybridizationhybridisationcrossbreedingcrossingcrosshybridizing