outbreeding

out.breed.ing

n.（名词）
The breeding of distantly related or unrelated individuals, often producing a hybrid of superior quality.
远交：远亲缘或非亲缘交配，常产生较高质量的混种
Anthropology The mating of persons from different groups, often as a consequence of taboos against marriage within the group.
【人类学】 族外婚：分属不同群体的人之间的婚姻，常由不准族内通婚的禁忌导致