noun
outcrossing; outbreeding
Technical term in genetics and breeding, referring to mating between unrelated individuals of the same species to increase genetic diversity.
外交配は、遺伝的多様性を高めるために行われる。
Outcrossing is carried out to increase genetic diversity.
この品種は外交配によって改良された。
This variety was improved through outbreeding.
交配 is a broader term for mating or crossbreeding, while 外交配 specifically refers to outcrossing.
Compound of 外 (outside) + 交配 (mating, crossbreeding). The term is a direct calque from English 'outcrossing' or 'outbreeding'.