outbreeding

noun

1. (countable, uncountable)The breeding of unrelated (or only distantly related) individuals.

   “Outbreeding is a positive thing, because of the wider gene pool.”

2. (countable, uncountable)The mating of people from different groups (especially as a result of social proscription).

   “Outbreeding hinders earnest studies of archaeogenetics, making it thorny to know precisely about ancient populations, migrations and linguistic groups.”