外がい交こう弱じゃく勢せい

noun

outbreeding depression

Rare technical term in biology/genetics. Refers to reduced fitness when genetically distant individuals mate, often due to breaking of coadapted gene complexes or local adaptation.

• 外がい交こう弱じゃく勢せいは、遠とお縁えんの個こ体たい間かんの交こう配はいによって子し孫そんの適てき応おう度どが低てい下かする現げん象しょうを指さす。

  Outbreeding depression refers to the phenomenon where offspring fitness declines due to mating between distantly related individuals.