Disruptive Selection

(redirected from Diversifying selection)
Also found in: Medical.

Disruptive Selection

 

a type of natural selection in an animal or plant population resulting in the appearance of two or several new forms from a single inceptive one. For example, in the absence of food necessary for the growing young of perch, that is, the fingerlings of other fish, there may remain only “dwarfs” (individuals with severely retarded growth, who may feed for a long time on plankton crustaceans) and “giants” (individuals capable by the end of their first year of feeding on fingerling perch of their own generation). As a result of disruptive selection, in a number of years genetically conditioned races of giants and dwarfs are formed in a body of water.

References in periodicals archive ?
Branch site REL analysis results reveled 10 branches under episodic diversifying selection at p [less than or equal to] 0.
Put another way, there may be balancing selection for the same ovipositor length in all first generation bivoltine crickets, while diversifying selection among populations with differing season lengths is the norm for crickets producing overwintering eggs.