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How is variation in fitness maintained?

Evolution; international journal of organic evolution - 13 May 2026

Charlesworth Brian

Abstract excerpt

The existence of substantial additive genetic variance in fitness poses a long-standing question for evolutionary geneticists. A new theoretical paper by Connallon and Czuppon examines the effect of random genetic drift and temporal fluctuations in fitness on loci maintained by balancing selection. It suggests ways in which substantial additive variance can be maintained, by causing loci to depart from their...

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PMID: 41790487
DOI: 10.1093/evolut/qpag035

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