Genetic linkage of distinct adaptive traits in sympatrically speciating crater lake cichlid fish

Abstract

Genetic linkage of ecologically relevant traits has been suggested to facilitate sympatric speciation. Here, Fruciano et al. show in sister species of cichlid fish the genetic non-independence of genomic regions responsible for differentiation in body size and pharyngeal jaw morphology, two characters associated with adaptive divergence in sympatry.