Adaptive divergence and the evolution of hybrid trait mismatch in threespine stickleback.

ABSTRACT: Selection against mismatched traits in hybrids is the phenotypic analogue of intrinsic hybrid incompatibilities. Mismatch occurs when hybrids resemble one parent population for some phenotypic traits and the other parent population for other traits, and is caused by dominance in opposing directions or from segregation of alleles in recombinant hybrids. In this study, we used threespine stickleback fish (Gasterosteus aculeatus L.) to test the theoretical prediction that trait mismatch in hybrids should increase with the magnitude of phenotypic divergence between parent populations. We measured morphological traits in parents and hybrids in crosses between a marine population representing the ancestral form and twelve freshwater populations that have diverged from this ancestral state

SUBMITTER: Chhina AK 

PROVIDER: S-EPMC8802241 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature