Digest: Hybrid incompatibilities and introgression in wild monkeyflowers.

Published in: Evolution; international journal of organic evolution (2018)

How are alleles that are detrimental to fitness maintained in natural populations? Zuellig and Sweigart (2018a) find that alleles from a two-locus hybrid incompatibility system segregate at considerable frequencies in two species of monkeyflowers, suggesting that despite providing a fitness cost, these alleles remain polymorphic as a consequence of gene flow between the two species. The system provides the potential to understand the evolutionary trajectory of hybrid incompatibilities and their role in speciation.

Keyphrases

genetic diversity
body composition
physical activity
genome wide
copy number
gene expression
dna methylation