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Digest: Hybrid incompatibilities and introgression in wild monkeyflowers
Michelle C Stitzer1, Philipp Brand1
1Center for Population Biology, Department of Evolution and Ecology, University of California, Davis, California, 95616.
Abstract:
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.
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