Heterozygote advantage and pleiotropy contribute to intraspecific color trait variability
De Pasqual, C., Suisto, K., Kirvesoja, J., Gordon, S., Ketola, T., & Mappes, J. (2022). Heterozygote advantage and pleiotropy contribute to intraspecific color trait variability. Evolution, 76(10), 2389-2403. https://doi.org/10.1111/evo.14597
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EvolutionAuthors
Date
2022Discipline
ResurssiviisausyhteisöBiologisten vuorovaikutusten huippututkimusyksikköEkologia ja evoluutiobiologiaEvoluutiotutkimus (huippuyksikkö)School of Resource WisdomCentre of Excellence in Biological Interactions ResearchEcology and Evolutionary BiologyCentre of Excellence in Evolutionary ResearchCopyright
© 2022 The Authors. Evolution published by Wiley Periodicals LLC on behalf of The Society for the Study of Evolution
The persistence of intrapopulation phenotypic variation typically requires some form of balancing selection since drift and directional selection eventually erode genetic variation. Heterozygote advantage remains a classic explanation for the maintenance of genetic variation in the face of selection. However, examples of heterozygote advantage, other than those associated with disease resistance are rather uncommon. Across most of its distribution, males of the aposematic moth Arctia plantaginis have two hindwing phenotypes determined by a heritable one locus-two allele polymorphism (genotypes: WW/Wy = white morph, yy = yellow morph). Using genotyped moths we show that the presence of one or two copies of the yellow allele affects several life-history traits. Reproductive output of both males and females, and female mating success are negatively affected by two copies of the yellow allele. Females carrying one yellow allele (i.e. Wy) have higher fertility, hatching success, and offspring survival than either homozygote, thus leading to strong heterozygote advantage. Our results indicate strong female contribution especially at the postcopulatory stage in maintaining the color polymorphism. The interplay between heterozygote advantage, yellow allele pleiotropic effect and morph-specific predation pressure may exert balancing selection on the color locus, suggesting that color polymorphism may be maintained through complex interactions between natural and sexual selection.
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John Wiley & SonsISSN Search the Publication Forum
0014-3820Keywords
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https://converis.jyu.fi/converis/portal/detail/Publication/151816496
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This work was supported by the Academy of Finland (project no. 345091 to JM).License
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