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Dominance reversals: the resolution of genetic conflict and maintenance of genetic variation
Stockholm University, Faculty of Science, Department of Molecular Biosciences, The Wenner-Gren Institute. University of East Anglia, UK; University of Toronto, Canada.ORCID iD: 0000-0001-8925-5066
Number of Authors: 32024 (English)In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 291, no 2018, article id 20232816Article, review/survey (Refereed) Published
Abstract [en]

Beneficial reversals of dominance reduce the costs of genetic trade-offs and can enable selection to maintain genetic variation for fitness. Beneficial dominance reversals are characterized by the beneficial allele for a given context (e.g. habitat, developmental stage, trait or sex) being dominant in that context but recessive where deleterious. This context dependence at least partially mitigates the fitness consequence of heterozygotes carrying one non-beneficial allele for their context and can result in balancing selection that maintains alternative alleles. Dominance reversals are theoretically plausible and are supported by mounting empirical evidence. Here, we highlight the importance of beneficial dominance reversals as a mechanism for the mitigation of genetic conflict and review the theory and empirical evidence for them. We identify some areas in need of further research and development and outline three methods that could facilitate the identification of antagonistic genetic variation (dominance ordination, allele-specific expression and allele-specific ATAC-Seq (assay for transposase-accessible chromatin with sequencing)). There is ample scope for the development of new empirical methods as well as reanalysis of existing data through the lens of dominance reversals. A greater focus on this topic will expand our understanding of the mechanisms that resolve genetic conflict and whether they maintain genetic variation.

Place, publisher, year, edition, pages
2024. Vol. 291, no 2018, article id 20232816
Keywords [en]
antagonistic pleiotropy, balancing selection, dominance reversal, genetic conflict, genetic trade-offs, genetic variation
National Category
Genetics and Genomics
Identifiers
URN: urn:nbn:se:su:diva-228874DOI: 10.1098/rspb.2023.2816ISI: 001183512400004PubMedID: 38471544Scopus ID: 2-s2.0-85187656524OAI: oai:DiVA.org:su-228874DiVA, id: diva2:1856185
Available from: 2024-05-06 Created: 2024-05-06 Last updated: 2025-02-07Bibliographically approved

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Grieshop, Karl

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