Hybridization, sex-specific genomic architecture and local adaptation

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
Anna RunemarkJoana I Meier

Abstract

While gene flow can reduce the potential for local adaptation, hybridization may conversely provide genetic variation that increases the potential for local adaptation. Hybridization may also affect adaptation through altering sexual dimorphism and sexual conflict, but this remains largely unstudied. Here, we discuss how hybridization may affect sexual dimorphism and conflict due to differential effects of hybridization on males and females, and then how this, in turn, may affect local adaptation. First, in species with heterochromatic sexes, the lower viability of the heterogametic sex in hybrids could shift the balance in sexual conflict. Second, sex-specific inheritance of the mitochondrial genome in hybrids may lead to cytonuclear mismatches, for example, in the form of 'mother's curse', with potential consequences for sex ratio and sex-specific expression. Third, sex-biased introgression and recombination may lead to sex-specific consequences of hybridization. Fourth, transgressive segregation of sexually antagonistic alleles could increase sexual dimorphism in hybrid populations. Sexual dimorphism can reduce sexual conflict and enhance intersexual niche partitioning, increasing the fitness of hybrids. Adaptive introgressi...Continue Reading

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Citations

Nov 28, 2019·PLoS Genetics·Anna RunemarkJoana I Meier
Aug 29, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Tim ConnallonXiang-Yi Li
Aug 29, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Anders Forsman
May 6, 2020·Nature Ecology & Evolution·Sangeet LamichhaneyLeif Andersson
Nov 11, 2019·Trends in Ecology & Evolution·Pierre NouhaudJonna Kulmuni
Jul 27, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Matthias StöckKarel Janko
Jul 13, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Matthias StöckYann Guiguen

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