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Open AccessFeature PaperReview

The Guppy Sex Chromosome System and the Sexually Antagonistic Polymorphism Hypothesis for Y Chromosome Recombination Suppression

Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FL, UK
Genes 2018, 9(5), 264; https://doi.org/10.3390/genes9050264
Received: 18 April 2018 / Revised: 11 May 2018 / Accepted: 16 May 2018 / Published: 19 May 2018
(This article belongs to the Special Issue The Evolutionary Life Cycle of Sex Chromosomes)
Sex chromosomes regularly evolve suppressed recombination, distinguishing them from other chromosomes, and the reason for this has been debated for many years. It is now clear that non-recombining sex-linked regions have arisen in different ways in different organisms. A major hypothesis is that a sex-determining gene arises on a chromosome and that sexually antagonistic (SA) selection (sometimes called intra-locus sexual conflict) acting at a linked gene has led to the evolution of recombination suppression in the region, to reduce the frequency of low fitness recombinant genotypes produced. The sex chromosome system of the guppy (Poecilia reticulata) is often cited as supporting this hypothesis because SA selection has been demonstrated to act on male coloration in natural populations of this fish, and probably contributes to maintaining polymorphisms for the genetic factors involved. I review classical genetic and new molecular genetic results from the guppy, and other fish, including approaches for identifying the genome regions carrying sex-determining loci, and suggest that the guppy may exemplify a recently proposed route to sex chromosome evolution. View Full-Text
Keywords: sexual conflict; sexual dimorphism; genetic sexual conflict; sexual dimorphism; genetic
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MDPI and ACS Style

Charlesworth, D. The Guppy Sex Chromosome System and the Sexually Antagonistic Polymorphism Hypothesis for Y Chromosome Recombination Suppression. Genes 2018, 9, 264. https://doi.org/10.3390/genes9050264

AMA Style

Charlesworth D. The Guppy Sex Chromosome System and the Sexually Antagonistic Polymorphism Hypothesis for Y Chromosome Recombination Suppression. Genes. 2018; 9(5):264. https://doi.org/10.3390/genes9050264

Chicago/Turabian Style

Charlesworth, Deborah. 2018. "The Guppy Sex Chromosome System and the Sexually Antagonistic Polymorphism Hypothesis for Y Chromosome Recombination Suppression" Genes 9, no. 5: 264. https://doi.org/10.3390/genes9050264

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