Long-term Experimental Hybridisation Results in the Evolution of a New Sex Chromosome in Swordtail Fish

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dc.contributor.authorFranchini, Paolo
dc.contributor.authorJones, Julia C.
dc.contributor.authorXiong, Peiwen
dc.contributor.authorKneitz, Susanne
dc.contributor.authorGompert, Zachariah
dc.contributor.authorWarren, Wesley C.
dc.contributor.authorWalter, Ronald B.
dc.contributor.authorMeyer, Axel
dc.contributor.authorSchartl, Manfred
dc.date.accessioned2019-08-05T14:32:21Z
dc.date.available2019-08-05T14:32:21Z
dc.date.issued2018-12-03
dc.description.abstractThe remarkable diversity of sex determination mechanisms known in fish may be fuelled by exceptionally high rates of sex chromosome turnovers or transitions. However, the evolutionary causes and genomic mechanisms underlying this variation and instability are yet to be understood. Here we report on an over 30-year evolutionary experiment in which we tested the genomic consequences of hybridisation and selection between two Xiphophorus fish species with different sex chromosome systems. We find that introgression and imposing selection for pigmentation phenotypes results in the retention of an unexpectedly large maternally derived genomic region. During the hybridisation process, the sex-determining region of the X chromosome from one parental species was translocated to an autosome in the hybrids leading to the evolution of a new sex chromosome. Our results highlight the complexity of factors contributing to patterns observed in hybrid genomes, and we experimentally demonstrate that hybridisation can catalyze rapid evolution of a new sex chromosome.
dc.description.departmentChemistry and Biochemistry
dc.formatText
dc.format.extent11 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationFranchini, P., Jones, J. C., Xiong, P., Kneitz, S., Gompert, Z., Warren, W. C., Walter, R. B., Meyer, A., & Schartl, M. (2018). Long-term experimental hybridisation results in the evolution of a new sex chromosome in swordtail fish. Nature Communications, 9(1), 5136.
dc.identifier.doihttps://doi.org/10.1038/s41467-018-07648-2
dc.identifier.urihttps://hdl.handle.net/10877/8451
dc.language.isoen
dc.publisherNature Research
dc.rights.holder© 2018 The Author(s).
dc.rights.licenseThis work is licensed under a Creative Commons Attribution 4.0 International License.
dc.sourceNature Communications, 2018, Vol. 9, No 1, Article 5136.
dc.subjecthybridisation
dc.subjectsex chromosomes
dc.subjectswordtail fish
dc.subjectxiphophorus fish species
dc.subjectChemistry and Biochemistry
dc.titleLong-term Experimental Hybridisation Results in the Evolution of a New Sex Chromosome in Swordtail Fish
dc.typeArticle

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