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Origin and evolutionary trajectories of brown algal sex chromosomes.

2025-08-25Journal article Open access
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dc.contributor.authorBarrera-Redondo, Josué
dc.contributor.authorLipinska, Agnieszka P.
dc.contributor.authorLiu, Pengfei
dc.contributor.authorDinatale, Erica
dc.contributor.authorCossard, Guillaume
dc.contributor.authorBogaert, Kenny
dc.contributor.authorHoshino, Masakazu
dc.contributor.authorCraig, Rory J.
dc.contributor.authorAvia, Komlan
dc.contributor.authorLeiria, Goncalo
dc.contributor.authorAvdievich, Elena
dc.contributor.authorLiesner, Daniel
dc.contributor.authorLuthringer, Rémy
dc.contributor.authorGodfroy, Olivier
dc.contributor.authorHeesch, Svenja
dc.contributor.authorNehr, Zofia
dc.contributor.authorBrillet-Guéguen, Loraine
dc.contributor.authorPeters, Akira F.
dc.contributor.authorHoarau, Galice
dc.contributor.authorPearson, Gareth Anthony
dc.contributor.authorAury, Jean-Marc
dc.contributor.authorWincker, Patrick
dc.contributor.authorDenoeud, France
dc.contributor.authorCock, J Mark
dc.contributor.authorHaas, Fabian B.
dc.contributor.authorCoelho, Susana M.
dc.date.accessioned2025-09-24T09:19:36Z
dc.date.available2025-09-24T09:19:36Z
dc.date.issued2025-08-25
dc.description.abstractResearch on the biology and evolution of sex chromosomes has primarily focused on diploid XX/XY and ZW/ZZ systems. In contrast, the rise, evolution and demise of U/V systems has remained an enigma. Here we analyse genomes of nine brown algal species with different sexual systems to determine the history of their sex determination. U/V sex chromosomes emerged between 450 and 224 million years ago, when a region containing the pivotal male-determinant MIN ceased recombining. Seven ancestral genes within the sex-determining region show remarkable conservation over this vast evolutionary time, although nested inversions caused expansions of the sex locus, independently in each lineage. We evaluate whether these expansions are associated with increased morphological complexity and sexual differentiation, and show that taxonomically restricted genes evolve unexpectedly often in U and V chromosomes. We also investigate two situations in which U/V-linked regions have changed. First, we demonstrate that convergent evolution of two monoicous species occurred by ancestral males acquiring U-specific genes. Second, the Fucus dioecious system involves new sex-determining gene(s), acting upstream of formerly V-specific genes during development. Both situations have led to the demise of U and V chromosomes and erosion of their specific genomic characteristics.eng
dc.identifier.doi10.1038/s41559-025-02838-w
dc.identifier.other40855228
dc.identifier.urihttp://hdl.handle.net/10400.1/27732
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer Nature
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleOrigin and evolutionary trajectories of brown algal sex chromosomes.eng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleNature Ecology & Evolution
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNamePearson
person.givenNameGareth Anthony
person.identifier113536
person.identifier.ciencia-id3315-9919-1A52
person.identifier.orcid0000-0002-0768-464X
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id55916875600
relation.isAuthorOfPublication0a10c448-c7f5-4c3b-9488-3917c707e35e
relation.isAuthorOfPublication.latestForDiscovery0a10c448-c7f5-4c3b-9488-3917c707e35e

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