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Genomic footprints of selfing, introduction history, and long-distance dispersal in an invasive alien plant

2026-05-22Artigo científico Acesso aberto
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datacite.subject.sdg15:Proteger a Vida Terrestre
datacite.subject.sdg13:Ação Climática
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorSánchez-García, Raúl
dc.contributor.authorGreen, Andy J
dc.contributor.authorOrtiz, María A
dc.contributor.authorGarcía, Cristina
dc.contributor.authorHortas, Francisco
dc.contributor.authorReynolds, Chevonne
dc.contributor.authorRowntree, Jennifer
dc.contributor.authorSerrao, Ester A.
dc.contributor.authorTomasson, Lina
dc.contributor.authorTremetsberger, Karin
dc.contributor.authorLeeuwen, Casper H A van
dc.contributor.authorOrtego, Joaquín
dc.contributor.editorSangeet Lamichhaney
dc.date.accessioned2026-06-30T17:22:32Z
dc.date.available2026-06-30T17:22:32Z
dc.date.issued2026-05-22
dc.description.abstractBiological invasions are natural experiments for studying the evolutionary and ecological processes underlying colonization success and range expansion. Using genome-wide data—generated via genotyping-by-sequencing (GBS) from 30 populations spanning Europe and South Africa—we investigated the colonization history and successful spread of the invasive buttonweed Cotula coronopifolia, an annual plant introduced into Europe from South Africa about 300 years ago. Our analyses identified three major lineages in Europe distributed across the continent, often co-occurring without evidence of admixture. Phylogenomic dating revealed that these lineages diverged > 2,000 years ago—well before the earliest European records—suggesting divergence within the native range and either multiple introductions or a single introduction with multiple lineages. Mating-system inference shows that reproduction occurs primarily via self-fertilization (∼70% on average), although outcrossing predominates in some populations, revealing a facultative mating system. This high selfing rate has led to extremely low heterozygosity in most populations and a strong genetic structure. Genetic clustering also revealed admixed individuals resulting from rare inter-lineage outcrossing; comparisons of empirical and simulated data indicate that increased diversity after sporadic admixture events decays rapidly under subsequent selfing. Both the introduction history and long-distance dispersal facilitated by waterbirds likely explain the scattered distribution of lineages across Europe. Altogether, these results illustrate Baker’s “ideal weed” concept, highlighting the role of a flexible mating system in providing reproductive assurance during colonization and showing how predominant selfing can shape the genomic landscape of an invasive species.eng
dc.description.sponsorshipUID/04326/2025
dc.identifier.doi10.1093/gbe/evag124
dc.identifier.issn1759-6653
dc.identifier.urihttp://hdl.handle.net/10400.1/29180
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAdvance Access publication
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofGenome Biology and Evolution
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectButtonweed
dc.subjectCotula coronopifolia
dc.subjectGenomics of invasions
dc.subjectPopulation genomics
dc.subjectSeed dispersal
dc.subjectSelfing
dc.titleGenomic footprints of selfing, introduction history, and long-distance dispersal in an invasive alien planteng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberLA/P/0101/2020
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.issue6
oaire.citation.titleGenome Biology and Evolution
oaire.citation.volume18
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameSerrao
person.givenNameEster A.
person.identifierC-6686-2012
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0003-1316-658X
person.identifier.scopus-author-id7004093604
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isProjectOfPublication794d4c77-c731-471e-bc96-5a41dcd3d872
relation.isProjectOfPublication.latestForDiscovery794d4c77-c731-471e-bc96-5a41dcd3d872

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