{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T21:25:57Z","timestamp":1791494757530,"version":"4.3.4"},"reference-count":68,"publisher":"Wiley","issue":"24","license":[{"start":{"date-parts":[[2021,10,5]],"date-time":"2021-10-05T00:00:00Z","timestamp":1633392000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Molecular Ecology"],"published-print":{"date-parts":[[2021,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Human\u2010driven translocations of species have diverse evolutionary consequences such as promoting hybridization between previously geographically isolated taxa. This is well illustrated by the solitary tunicate,\n                    <jats:italic>Ciona robusta<\/jats:italic>\n                    , native to the North East Pacific and introduced in the North East Atlantic. It is now co\u2010occurring with its congener\n                    <jats:italic>Ciona intestinalis<\/jats:italic>\n                    in the English Channel, and\n                    <jats:italic>C<\/jats:italic>\n                    .\n                    <jats:italic>roulei<\/jats:italic>\n                    in the Mediterranean Sea. Despite their long allopatric divergence, first and second generation crosses showed a high hybridization success between the introduced and native taxa in the laboratory. However, previous genetic studies failed to provide evidence of recent hybridization between\n                    <jats:italic>C<\/jats:italic>\n                    .\n                    <jats:italic>robusta<\/jats:italic>\n                    and\n                    <jats:italic>C<\/jats:italic>\n                    .\n                    <jats:italic>intestinalis<\/jats:italic>\n                    in the wild. Using SNPs obtained from ddRAD\u2010sequencing of 397 individuals from 26 populations, we further explored the genome\u2010wide population structure of the native\n                    <jats:italic>Ciona<\/jats:italic>\n                    taxa. We first confirmed results documented in previous studies, notably (i) a chaotic genetic structure at regional scale, and (ii) a high genetic similarity between\n                    <jats:italic>C<\/jats:italic>\n                    .\n                    <jats:italic>roulei<\/jats:italic>\n                    and\n                    <jats:italic>C<\/jats:italic>\n                    .\n                    <jats:italic>intestinalis<\/jats:italic>\n                    , which is calling for further taxonomic investigation. More importantly, and unexpectedly, we also observed a genomic hotspot of long introgressed\n                    <jats:italic>C<\/jats:italic>\n                    .\n                    <jats:italic>robusta<\/jats:italic>\n                    tracts into\n                    <jats:italic>C<\/jats:italic>\n                    .\n                    <jats:italic>intestinalis<\/jats:italic>\n                    genomes at several locations of their contact zone. Both the genomic architecture of introgression, restricted to a 1.5\u00a0Mb region of chromosome 5, and its absence in allopatric populations suggest introgression is recent and occurred after the introduction of the non\u2010native species. Overall, our study shows that anthropogenic hybridization can be effective in promoting introgression breakthroughs between species at a late stage of the speciation continuum.\n                  <\/jats:p>","DOI":"10.1111\/mec.16189","type":"journal-article","created":{"date-parts":[[2021,9,21]],"date-time":"2021-09-21T12:47:19Z","timestamp":1632228439000},"page":"6718-6732","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["An introgression breakthrough left by an anthropogenic contact between two ascidians"],"prefix":"10.1111","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9124-6844","authenticated-orcid":false,"given":"Alan","family":"Le Moan","sequence":"first","affiliation":[{"name":"Sorbonne Universit\u00e9 CNRS UMR 7144 Station Biologique de Roscoff Roscoff France"},{"name":"Department of Marine Sciences Tj\u00e4rn\u00f6 Marine Laboratory University of Gothenburg Str\u00f6mstad Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlotte","family":"Roby","sequence":"additional","affiliation":[{"name":"Sorbonne Universit\u00e9 CNRS UMR 7144 Station Biologique de Roscoff Roscoff France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8441-5075","authenticated-orcid":false,"given":"Christelle","family":"Fra\u00efsse","sequence":"additional","affiliation":[{"name":"CNRS Universit\u00e9 Lille UMR 8198 \u2013 Evo\u2010Eco\u2010Paleo Lille France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4665-6411","authenticated-orcid":false,"given":"Claire","family":"Daguin\u2010Thi\u00e9baut","sequence":"additional","affiliation":[{"name":"Sorbonne Universit\u00e9 CNRS UMR 7144 Station Biologique de Roscoff Roscoff France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1856-3197","authenticated-orcid":false,"given":"Nicolas","family":"Bierne","sequence":"additional","affiliation":[{"name":"ISEM Univ Montpellier, CNRS, IRD Montpellier France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5603-9527","authenticated-orcid":false,"given":"Fr\u00e9d\u00e9rique","family":"Viard","sequence":"additional","affiliation":[{"name":"Sorbonne Universit\u00e9 CNRS UMR 7144 Station Biologique de Roscoff Roscoff France"},{"name":"ISEM Univ Montpellier, CNRS, IRD Montpellier 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