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The European whitefish (Coregonus lavaretus) species complex is a classic example of recent adaptive radiation. Here we examine a whitefish population introduced to northern Finnish Lake Tsahkal in the late 1960’s, where three divergent morphs (viz. littoral, pelagic and profundal feeders) were found ten generations after. Using demographic modelling based on genomic data we show that whitefish morphs evolved during a phase of strict isolation, refuting a rapid sympatric divergence scenario. The lake is now an artificial hybrid zone between morphs originated in allopatry. Despite their current syntopy, clear genetic differentiation remains between two of the three morphs. Using admixture mapping we identify five SNPs associated with gonad weight variation, a proxy for sexual maturity and spawning time. We suggest that ecological adaptations in spawning time evolved in allopatry are currently maintaining partial reproductive isolation in the absence of other barriers to gene flow.

", "funding": [ { "award": { "id": "05k73zm37::129662", "number": "129662", "title": { "en": "Centre of Excellence in Evolutionary Genetics and Physiology" } }, "funder": { "id": "05k73zm37", "name": "Research Council of Finland" } }, { "award": { "id": "05k73zm37::218343", "number": "218343", "title": { "en": "Evolutionary Genetics of Adaptation in the Wild" } }, "funder": { "id": "05k73zm37", "name": "Research Council of Finland" } }, { "award": { "id": "05k73zm37::316294", "number": "316294", "title": { "en": "Evolutionary and conservation genomics of rapid ecological speciation in the Baltic Sea" } }, "funder": { "id": "05k73zm37", "name": "Research Council of Finland" } } ], "publication_date": "2022-05-01", "publisher": "Zenodo", "resource_type": { "id": "publication-article", "title": { "de": "Zeitschriftenartikel", "en": "Journal article" } }, "rights": [ { "description": { "en": "The Creative Commons Attribution license allows re-distribution and re-use of a licensed work on the condition that the creator is appropriately credited." }, "icon": "cc-by-icon", "id": "cc-by-4.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/licenses/by/4.0/legalcode" }, "title": { "en": "Creative Commons Attribution 4.0 International" } } ], "subjects": [ { "subject": "Coregonus lavaretus" }, { "subject": "whitefish" }, { "subject": "admixture mapping" }, { "subject": "gonad weight" }, { "subject": "demographic modelling" } ], "title": "Allopatric origin of sympatric whitefish morphs with insights on the genetic basis of their reproductive isolation" }, "parent": { "access": { "owned_by": { "user": "215671" } }, "communities": {}, "id": "5519632", "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.5519632", "provider": "datacite" } } }, "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.5519633", "provider": "datacite" }, "oai": { "identifier": "oai:zenodo.org:5519633", "provider": "oai" } }, "revision_id": 3, "stats": { "all_versions": { "data_volume": 54596144.0, "downloads": 83, "unique_downloads": 80, "unique_views": 122, "views": 128 }, "this_version": { "data_volume": 51090798.0, "downloads": 81, "unique_downloads": 79, "unique_views": 121, "views": 126 } }, "status": "published", "swh": {}, "updated": "2022-04-07T13:49:21.536679+00:00", "versions": { "index": 1, "is_latest": true } }