Understanding early stages of speciation: Allopatric divergence, introgression and chromosomal dynamics in the Erysimum odoratum species complex

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dc.contributor.authorBačák, Richard
dc.contributor.authorŠlenker, Marek
dc.contributor.authorŠingliarová, Barbora
dc.contributor.authorMandáková, Terezie
dc.contributor.authorSkokanová, Katarína
dc.contributor.authorTurisová, Ingrid
dc.contributor.authorTuris, Peter
dc.contributor.authorSmatanová, Janka
dc.contributor.authorZozomová-Lihová, Judita
dc.date.accessioned2026-04-24T06:23:22Z
dc.date.available2026-04-24T06:23:22Z
dc.date.issued2026
dc.descriptionIn: Molecular phylogenetics and evolution. San Diego : Academic Press, 2026. ISSN 1055-7903. Vol. 214 (2026), pp. [1-17].
dc.description.abstractAccurate species delimitation is essential for understanding biodiversity and evolutionary processes, yet it remains challenging in taxonomically complex groups shaped by recent divergence and reticulate evolution. Nevertheless, such groups offer unique insights into the earliest stages of speciation and its driving forces. The genus Erysimum (Brassicaceae), notable for its karyological diversity and high endemism, represents an excellent model for such studies. Here, we investigated the E. odoratum complex, encompassing up to 10 recognized species in the Carpathians and western Balkans, to test its monophyletic origin, clarify species boundaries and elucidate the main drivers of diversification. We combined cytotype screening (chromosome counting and flow cytometry), morphometric analysis, and two high-throughput sequencing methods: RADseq, to resolve phylogenetic relationships as well as to detect fine-scale genetic structure and introgression; and target enrichment (Hyb-Seq), to elucidate polyploid origins. Our results demonstrate that the studied complex is polyphyletic, and we focused on the lineage comprising E. odoratum s.str. and Carpathian species. Phylogenomic data from the Carpathians contradict traditional taxonomy, which recognized up to four diploid endemics, and instead support a single species, E. witmannii with geographically structured genetic variation. Within E. odoratum s.str., we identified multiple polyploid cytotypes resulting from independent auto- and allopolyploidization events, although disentangling parental subgenomes, ancestral polymorphisms, and introgression remains difficult. We propose that diversification in this species complex has been driven by a combination of allopatric divergence and reticulate evolution (involving both introgression and allopolyploidy), further shaped by chromosomal dynamics such as dysploidy.
dc.description.sponsorshipIna 09I03-03-V04-00494 Centrum biológie rastlín a biodiverzity Slovenskej akadémie vied Ministerstvo školstva, mládeže a telovýchovy ČR 90254 e-INFRA CZ
dc.identifier.doihttps://doi.org/10.1016/j.ympev.2025.108481
dc.identifier.issn1055-7903
dc.identifier.issn1095-9513
dc.identifier.urihttps://repo.umb.sk/handle/123456789/1407
dc.language.isoen
dc.publisherAcademic Press : San Diego
dc.rightsCC BY Creative Commons Attribution 4.0. International
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjecthorčičník
dc.subjectErysimum
dc.subjectpolyploidia
dc.subjectpolyploídia
dc.subjectpolyploidy
dc.subjectspeciácia
dc.subjectspeciation
dc.titleUnderstanding early stages of speciation: Allopatric divergence, introgression and chromosomal dynamics in the Erysimum odoratum species complex
dc.typeArticle
dc.typeinfo:eu-repo/semantics/article

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