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dc.contributor.authorTusiime, Felly Mugizi
dc.contributor.authorGizaw, Abel
dc.contributor.authorGussarova, Galina
dc.contributor.authorNemomissa, Sileshi
dc.contributor.authorPopp, Magnus
dc.contributor.authorMasao, Catherine Aloyce
dc.contributor.authorWondimu, Tigist
dc.contributor.authorAbdi, Ahmed Abdikhadir
dc.contributor.authorMirre, Virginia
dc.contributor.authorMuwanika, Vincent
dc.contributor.authorEilu, Gerald
dc.contributor.authorBrochmann, Christian
dc.contributor.authorKiflemichael, Tigist Wondimu
dc.date.accessioned2021-01-22T08:30:35Z
dc.date.available2021-01-22T08:30:35Z
dc.date.issued2020-03-18
dc.description.abstractDistantly related lineages of the enigmatic giant rosette plants of tropical alpine environments provide classical examples of convergent adaptation. For the giant senecios (Dendrosenecio), the endemic landmarks of the East African sky islands, it has also been suggested that parallel adaptation has been important for within-lineage differentiation. To test this hypothesis and to address potential gene flow and hybridization among the isolated sky islands, we organized field expeditions to all major mountains. We sampled all currently accepted species and all but one subspecies and genotyped 460 plants representing 109 populations. We tested whether genetic structuring corresponds to geography, as predicted by a parallel adaptation hypothesis, or to altitudinal belt and habitat rather than mountains, as predicted by a hypothesis of a single origin of adaptations. Bayesian and Neighbor-Net analyses showed that the main genetic structure is shallow and largely corresponds to geography, supporting a hypothesis of recent, rapid radiation via parallel altitude/habitat adaptation on different mountains. We also found evidence for intermountain admixture, suggesting several long-distance dispersals by wind across vast areas of unsuitable habitat. The combination of parallel adaptation, secondary contact, and hybridization may explain the complex patterns of morphological variation and the contradicting taxonomic treatments of these rare enigmatic giants, supporting the use of wide taxonomic concepts. Notably, the within-population genetic diversity was very low and calls for increased conservation efforts.en_US
dc.identifier.citationTusiime FM, Gizaw AG, Gussarova G, Nemomissa S, Popp M, Masao C, Wondimu T, Abdi AA, Mirre V, Muwanika V, Eilu G, Brochmann C, Kiflemichael. Afro-alpine flagships revisited: Parallel adaptation, intermountain admixture and shallow genetic structuring in the giant senecios (Dendrosenecio). PLOS ONE. 2020
dc.identifier.cristinIDFRIDAID 1804863
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0228979
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/10037/20376
dc.language.isoengen_US
dc.publisherPublic Library of Scienceen_US
dc.relation.journalPLOS ONE
dc.relation.projectIDNorges forskningsråd: 274607
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titleAfro-alpine flagships revisited: Parallel adaptation, intermountain admixture and shallow genetic structuring in the giant senecios (Dendrosenecio)en_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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