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dc.contributor.authorMeudt, HMen_US
dc.contributor.authorAlbach, DCen_US
dc.contributor.authorTanentzap, AJen_US
dc.contributor.authorIgea, Jen_US
dc.contributor.authorNewmarch, SCen_US
dc.contributor.authorBrandt, AJen_US
dc.contributor.authorLee, WGen_US
dc.contributor.authorTate, JAen_US
dc.coverage.spatialSwitzerlanden_US
dc.date.available2021en_US
dc.date.available2021-02-11en_US
dc.date.issued2021en_US
dc.identifierhttps://www.ncbi.nlm.nih.gov/pubmed/33763097en_US
dc.identifier.citationFront Plant Sci, 2021, 12 pp. 637214 - ?en_US
dc.identifier.issn1664-462Xen_US
dc.descriptionPublished source must be acknowledged with citation Copyright must be acknowledged First publication by Frontiers Media must be acknowledgeden_US
dc.description.abstractWhole genome duplication or polyploidy is widespread among floras globally, but traditionally has been thought to have played a minor role in the evolution of island biodiversity, based on the low proportion of polyploid taxa present. We investigate five island systems (Juan Fernández, Galápagos, Canary Islands, Hawaiian Islands, and New Zealand) to test whether polyploidy (i) enhances or hinders diversification on islands and (ii) is an intrinsic feature of a lineage or an attribute that emerges in island environments. These island systems are diverse in their origins, geographic and latitudinal distributions, levels of plant species endemism (37% in the Galapagos to 88% in the Hawaiian Islands), and ploidy levels, and taken together are representative of islands more generally. We compiled data for vascular plants and summarized information for each genus on each island system, including the total number of species (native and endemic), generic endemicity, chromosome numbers, genome size, and ploidy levels. Dated phylogenies were used to infer lineage age, number of colonization events, and change in ploidy level relative to the non-island sister lineage. Using phylogenetic path analysis, we then tested how the diversification of endemic lineages varied with the direct and indirect effects of polyploidy (presence of polyploidy, time on island, polyploidization near colonization, colonizer pool size) and other lineage traits not associated with polyploidy (time on island, colonizer pool size, repeat colonization). Diploid and tetraploid were the most common ploidy levels across all islands, with the highest ploidy levels (>8x) recorded for the Canary Islands (12x) and New Zealand (20x). Overall, we found that endemic diversification of our focal island floras was shaped by polyploidy in many cases and certainly others still to be detected considering the lack of data in many lineages. Polyploid speciation on the islands was enhanced by a larger source of potential congeneric colonists and a change in ploidy level compared to overseas sister taxa.en_US
dc.format.extent637214 - ?en_US
dc.languageengen_US
dc.rightsThe Author(s) CC BY 4.0en_US
dc.subjectcolonizationen_US
dc.subjectdiversificationen_US
dc.subjectendemismen_US
dc.subjectisland florasen_US
dc.subjectphylogenetic path analysisen_US
dc.subjectploidy levelen_US
dc.subjectpolyploidyen_US
dc.subjectwhole genome duplicationen_US
dc.titlePolyploidy on Islands: Its Emergence and Importance for Diversification.en_US
dc.typeJournal Article
dc.citation.volume12en_US
dc.identifier.doi10.3389/fpls.2021.637214en_US
dc.identifier.elements-id441713
dc.relation.isPartOfFront Plant Scien_US
dc.description.publication-statusPublished onlineen_US
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Fundamental Sciences
dc.identifier.harvestedMassey_Dark
pubs.notesNot knownen_US
dc.subject.anzsrc0607 Plant Biologyen_US


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