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    Polyploid Formation Shapes Flowering Plant Diversity

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    PolyploidFormation.pdf (805.0Kb)
    Date
    2014-10
    Author
    Scarpino, Samuel V.
    Levin, Donald A.
    Meyers, Lauren A.
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    Abstract
    Polyploidy, or whole genome duplication, has been an important feature of eukaryotic evolution. This is especially true in flowering plants, where all extant angiosperms have descended from polyploid species. Here we present a broad comparative analysis of the effect of polyploidy on flowering plant diversity. We examine the widely held hypothesis that polyploid flowering plants generate more diversity than their diploid counterparts, by fitting stochastic birth/death models to observed ploidal frequency data from 60 extant angiosperm genera. Our results suggest the opposite, that diploids speciate at higher rates than polyploids, through a combination of simple diploid speciation and tetraploidy. Importantly, the estimated diploid advantage stemmed primarily from a higher rate of polyploidization in diploids than polyploids. Our model is also able to account for the empirically observed correlation between polyploidy and species richness without assuming that polyploids have a speciation advantage over diploids.
    Department
    Integrative Biology
    Subject
    polyploidy
    angiosperms
    ratchet model
    speciation rates
    approximate
    bayesian computation
    mechanisms
    genome
    consequences
    angiosperms
    evolution
    diversification
    metaanalysis
    population
    extinction
    pathways
    ecology
    evolutionary biology
    URI
    http://hdl.handle.net/2152/31174
    xmlui.dri2xhtml.METS-1.0.item-citation
    Samuel V. Scarpino, Donald A. Levin, Lauren Ancel Meyers. Polyploid Formation Shapes Flowering Plant Diversity. The American Naturalist, Vol. 184, No. 4 (Oct. 2014), pp. 456-465. DOI: 10.1086/677752
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    University of Texas at Austin Libraries
    • facebook
    • twitter
    • instagram
    • youtube
    • CONTACT US
    • MAPS & DIRECTIONS
    • JOB OPPORTUNITIES
    • UT Austin Home
    • Emergency Information
    • Site Policies
    • Web Accessibility Policy
    • Web Privacy Policy
    • Adobe Reader
    Subscribe to our NewsletterGive to the Libraries

    © The University of Texas at Austin