UBC Research Data

Data from: Recently-formed polyploid plants diversify at lower rates Mayrose, Itay; Zhan, Shing H.; Rothfels, Carl J.; Magnuson-Ford, Karen; Barker, Michael S.; Rieseberg, Loren H.; Otto, Sarah P.


Polyploidy, the doubling of genomic content, is a widespread feature, especially among plants, yet its macro-evolutionary impacts are contentious. Traditionally, polyploidy has been considered an evolutionary dead-end, whereas recent genomic studies suggest that polyploidy has been a key driver of macro-evolutionary success. Here we examine the consequences of polyploidy on the time scale of genera across a diverse set of vascular plants, encompassing hundreds of inferred polyploidization events. Likelihood-based analyses indicate that polyploids generally exhibit lower speciation rates and higher extinction rates than diploids, providing the first quantitative corroboration of the dead-end hypothesis. The increased speciation rates of diploids can, in part, be ascribed to their capacity to speciate via polyploidy. Only particularly “fit” lineages of polyploids may persist to enjoy longer term evolutionary success.; Usage notes
polyploidy_databaseThe database include 63 plant phylogenies in which ploidy variation is present. Most phylogenies are at the genus or subgenus level. Each folder contains five files: the phylogeny and associated data.

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