Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
polytomy .
Etymologies
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Examples
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The resolutions of the polytomies of the MP tree are only very weakly supported.
PLoS ONE Alerts: New Articles Hubert Turner et al. 2010
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Adams consensus trees retain the undisputed skeleton of the basal trees; the taxa on which no agreement is reached are placed in polytomies at the base of the clades to which they belong.
PLoS ONE Alerts: New Articles Hubert Turner et al. 2010
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Mapping the host-plant data shows, despite the polytomies still present in
PLoS ONE Alerts: New Articles Hubert Turner et al. 2010
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When possible, future investigations into the phylogenetic dispersion of communities using phylogenies containing polytomies should generate a distribution of possible results by randomly resolving the polytomies in the phylogeny
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The comparative biology literature on this topic is deeper, focusing on developing methods to deal with soft polytomies by representing the branch lengths between the lineages derived from a polytomous node as a zero
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For those that have used large phylogenetic supertrees with multiple soft polytomies in the past
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A graphical example how potential directional biases in phylogenetic dispersion produced by using phylogenetic trees containing polytomies were quantified in this study.
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Interestingly, the phylogenetic diversities recorded using phylogenies with polytomies were generally highly correlated with the phylogenetic diversity found for the same communities using a fully bifurcating phylogeny.
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The random assemblages generated in the null models were generated by drawing the same number of species from the pool as the number of species in the observed community and observed community occupancy rates were fixed, also known as an Independent Swap Two methods were used to introduce soft polytomies into the original fully bifurcating phylogenetic tress.
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In this study I asked how does the use of a phylogeny with multiple polytomies bias commonly used metrics of phylogenetic diversity and dispersion.
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