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The probability of reciprocal monophyly of gene lineages in three and four species

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  • Mehta, Rohan S.
  • Rosenberg, Noah A.

Abstract

Reciprocal monophyly, a feature of a genealogy in which multiple groups of descendant lineages each consist of all of the descendants of their respective most recent common ancestors, has been an important concept in studies of species delimitation, phylogeography, population history reconstruction, systematics, and conservation. Computations involving the probability that reciprocal monophyly is observed in a genealogy have played a key role in criteria for defining taxonomic groups and inferring divergence times. The probability of reciprocal monophyly under a coalescent model of population divergence has been studied in detail for groups of gene lineages for pairs of species. Here, we extend this computation to generate corresponding probabilities for sets of gene lineages from three and four species. We study the effects of model parameters on the probability of reciprocal monophyly, finding that it is driven primarily by species tree height, with lesser but still substantial influences of internal branch lengths and sample sizes. We also provide an example application of our results to data from maize and teosinte.

Suggested Citation

  • Mehta, Rohan S. & Rosenberg, Noah A., 2019. "The probability of reciprocal monophyly of gene lineages in three and four species," Theoretical Population Biology, Elsevier, vol. 129(C), pages 133-147.
  • Handle: RePEc:eee:thpobi:v:129:y:2019:i:c:p:133-147
    DOI: 10.1016/j.tpb.2018.04.004
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    Cited by:

    1. Di Nunzio, Antonio & Disanto, Filippo, 2024. "Clade size distribution under neutral evolutionary models," Theoretical Population Biology, Elsevier, vol. 156(C), pages 93-102.

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