A new model for extinction and recolonization in two dimensions: Quantifying phylogeography

N.H. Barton, J. Kelleher, A. Etheridge, Evolution 64 (2010) 2701–2715.

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Journal Article | Published | English
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Abstract
Classical models of gene flow fail in three ways: they cannot explain large-scale patterns; they predict much more genetic diversity than is observed; and they assume that loosely linked genetic loci evolve independently. We propose a new model that deals with these problems. Extinction events kill some fraction of individuals in a region. These are replaced by offspring from a small number of parents, drawn from the preexisting population. This model of evolution forwards in time corresponds to a backwards model, in which ancestral lineages jump to a new location if they are hit by an event, and may coalesce with other lineages that are hit by the same event. We derive an expression for the identity in allelic state, and show that, over scales much larger than the largest event, this converges to the classical value derived by Wright and Malécot. However, rare events that cover large areas cause low genetic diversity, large-scale patterns, and correlations in ancestry between unlinked loci.
Publishing Year
Date Published
2010-09-01
Journal Title
Evolution
Acknowledgement
This work has made use of the resources provided by the Edinburgh Compute and Data Facility (ECDF). The ECDF is partially supported by the eDIKT initiative. NHB is supported in part by EPSRC Grant EP/E066070/1; JK is supported by EPSRC Grant EP/E066070/1; and AME is supported in part by EPSRC Grant EP/E065945/1.
Volume
64
Issue
9
Page
2701 - 2715
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Barton NH, Kelleher J, Etheridge A. A new model for extinction and recolonization in two dimensions: Quantifying phylogeography. Evolution. 2010;64(9):2701-2715. doi:10.1111/j.1558-5646.2010.01019.x
Barton, N. H., Kelleher, J., & Etheridge, A. (2010). A new model for extinction and recolonization in two dimensions: Quantifying phylogeography. Evolution, 64(9), 2701–2715. https://doi.org/10.1111/j.1558-5646.2010.01019.x
Barton, Nicholas H, Jerome Kelleher, and Alison Etheridge. “A New Model for Extinction and Recolonization in Two Dimensions: Quantifying Phylogeography.” Evolution 64, no. 9 (2010): 2701–15. https://doi.org/10.1111/j.1558-5646.2010.01019.x.
N. H. Barton, J. Kelleher, and A. Etheridge, “A new model for extinction and recolonization in two dimensions: Quantifying phylogeography,” Evolution, vol. 64, no. 9, pp. 2701–2715, 2010.
Barton NH, Kelleher J, Etheridge A. 2010. A new model for extinction and recolonization in two dimensions: Quantifying phylogeography. Evolution. 64(9), 2701–2715.
Barton, Nicholas H., et al. “A New Model for Extinction and Recolonization in Two Dimensions: Quantifying Phylogeography.” Evolution, vol. 64, no. 9, Wiley-Blackwell, 2010, pp. 2701–15, doi:10.1111/j.1558-5646.2010.01019.x.

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