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Population differentiation and migration: Coalescence times in a two-sex island model for autosomal and X-linked loci

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  • Ramachandran, Sohini
  • Rosenberg, Noah A.
  • Feldman, Marcus W.
  • Wakeley, John

Abstract

Evolutionists have debated whether population-genetic parameters, such as effective population size and migration rate, differ between males and females. In humans, most analyses of this problem have focused on the Y chromosome and the mitochondrial genome, while the X chromosome has largely been omitted from the discussion. Past studies have compared FST values for the Y chromosome and mitochondrion under a model with migration rates that differ between the sexes but with equal male and female population sizes. In this study we investigate rates of coalescence for X-linked and autosomal lineages in an island model with different population sizes and migration rates for males and females, obtaining the mean time to coalescence for pairs of lineages from the same deme and for pairs of lineages from different demes. We apply our results to microsatellite data from the Human Genome Diversity Panel, and we examine the male and female migration rates implied by observed FST values.

Suggested Citation

  • Ramachandran, Sohini & Rosenberg, Noah A. & Feldman, Marcus W. & Wakeley, John, 2008. "Population differentiation and migration: Coalescence times in a two-sex island model for autosomal and X-linked loci," Theoretical Population Biology, Elsevier, vol. 74(4), pages 291-301.
    • Handle: RePEc:eee:thpobi:v:74:y:2008:i:4:p:291-301
    DOI: 10.1016/j.tpb.2008.08.003
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    References listed on IDEAS

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    1. Noah A Rosenberg & Saurabh Mahajan & Sohini Ramachandran & Chengfeng Zhao & Jonathan K Pritchard & Marcus W Feldman, 2005. "Clines, Clusters, and the Effect of Study Design on the Inference of Human Population Structure," PLOS Genetics, Public Library of Science, vol. 1(6), pages 1-12, December.
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    Cited by:

    1. Van Cleve, Jeremy, 2015. "Social evolution and genetic interactions in the short and long term," Theoretical Population Biology, Elsevier, vol. 103(C), pages 2-26.
    2. Cotter, Daniel J. & Severson, Alissa L. & Carmi, Shai & Rosenberg, Noah A., 2022. "Limiting distribution of X-chromosomal coalescence times under first-cousin consanguineous mating," Theoretical Population Biology, Elsevier, vol. 147(C), pages 1-15.
    3. Cotter, Daniel J. & Severson, Alissa L. & Rosenberg, Noah A., 2021. "The effect of consanguinity on coalescence times on the X chromosome," Theoretical Population Biology, Elsevier, vol. 140(C), pages 32-43.
    4. Severson, Alissa L. & Carmi, Shai & Rosenberg, Noah A., 2021. "Variance and limiting distribution of coalescence times in a diploid model of a consanguineous population," Theoretical Population Biology, Elsevier, vol. 139(C), pages 50-65.
    5. Mendez, Fernando L., 2017. "Differences in the effective population sizes of males and females do not require differences in their distribution of offspring number," Theoretical Population Biology, Elsevier, vol. 114(C), pages 19-28.

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