General theory for stochastic admixture graphs and F-statistics

Samuele Soraggi and Carsten Wiuf

Theoretical Population Biology, 2019, vol. 125, issue C, 56-66

Abstract: We provide a general mathematical framework based on the theory of graphical models to study admixture graphs. Admixture graphs are used to describe the ancestral relationships between past and present populations, allowing for population merges and migration events, by means of gene flow. We give various mathematical properties of admixture graphs with particular focus on properties of the so-called F-statistics. Also the Wright–Fisher model is studied and a general expression for the loss of heterozygosity is derived.

Keywords: Introgression; Genetic drift; Wright–Fisher model; Heterozygosity; F-statistic; Markov graphical model (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:eee:thpobi:v:125:y:2019:i:c:p:56-66

DOI: 10.1016/j.tpb.2018.12.002

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