Importance sampling for Lambda-coalescents in the infinitely many sites model

Details Importance sampling for Lambda-coalescents in the infinitely many sites model Importance sampling for Lambda-coalescents in the infinitely many sites model

2011-05-10

arxiv.org/abs/1105.1836v1

Theor. Popul. Biol. 79(4), pp. 155-173 (2011)

Mathematics

Probability

(38 pages, 40 figures)

Scientific paper

10.1016/j.tpb.2011.01.005

We present and discuss new importance sampling schemes for the approximate computation of the sample probability of observed genetic types in the infinitely many sites model from population genetics. More specifically, we extend the 'classical framework', where genealogies are assumed to be governed by Kingman's coalescent, to the more general class of Lambda-coalescents and develop further Hobolth et. al.'s (2008) idea of deriving importance sampling schemes based on 'compressed genetrees'. The resulting schemes extend earlier work by Griffiths and Tavar\'e (1994), Stephens and Donnelly (2000), Birkner and Blath (2008) and Hobolth et. al. (2008). We conclude with a performance comparison of classical and new schemes for Beta- and Kingman coalescents.

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