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Article Dans Une Revue Molecular Ecology Année : 2002

Sex-specific genetic differentiation and coalescence times: estimating sex-biased dispersal rates

Résumé

I derive the equilibrium values of sex-specific FST parameters, in an island model for a dioecious species with sex-biased dispersal and binomial distribution of family size before dispersal (as assumed in a Wright–Fisher population). I show that FST may take different values among males and among females whenever dispersal is a trait conditioned on gender. This has not always been recognized, because some models assumed that genes are sampled before dispersal. In particular, the ratios of sex-specific FST parameters evaluated after dispersal over FST evaluated before dispersal are simple functions of sex-specific dispersal rates. Therefore, a simple moment-based estimator of sex-specific dispersal rate is proposed. This method is based on the comparison of FST estimated before and after dispersal and assumes equilibrium between migration and drift. I evaluate this method through stochastic simulations for a range of sex-specific dispersal rates and sampling effort (sample size, number of loci scored).

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Dates et versions

halsde-00341007 , version 1 (24-11-2008)

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Renaud Vitalis. Sex-specific genetic differentiation and coalescence times: estimating sex-biased dispersal rates. Molecular Ecology, 2002, 11 (1), pp.125 - 138. ⟨10.1046/j.0962-1083.2001.01414.x⟩. ⟨halsde-00341007⟩
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