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

被引:42
作者
Vitalis, R
机构
[1] Univ Montpellier 2, Inst Sci Evolut Montpellier, CNRS UMR 5554, Lab Genet & Environm,CC 065, F-34095 Montpellier 05, France
[2] Stn Biol Tour Valat, F-13200 Arles, France
关键词
coalescence times; F-statistics; island model; population genetics; sex-biased dispersal;
D O I
10.1046/j.0962-1083.2001.01414.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
I derive the equilibrium values of sex-specific F-ST 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 F-ST 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 F-ST parameters evaluated after dispersal over F-ST 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 F-ST 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).
引用
收藏
页码:125 / 138
页数:14
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