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Sex‐specific genetic differentiation and coalescence times: estimating sex‐biased dispersal rates
Author(s) -
Vitalis Renaud
Publication year - 2002
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1046/j.0962-1083.2001.01414.x
Subject(s) - biology , biological dispersal , evolutionary biology , coalescence (physics) , sexual differentiation , ecology , genetics , demography , population , gene , sociology , astrobiology
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).