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Unformatted text preview: migration can be estimated from the following relation: Fst Å 1/(4N e m + 1 ). By rearranging the formula and plugging in trial values you can see that low values for m result in high values for Fst, and high values of m give low values of Fst. This follows from the homogenizing effect of gene flow on allele frequency variation among populations. The nature of population differentiation can depend on population structure . Typical scenarios include a Continent-Island model (gene flow from continent to island), an Island model (equal probability of gene flow among several/many populations), Stepping Stone model (gene flow is sequential among populations), Continuous Model (e.g., carpet of individuals). In all cases (except Island model) there can be Isolation by Distance simply reflecting incomplete homogenization of populations due to incomplete flow of genes among all populations....
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This note was uploaded on 11/05/2011 for the course BIOLOGY MCB2010 taught by Professor Jessicadigirolamo during the Fall '10 term at Broward College.
- Fall '10