GESTE (GEnetic STructure inference based on genetic and Environmental data) is a Bayesian method to evaluate the effect that biotic and abiotic environmental factors (geographic distance, language, temperature, altitude, local population sizes, etc.) have on the genetic structure of populations. It can also be used to study spatial population processes, such as range expansions, by simply introducing longitude and latitude as the explanatory variables.
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Foll, M., and O.E. Gaggiotti, 2006.
Identifying the environmental factors that determine the genetic structure of Populations.
Genetics 174: 875-891.