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Geographic homogeneity and non-equilibrium patterns of mtDNA sequences in Tuscany, Italy

By G. Bertorelle, F. Calafell, P. Francalacci, J. Bertranpetit and G. Barbujani

Abstract

The geographical distribution of 49 mtDNA sequences from 22 localities in Southern Tuscany, Italy, was studied by molecular analysis of variance, by a new spatial autocorrelation statistic specifically designed for sequence data and by reconstructing genealogies of haplotypes. All these methods indicated a high homogeneity of populations. Nevertheless, genetic variability showed significant departure from equilibrium expectations, in agreement with the predicted effects of a population expansion. We suggest that a past population expansion that was probably associated with a migrational wave and with local gene flow between localities prevented spatial structuring in Southern Tuscany

Year: 1996
OAI identifier: oai:iris.unife.it:11392/518618
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