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Molecular substitution rate increases with latitude in butterflies : evidence for a trans-glacial latitudinal layering of populations ? [Ecography]

par Frédéric Magné - publié le , mis à jour le

A well-documented consequence of repeated global ice ages is the negative relationship between latitude and intraspecific genetic diversity. However, little is known about additional effects of such major climatic events on population genetic structure. Here we studied the phylogeographic structure of five lycaenid butterfly species with varied ecological adaptations, sampled across a latitudinal gradient in the Holarctic region. We found a positive correlation between latitude and substitution rate of mitochondrial DNA sequences in all species investigated.(...)

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