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 Spatially explicit analysis reveals complex human genetic gradients in the Iberian Peninsula

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Spatially explicit analysis reveals complex human genetic gradients in the Iberian Peninsula Empty
PostSubject: Spatially explicit analysis reveals complex human genetic gradients in the Iberian Peninsula   Spatially explicit analysis reveals complex human genetic gradients in the Iberian Peninsula I_icon_minitimeWed Jun 19, 2019 4:41 pm

https://www.nature.com/articles/s41598-019-44121-6

Article | Open | Published: 24 May 2019

Spatially explicit analysis reveals complex human genetic gradients in the Iberian Peninsula

João Pimenta, Alexandra M. Lopes, Angel Carracedo, Miguel Arenas, António Amorim & David Comas

Scientific Reports 9, Article number: 7825 (2019) | Download Citation

Abstract

The Iberian Peninsula is a well-delimited geographic region with a rich and complex human history. However, the causes of its genetic structure and past migratory dynamics are not yet fully understood. In order to shed light on them, here we evaluated the gene flow and genetic structure throughout the Iberian Peninsula with spatially explicit modelling applied to a georeferenced genetic dataset composed of genome-wide SNPs from 746 individuals belonging to 17 different regions of the Peninsula. We found contrasting patterns of genetic structure throughout Iberia. In particular, we identified strong patterns of genetic differentiation caused by relevant barriers to gene flow in northern regions and, on the other hand, a large genetic similarity in central and southern regions. In addition, our results showed a preferential north to south migratory dynamics and suggest a sex-biased dispersal in Mediterranean and southern regions. The estimated genetic patterns did not fit with the geographical relief of the Iberian landscape and they rather seem to follow political and linguistic territorial boundaries.
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