Spatial principal component analysis points at global genetic structure in the Western Mediterranean.

Abstract excerpt

Many studies have tackled the existence of a genetic barrier in the Strait of Gibraltar between Iberian and North African populations, often with controversial conclusions. Here, we address this issue using a collection of Western Mediterranean populations and two dimensionality reduction methods: principal component analysis (PCA) and spatial PCA (sPCA). Our four different data sets consisted of (i) 16...

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