Iberian Y-chromosomes

August 5, 2004

Reduced genetic structure of the Iberian peninsula revealed by Y-chromosome analysis: implications for population demography


Flores et al. (2004)
European Journal of Human Genetics

[...]

Coincidentally, spatial analysis of genetic distances points to a focal distribution of Y-chromosome haplogroups in this area. These results indicate that neither old or recent Levantine expansions nor North African contacts have influenced the current Iberian Y-chromosome diversity so that geographical patterns can be identified.

[...]

The Y-chromosome variation landscape in Iberia was also evaluated using principal component analysis, which included samples with highly resolved Y-chromosome data from Europe...Near East...and Northwest Africa.... The first two components of the analysis accounted for 83.9% of genetic variance, and produced three well-separated clusters of populations, evidencing the sharp differences between the Y-chromosome pool of Western Europe, Near East and Northwest Africa (Figure 4).


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