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Sardinia is very heterogeneous. The most important dividing line, however, is the Sardinians of the Gennargentu massif, which is in western Ogliastra province and part of Nuoro province.
Chiang et al heavily sampled all regions and noted the differences. The villages on the massif range from 4%WHG to 18%. Steppe ranges from 0 to about 4%.
The particularly isolated and "unique" signature can be found in Arzana, Ilbono, Villagrande, then Gairo, Barisardo, Loceri, Lanusei.
Arzana is 9% Loschbour and 4% Yamnaya.
Ilbono is 4% Loschbour and 9% Yamnaya.
Villagrande is 14% Loschbour and 2% Yamnaya.
Gairo is 18% Loschbour and 0% Yamnaya.
Of course, these are averages. There is variation within the villages.
I'm sorry I can't upload the chart. I think they've blocked it. Anyway, it's in the supplement.
People of Gairo:
Most of them don't look very Italian to me, if anyone cares about my subjective opinion. If admixture correlates with "phenotype", too much WHG, too little steppe, and too little "Minoan".
Thanks for the info. It seems that some Sardinians have retained a considerable amount of WHG. Btw, would you say that Sardinians look on the whole rather homogenous or heterogonous, thus appearance-wise differ from region to region? There are not a few Sardinians who have a particular look. What I've noticed (at least when going by pictures that show them in traditional clothing) is that a fair amount of Sardinian women are easy on the eyes. Anyway, how can you, for example, tell a Sardinian from a typical Mainland Italian apart? Some Italians assert that there is a typical Neapolitan, Sicilian or Venetian look, etc. What do you think?