PCA vs. Map of Polish regions

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I collected Polish and neighbouring regional samples that I found (samples assigned to regions mostly based on genealogical info) and added some academic samples (Mazovia2 = seven samples from Warsaw from Behar 2013 study). I created a PCA. Then I superimposed this PCA with regional Polish and neighbouring (including East German) averages on a map.

Map1: https://i.imgur.com/Xx4lrBX.png



And after adding Lithuanian average to the PCA:

Map2: https://i.imgur.com/Vwk3mLW.png



Red Ruthenia are Poles from Lubelskie, and Polish Mountains are Poles from Podkarpacie.

These are the regions I suggested to Living DNA:

http://www.anthrogenica.com/showthre...l=1#post302839

Compare to my suggested division into regions:

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Sample sizes for Polish and German averages:

Neumark & Posen-Westpreussen - 17
Sachsen - 14 (including 8 from Leipzig)
Pommern and Vorpommern - 8
Sachsen-Anhalt - 2
Mecklenburg - 7
Brandenburg - 15

Greater Poland - 24 (including 15 from Poznan)
Upper Silesia - 18
Lusatian Sorbs - 8
Pomerelia (among them Kashubians) - 12
Podlachia (Podlasie) - 26
Podkarpacie (eastern Polish Mountains) - 15

Sudovia (Suwałki Region) - 3

Mazovia1 - 31 Mazovians from various areas
Mazovia2 - 7 Warsaw samples from Behar 2013

SE-Kresy (Poles from Western Ukraine) - 10
Red Ruthenia, or Lubelskie - 8 (5 from Lublin)
Northern Poland (Kujawsko-Pomorskie) - 11
NE-Kresy (Poles from Vilno-Grodno Regions) - 2

Czechs - 33 samples

I forgot to add Estonian Poles from Kushniarevich 2015.

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^^^
Vinnytsia, Poltava, Kharkiv, Chernigov, Boryslav and Zboriv are of course ethnic Ukrainians.

Polesye, Grodno, Vitebsk and Mogilev are Belarusians. Zakarpattia are Carpathian Rusyns.

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See also: http://www.anthrogenica.com/showthre...tic-comparison