inyerta
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The Midpoint Effect in G25 and PCA - Genetic Ancestry Analysis
When you look at a PCA plot and see Kazan Tatars sitting far below Russians on the East Asian axis, or Somalis clustering midway between Yoruba and…
Greek Islanders & Pontic Greeks (~0% – 8% Sintashta / Steppe): Aegean Islanders (Cretans, Dodecanese) and Pontic Greeks from the Black Sea coast retained ancient Mediterranean and Caucasian profiles with virtually no Steppe or Turkic influence.
Armenians (~5% – 12% Sintashta / Steppe): Modern Armenians derive overwhelmingly from pre-Bronze Age Caucasian Hunter-Gatherers, Anatolian farmers, and Iranian farmers. The Armenian genome effectively "isolated" around 1200 BCE (after the Bronze Age collapse), leaving them with low levels of Steppe MLBA admixture compared to neighboring groups.
Anatolian Turks (~25% – 35% Sintashta / Steppe): Medieval Turkic nomads (such as the Oghuz) were already an admixed population before entering Anatolia. They carried both East Asian/Siberian ancestry and Central Asian Steppe ancestry absorbed from earlier Indo-Iranian groups (like Scythians, Sakas, and Sogdians). This introduced a fresh wave of Sintashta-derived DNA into Anatolia.