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Y-DNA forms a very small percentage of overall DNA but they can provide good information about population movements. Simply take the R1b in Estrucans and Tuscans which clearly contradicts the hypothesis of Herodotus of Estrucans being of Anatolian stock. Simple take Albanians and Tuscans who are very close to each, this doesn't mean that we are historically related which is well confirmed by their Y DNA. Subclades are important too, the R1b in Basques, Irish and Northern Italians are not very similar.
The genetic relationship tof Peloponessians with Abruzzes is not something ''recent'' but deep which is cause by northern allelles brought mostly during the Middle Ages, since Peloponnesians were much closer to Sicilians in the early Middle ages and due to significant northern allelles they plot north of Abruzzes and south of Albania. Even though if would be great to know the impact of Latin colonists in Peloponnese after Romans colonised Corinth.
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