The movement eastwards of LBA Sicilians from EBA Sicilians in Western Sicily is attributed to Mycenaeans even though there is no archeological Mycenaean-like work in Western Sicily. In fact there are better explanations related with Sardinian movement in EBA. And nearly every single Middle Easterner in Italy
(especially in Southern Italy) is automatically assumed to be "hellenized". There are also the leaked Italics that were
automatically assumed to be Greek-shifted without assuming regional differences (which should come FIRST in mind). Good thing we got the Daunian paper before the Etruscans because we all know what would happened. I think that the impact of the Greeks was great but this is being blown out of proportion.
The ratio of Apulians and Daunians seems
similar to the ratio of Etruscans and Tuscans to me. There is a genetic cline in Italy not a drastic genetic break (that should've have happened if the Greeks replaced the bulk of the population like it happened in Croatia with the Slavs and it that case Croatia diverges from Northern Italians) and also haplogroups like J1, E and J2 (combined) are not drastically greater in the South (with
exceptions in Eastern Sicily and Calabria) than they are in many central regions and even regions like Emilia-Romagna. Again the South probably carried more J2 before any Iron Age colonization.
https://www.eupedia.com/genetics/italian_dna.shtml
To me it seems that this Imperial Roman ancestry has affected the Italian provinces largely the same in antiquity forming a genetic cline. And this cline used to exist in antiquity as well as we have seen with Daunians and Etruscans, that is main cause of the diverge between modern Italians. If we add a certain percentage (don't know how much) of Imperial Roman ancestry of the same amount into both Daunians and Etruscans we get 2 different genetic clusters. Let's call them A and B. "A" is Etruscan mixed with Imperial Roman and "B" is Daunian mixed with Imperial Romans. The distance of "A" to Tuscans is quite similar to the distance of "B" to Apulians. (I assume)
Also Tuscany has received
more Northern European related ancestry (after Imperial Roman times which could've reduced certain Y-DNA line) from different sources while Apulia has received more southern ancestry like Greek (25% at
most IMHO,
before Imperial Rome), 1% to 3% Moorish (probably mostly male-biased) etc creating even a greater divergence into what is
now Apulia and Tuscany.
That is in my opinion how modern genetic body of Italians was formed. Not because Greeks replace most of the population.
Ancient Greek cities were formed from 500B.C to 800B.C, there is lot's of Greek impact in Southern Italy but I am gonna be straight to the point that I think what happened to Tuscany probably happened to Southern Italy too. That is my opinion, also formulated by historical research. I may be wrong but I am not biased.
As for the Athenian sample who plots close to Cyprus it could be full-blooded Anatolian, unless it was mixed with
very eastern Armenian-like, that would make him half-half. There is a quote from a Roman historian from the first century AD saying the old Athenians have gone extinct and he called the curret inhabitants of that time a racist word. If Athenian sample is a good representative of pre-Slavic Peloponnese, you would need some 30% Polish-like to model modern Peloponnesians and you would be left with a minority of overall actual Mycenaean ancestry (and probably Classical Greek since they always cluster with Mycenaeans) in modern Peloponnesians which was assumed to be above 70% several years ago. Especially if the Slavs turn out to be mixed. (there is a good chance that they were.)
I have told some of the members that were trying to inflate the Albanian influx in Peloponnese, that Albanian-speakers in Peloponnese in 19th century were no more than 15%. Just saying.