A legitimate question would be: 'so why U152+' and not any of the other subclades or R1a or even a mixture of these elements?
Again, based on the very limited data available, and taking the couple of str-sequences I have managed to compare, there are no matches (not even one) with Italy and Switzerland. In fact, there are a few matches, all on 25markers, with Scotland (Edinburgh and surrounds). Another very unique characteristic of this U152+ is that it very often matches closely to L21 individuals in Wales. This suggests that these Greek U152+ haplotypes have an affinity with Scottish U152+ and Welsh L21 because they left central Europe for their respective destinations along the same period. The new Z-series of snps lower down from U152+ will begin shortly and I'm confident we will start to see snp similarities between Greek U152+ and Scottish U152+, and possibly also some Austro-Hungarian U152+.
well there is a significant R1a in central Greece connected also with sSouth Greece Locri and epizephyreian locri,
same analogy with sub-R1a we find in Aryan,
Greek language is Graeco-aryan connected to PIE and has same grammar with Avestan in past and future,
also the linguistic connection gives enough sansqrit,
so a posiibility of a central R1a
on the other hand Greek language follows ending of words and unique IE words with P- Celtic the gauls,
there words that we find only in those 2 languages,
so the posibility of Greco-Brygian (before mycenean Greek) gives many result,
remember that north thessaly west makedonia and east epirus has the biggest R1a spot in balkans,
the ancient capital of dorians was Trikke (trikala) at locri we also have R1a as also in their colonies of Locri,
remember that Doris city was Locri,
a possible ethogenesis in area of thessaly epirus south makedonia and phthia (Hellanas river) from Driopes Myceneans and Pelasgian is possible, that created the ancient Greek, after 920 BC
Greek-Vrygian language is connected with 3 major IE,
first grammatically with Avestan and Persian
second as vocabulary with Sansqrit
third as sounds, ending words etc with Gaulish and P-celtic
after these is the connection with slavic germanic and Q-Celtic