What I find highly interesting is the significant percentages of R1a-M17 in Apulia, Calabria Ionica, and especially Grecia Salentina, and the paucity of J1 even in the south.
For those who may have forgotten, the Valle Borbera is listed as Piemonte, but that's an accident of recent map drawing politics; the villages all speak a Ligurian dialect and even the names of the villages contain the word "Ligure". So, those are isolated Ligurians, who, as you can see, are very high in R1b, especially U-152, but also have 12.9% of G2a-497, and barely any E-V13. That, to me, and contrary to some of the speculation introduced to this board, speaks to a maritime spread of E-V13 in the Ligurians.
As for Tortona/Vorghera, they're in a no man's land between Lombardia, Piemonte and Emilia.
As I've expounded upon before, these mountain communities of the Appennines are pretty similar in genetic make-up, I think, as they are in culture. Cavalli Sforza speculated these were the refugial areas of the Celt-Ligurians. I wish they could be tested against ancient samples from there, if we ever get some, before all the older people with all four grandparents from the area are dead.
Valle Borbera: lots of burly, rather portly men with big, broad, round skulls for the most part, as there are in the Appennines of Emilia.
STEFANO VALLA e MATTEO BURRONE "" Monferrina "" - YouTube
CORO SPONTANEO "" Bella Angiolina "" - YouTube