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I think this is the guts of it, yes?
"A wide range of haplotypes, mostly belonging to western Eurasian haplogroups (97%), testify for the high mtDNA diversity in Umbria. The incidence of these lineages across the region is quite homogeneous with the notable exception of haplogroup K, reaching the highest frequency (17%) in South Umbria, and haplogroup J, which encompasses 30% of current inhabitants of the eastern area. In the western Eurasian PCA plot, the latter sub-region is pushed close to populations from central-eastern Europe by haplogroups U4 and U5a that show high frequencies in those areas.Then, we extended our analyses to complete mitogenomes (191 sequenced for the first time), randomly selecting the targeted samples to avoid phylogenetic biases and to maintain the population-wide characteristics of our dataset. This higher level of resolution allowed us to refine the haplogroup affiliation in more than 70% of the samples and to make a diachronic comparison with 19 ancient mitogenomes from Umbri Plestini. These pre-Roman samples were classified into the same haplogroups identified in contemporary inhabitants. Moreover, the six terminal branches (H1e1, J1c3, J2b1, U2e2a, U8b1b1 and K1a4a) shared between ancient and modern mitogenomes suggest a genetic continuity in the region during the Holocene. These specific lineages were also identified in a wide range of available ancient samples outside the region, including Neolithic Mediterranean remains as well as Yamnaya, Bell Beaker and more recent samples from central-eastern Europe. These variegated connections are summarized by the lineage geographic/temporal patterns and are specifically shown by the J1c3g ancient mtDNA tree dated between the Late Neolithic and the Early Bronze Age."
Don't see all those exotic mtDna lineages from all those impregnated slave girls from non-European areas. If they were impregnated and their children weren't killed, they had mtDna signatures remarkably similar to those of the locals.
All in all, it seems like continuity to me. Nice to see my mtDna show up. There's a chart which shows where they've found ancient samples. I wonder if it's Urnfield in origin?
The other interesting thing to me is how attached Italians have been until recent times to their own spot of land, partly accounting for the variation. The Tiber dividing western from eastern Umbria has created enough of a barrier that the eastern Umbrians have a somewhat different mtDna pattern, retaining more of the "U" lineages, and also having a slightly different "language". I think that may also be partly explained by Umbria's location. It is landlocked, with the southern region bordering Lazio and the east bordering southern Toscana, leading to some admixture of lineages I'm sure. The east is somewhat isolated, being bordered by the Marche and getting no admixture from the sea, and separated even from the Marche by the Central Apennines.
There's some correlation with the situation with the Etruscans. The ancient Etruscans also had a lot of mtDna U, placing their mtDna signature closest to that of current southern Germans. That wasn't enough for the ideologues. Despite all the archaeological evidence, they still insisted that they came from Anatolia in the first millennium B.C.
Non si fa il proprio dovere perchè qualcuno ci dica grazie, lo si fa per principio, per se stessi, per la propria dignità. Oriana Fallaci