As I've been comparing mytrueancestry results with Iberians, I thought I might post some of the results here for whatever insights they might provide.
Here are the samples. The first genetic "fit" is Carlos', the second is mine, and the third one is for Jovialis. The smaller the number the better the fit. I also have Duarte's and Stuvane's figures. Duarte gets numbers close to those of Carlos but a little bit worse in terms of fit, and Stuvane gets numbers similar to mine, with fits also a bit larger. Both have posted their results so you can easily look them up in the mytrueancestry thread. It's just getting very tedious looking all these numbers up, as well as being time consuming.
Imperial Period:
6. Roman Iberia Granada (300 AD) (16.5) - I3982 Angela (15.42)
51. Roman Iberia Granada (350 AD) (22.96) - I3983 Angela (15.18) Jovialis (20.78)
Early Medieval:
40. Late Roman Iberia Granada (470 AD) (21.55) - I3575 Angela (13.51) Jovialis (17.51)
Early Medieval Iberia Granada (500 AD) (17.63) - I3981 Angela (11.99) Jovialis (23.83)
45. Late Roman Iberia Granada (500 AD) (22.0) - I3581 Angela (14.39) Jovialis (22.58)
EarlyMedieval Iberian (670 AD) (14.53) - CL23 Angela: (9.671) Jovialis (24.17)
I would be cautious about this. It comes from Collegno and I'm doubtful about the labeling by mytrueancestry.
Early Medieval Iberia Granada (760 AD) (13.51) - I3585 Angela(15.1)
Medieval Iberian Valencia (1100 AD) (15.42) - I2515 Angela (10.29 Jovialis (24.77)
Later Medieval Iberia:
19. Medieval Iberian Valencia (1120 AD) (16.75) - I2514 Angela 11.87 Jovialis (26.5)
Medieval Iberian Valencia (1200 AD) (14.63) - I2649 Angela(15.54)Jovialis(27.14)
17. Medieval Iberian Valencia (1200 AD) (16.53) - I2644 Angela 15.06 Jovialis (27.54)
30. Medieval Iberian Valencia (1200 AD) (19.83) - I2647 Angela (15.84) Jovialis (24.22)
Carlos doesn't seem to get results in the top 60 for these, which seems strange. Well, there are samples in the top 60 which aren't in ours.
22. Late Roman Iberia Granada (500 AD) (14.83) -
I3582 Jovialis (24.54)
26. Late Roman Iberia Granada (470 AD) (15.17) -
I3576 Jovialis (22.49)
36. Early Medieval Iberia Granada (515 AD) (18.88) -
I3980 Jovialis (20.48)
In one case Carlos gets a better fit than I do. In the rest mine are closer, in a few cases by not very much, and in the rest by a lot. The fits for Jovialis are sometimes in between mine and those of Carlos, and in some cases they're the most distant.
In other samples, like the Bell Beakers of France, central Europe etc., his scores are either better than mine and those of Jovialis or they don't even show up for us.
Yet, on these samples we have some similarities.
So, is it really ancient similarity, ie. Anatolian farmer like ancestry? We both have a lot of it. Is it also a signal that there is indeed Roman Era ancestry going into Iberia from the Italian peninsula, as the paper maintains? Yes, I think so, and Greek as well. I think it was most prominent in the east and south going by the settlement patterns, but we'd need more results from more Iberians and Italians.
Did that "Roman" ancestry come from northern, central or southern Italy? I don't think there's any way to even get a hint from results like this. There could have been southerners who admixed over time.
You would need to do some analyses to see if they were newcomers to the area or were at least local from birth, as was done in the Langobard paper.
I don't know how universal these results are...I'm from Emilia and Eastern Liguria/Lunigiana. Stuvane is from the Romagna, and his fits are usually a little less close than mine but very similar, even the order is almost the same. However, there might be more northern Italians who get worse fits, or better ones for that matter.