On Sat, Jan 4, 2025 at 01:19 PM, Belinda Dettmann wrote:
My main question is how the SNP CTS4099 came to be so widespread in recent times, with tests showing up in England and in Continental Europe. The second question is how much weight we can put on the Globetrekker Ancient Path dates. They look sensible to me but they do not align with the Ancient Connection results.
Belinda,
In Globetrekker the dates are inputs, not outputs, of the model. ?
And FTDNA's TMRCA estimates are pretty accurate, as a rule, so I think you can rely on them pretty heavily. ?Certainly much more so than TMRCA estimates from any other source.
I'd say the GlobeTrekker paths are notably less accurate, on average, than the dates are. ?Still good on average, of course, but I wish they would better visually represent the confidence intervals around the paths.
The ancient DNA samples must, by definition, be younger than the TMRCA of the haplogroup to which they belong. ?As long as they are younger, not older, I'd say the dates "align" as well as could be expected.
As for your main question I can only speculate. ?It looks to me like the fastest growth of the haplogroup was during the Roman era, but the growth certainly continued into the Anglo Saxon and Viking eras.
?
Vince
?
