What % of British/Irish DNA comes from their pre-celtic population?

[Rietto66]

I heard that pre-celtic Britain used to be inhabited by a sardinian-like population. How much of their DNA comes from these people?

[JamesBond007]

Sardinian implies small med rather than atlanto-med which is not correct per se as the Romanized teviec strain played a secondary role. It is doesn't make sense to try to seperate it from Celtic leavening in the British context
So, if you did not have an agenda the question would be how French-like or Welsh-like are the English etc..?:

Me :

Target: Kevin_scaled
Distance: 2.0805% / 0.02080509
64.0 England_Saxon
34.0 England_Roman
2.0 SWE_Viking_Age_Sigtuna


English average :

Target: English
Distance: 0.8827% / 0.00882711
44.4 England_Roman
30.6 England_Saxon
25.0 SWE_Viking_Age_Sigtuna

[J. Ketch]

I heard that pre-celtic Britain used to be inhabited by a sardinian-like population. How much of their DNA comes from these people?
Less than 5%.

[TheOldNorth]

Around ~10% if you mean Mesolithic hunter gatherer, 70-80% for non-English brits if you mean the indo-european Bell-Beakers

[J. Ketch]

Around ~10% if you mean Mesolithic hunter gatherer, 70-80% for non-English brits if you mean the indo-european Bell-Beakers
He said Sardinian-like people, so he's obviously referring to the Neolithic population, and the Mesolithic British inheritance is tiny, it may not even be 1%.

[TheOldNorth]

He said Sardinian-like people, so he's obviously referring to the Neolithic population, and the Mesolithic British inheritance is tiny, it may not even be 1%.

most estimates put it firmly between 5-10% rarely less or more

[J. Ketch]

most estimates put it firmly between 5-10% rarely less or more
Explain how. Beakers 93% replaced the Neolithic British, and the Neolithic British were 1/4 WHG, of which only part would have come from Mesolithic British, as they already had WHG admix before they invaded.

[TheOldNorth]

Explain how. Beakers 93% replaced the Neolithic British, and the Neolithic British were 1/4 WHG, of which only part would have come from Mesolithic British, as they already had WHG admix before they invaded.

I misunderstood the question, I thought we were talking about the neolithic megalith buliders, not the british WHGs, even if I for whatever reason mentioned them, I'm rather tired at the moment

[Rietto66]

Less than 5%.

Really that low? I've heard some people claim that it is around 10-20%, but I don't really know who is correct tbh.

[J. Ketch]

Really that low? I've heard some people claim that it is around 10-20%, but I don't really know who is correct tbh.
Yes, that low. The Neolithic genepool of Britain was over 90% replaced by Bell Beakers within a few centuries, and then over the past 4000 years we've had invasions from Celts, Romans, Anglo-Saxons, Vikings, Normans and other migration that has decreased the Neolithic British inheritance further.

https://www.nature.com/articles/nature25738

[Davystayn]

Probably up 10% in western areas like Wales,

[Grace O'Malley]

Probably up 10% in western areas like Wales,

"Insular Celtic" areas have more ANE than the English and less Neolithic so I doubt Wales would have that. Most of the Farmer ancestry present day British and Irish have came from the Beakers and not the original farmer population which was already small by the time the Beakers arrived.

[Token]

Less than 10% for sure.

[Rædwald]

Probably 1-5% if that.

[Petalpusher]

The brits are at least 35% basal, what you refer as farmer's ancestry was also in Beakers via CHG and Iran_N like admixture. Once all these farmer like and Beakers ancestries are stripped out of their paleo-meso elements (WHG-ANE and SHG-EHG intermediates), there is still a lot of Basal in there (old Caucasian in a sense). So not quite like Sardinian exactly, but it's the best proxy we have in Europe at least.

The Ballpark is 50% WHG, 35% Basal, 15% ANE proper.