Beaker phenomenon and the genomic transformation of northwest Europe

Already you can see the genetic cline north-south Italy. Anyway the Sicilian BBs plot close of modern-day Sicilians kinda like Myceneans.
Do you think the Parma sample (I2478) is close to modern North Italians or even Tuscans?
 
Do you think the Parma sample (I2478) is close to modern North Italians or even Tuscans?

Hopefully, Hauteville will respond, but in the meantime you can look at posts 5 and 6 on this thread. There are three Bell Beaker samples from Parma. One is still very Sardinian like, i.e. late Neolithic, early Chalcolithic like, and plots there.

I always have difficulty when the modern populations aren't labeled, but it seems to me that one plots among Spaniards, and one sort of in no man's land by itself, so, close to Northern Italians, perhaps, but needing both more Yamnaya and more CHG?
 
replacement of approximately 90% of Britain’s gene pool

I think 90% is exaggerated because Bronze Age individuals with just 10% Neolithic British do NOT cluster with modern British. The ones that cluster with modern British are those who had ca. 20% Neolithic British. Also, average levels of Neolithic British in the population continued to increase after the initial invasion. It probably stabilized at +/- 20% in the Iron Age. Or, alternatively, there could be some new immigration from the continent that increased EEF admixture.

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It is interesting to compare individual Bronze Age samples with different levels of Neolithic British DNA.

We can do this using for example GEDmatch or Global25. Below, I'm showing comparisons with use of G25.

G25 scaled coordinates, distances of ancient individuals to full modern populations averages datasheet:

Distance to: Bell_Beaker_England:I2416 (41% Neolithic British according to the official study):
0.05189469 Basque_Spanish
0.05292850 French_South
0.05369300 French_Occitanie
0.05375401 Spanish_Soria
0.05376447 Basque_French
(...)

Distance to: Bell_Beaker_England:I1767 (26% Neolithic British according to the official study):
0.02822366 Orcadian
0.02969795 English_Cornwall
0.03015939 English
0.03022438 Scottish
0.03076527 Welsh
0.03150396 French_Brittany
0.03255775 Irish
(...)

Distance to: Scotland_LBA:I2859 (18% Neolithic British according to the official study):
0.02322505 Welsh
0.02455399 Irish
0.02561519 English
0.02573993 English_Cornwall
0.02593560 Scottish
0.02600515 Orcadian
0.02735488 French_Brittany
(...)

Distance to: Scotland_LBA:I2861 (17% Neolithic British according to the official study):
0.02370501 Orcadian
0.02441159 Irish
0.02528121 Scottish
0.02696494 Shetlandic
(...)

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If you run samples with just 10% Neolithic British, they will not be so close to modern British populations.

Because modern British people have around 20% of Neolithic British DNA - not the too often repeated 10%.

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Neolithic British DNA levels for all individuals, the ones with ca. 20% are the most similar to modern British:

https://static-content.springer.com...jects/41586_2018_BFnature25738_MOESM2_ESM.pdf - see Tables S9, S10 and S11

ZV3ZMS0.png


This one - I5367 - was just 10% British Neolithic, and that's why is not so close to modern British, who are more Neolithic:

Using Global25 scaled again:

Distance to: Bell_Beaker_Scotland:I5367
0.02862240 Icelandic
0.03007086 Swedish
0.03263945 Norwegian
(...)

jCrjAim.png


^^^
On the other hand, I5379 (who was exactly 20% British Neolithic as seen above) is closest to modern Orcadians and Scottish.
 

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