Percentage of WHG by area in Sardinia.

[Flashball]

Percentage of WHG (Western Hunter-Gatherer) contribution by area in Sardinia.
https://pbs.twimg.com/media/GEf8B0dXcAAHkc5?format=jpg&name=4096x4096

[Flashball]

Average by area:
https://image.noelshack.com/fichiers/2024/04/7/1706446080-ge3xtkdwwaaz0kw.jpeg

[Voskos]

It is close to the studies.


With our more refined modeling, the proportion of ancestry from the first farmers of Sardinia (comprised of sources from Anatolian farmers and western hunter-gatherers)2 is around 72.2% (= 62.5% Anatolian Neolithic + 9.7% WHG)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7080320/

[Flashball]

It is close to the studies.


https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7080320/

WHG is more high in reality with a normal model (barcin + WHG), but with a LBK sample (4% WHG) it's between 5% (in some area) to 17.6% (Gairo, average with a LBK sample) according this study :
https://www.nature.com/articles/s41588-018-0215-8.epdf?author_access_token=m5JXNcoqqnFVpZn9Qv40VtR gN0jAjWel9jnR3ZoTv0NAgrDcTnHLukkHqktqMDwvotOoRVheU jl48G9WLksFJDVbYFz63NoP6UrzkUGAzsGNsTWDsHwCVhA9SIV 60FGYsxedL6SaA0LXgE7RJ0fP5A%3D%3D
https://www.readcube.com/articles/supplement?doi=10.1038%2Fs41588-018-0215-8&index=0
https://www.readcube.com/articles/supplement?doi=10.1038%2Fs41588-018-0215-8&index=2


"GAIRO (Sample size: 8)
Range: Min 12.3% - Max 22.9%

VILLAGRANDE (Sample size: 17)
Range: Min 3.5% - Max 23.5%

TORTOLI (Sample size: 18)
Range: Min 4.4% - Max 22.8%

ARZANA (Sample size: 41)
Range: Min -0.18% - Max 18%

LOCERI (Sample size: 10)
Range: Min -2.46% - Max 19.5%

NUORO (Sample size: 75)
Range: Min 0.67% - Max 18.3%

BARISARDO (Sample size: 15)
Range: Min -3.3% - Max 22.5%

ORISTANO (Sample size: 84)
Range: Min -3.25% - Max 12.3%

LANUSEI (Sample size: 62)
Range: Min -4.17% - Max 11.03%

CAGLIARI (Sample size: 289)
Range: Min -1.54% - Max 10.06%

OLBIATEMPIO (Sample size: 18)
Range: Min 0.65% - Max 21.95%

ILBONO (Sample size: 50)
Range: Min -4.7% - Max 11.9%

SASSARI (Sample size: 87)
Range: Min 0% - Max 13.7%

CARBONIA (Sample size: 41)
Range: Min -2.5% - Max 2.5%

This list provides the estimated range of Loschbour genetic contribution for different Sardinian regions. The ranges take into account the standard error associated with each estimate."
"Loschbour" refers to an ancient hunter-gatherer individual from whom a genome was sequenced. The Loschbour man was a Mesolithic individual whose remains were found in Loschbour, Luxembourg."

[Voskos]

Why is it so high in Ogliastra? Population isolate with no interactions?

[Flashball]

Why is it so high in Ogliastra? Population isolate with no interactions?

The rate of WHG (even with a sample of LBK) is quite variable within the different villages of the province of Ogliastra, but it can nevertheless be said that indeed the greatest rates and variabilities of WHG consumption are found in the villages of this province.

Why? It is likely that endogamy played an important role (it is said in another study or in this one, I don't remember, that two villages in Ogliastra separated by a few kilometers had their own genetic signature).

[Beowulf]

i find interesting that sample from Carloforte why does it have so much Yamnaya admixture? It have a level similar to Iberians.

[Flashball]

i find interesting that sample from Carloforte why does it have so much Yamnaya admixture? It have a level similar to Iberians.

They are mostly ligurians
https://pastebin.com/8hqpC77S

Carloforte was founded in the 18th century by around 30 families of coral fishers, originally from the Ligurian town of Pegli, near Genoa.

https://www.jstor.org/stable/41937624

https://www.nature.com/articles/srep41614


Our analysis highlights a continuous pattern of genomic variation among populations that has been categorized as open and isolated. Looking at the first principal component, it is possible to identify a denser area, which corresponds to the high homogeneity of open populations, and another sparser zone, which reflects the greater diversity among isolates. In the contact zone, we found Cimbrians, who cluster along the first principal component with the open populations, while Carloforte and Sulcis Iglesiente are borderline. The behaviour of these three populations, all of which have been subject to both geographic and linguistic barriers in the course of their recent history, does not mean that their genomic structure is only marginally different from that of open populations. Rather, it points to the lack of any clear discontinuities between the two groups when multiple indicators of isolation are used simultaneously. In fact, these three populations show signatures of past inbreeding which were undetected in the open ones. This is effectively evidenced by their long upper tails of pairwise intra-population IBS and IBD block sharing (Supplementary Figure S4) and, in a more irregular fashion, by other measures of intra-population variation. A breakdown of the cultural barrier might account for the behavior of Cimbrians. In fact, only a limited number of individuals is today able to use the Cimbrian language41, a situation in contrast with the persistence of the original linguistic features in other German speaking communities42. This form of cultural assimilation, which started in the middle of the 16th century43, probably increased the permeability of Cimbrians to gene flow from neighbouring populations. Carloforte is the most recent isolate of our dataset, with the founding event dating back to 1738 AD. The small time since isolation and the genetic introgression associated with migratory waves from Tunisia, Liguria and Campania have presumably limited the effect of inbreeding and drift on the genome44,45. The attenuation of isolation signatures for Sulcis Iglesiente compared to other Sardinian populations may be explained by the more exogamous behaviour of the villages in this area, a likely consequence of their location in coastal plains close to the Mediterranean Sea.