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Hi,
L1b1a has been found in Iberia in human remains older than 2,000 years Before Christ.
So if your Gedmatch calculators do not show reasonable amounts of African %, it might be the case of a very old lineage that came to Iberia long time ago and then mixed with Europeans. However, I do not know how to calculate any age estimate based on the % from Gedmatch calculators.
For instance if GedMatch Eurogenes K13 or K15 show a 3% African, would it be possible to estimate when the haplogroup entered Europe? I leave it to the experts.
Below there is some info:
a) https://bellbeakerblogger.blogspot.c...45rise695.html
Right now I4245 is the single individual of the Iberian test group that is without question a 'real' Bell Beaker, at least in my opinion. Oddly enough, her maternal haplogroup is not common to Europe, being L1b1a, which we already knew from the previous RISE study. Genetically, she is a Neolithic European.
Sample I4245/RISE659 was obtained from a tomb with a double inhumation in a small artificial cave from Funerary Area 2. A 1–5-year-old child was inhumated at the far end of the cave and was covered by the body of a 20–30-year-old woman, carefully placed in supine position with the head to the left and flexed legs. The woman's head, which rested on a pillow made with a grass fill, revealed an intentional cranial deformation from childhood. Both bodies are known to have decomposed within the infilled space. In terms of the grave goods, a small decorated cup was found on the child, whereas two bigger decorated inlayed cups had been placed between the breast and left arm of the woman. The child was radiocarbon dated to 1960–1740 calBCE (3525±40 BP, Ua-35021). No date is available for the woman, who was sampled for aDNA analysis, but the context suggests that both were interred at the same time:
I4245/RISE695: 2280–1790 BCE
L1b1a was found by Olalde, I. et al. (Iñigo Olalde et al. The Beaker Phenomenon And The Genomic Transformation Of Northwest Europe, 2017. https://www.biorxiv.org/content/bior...35962.full.pdf) at Camino de las Yeseras (San Fernando de Henares, Madrid) [I4245 / RISE695] on a Bell Beaker site 2280–1790 BCE.
Bell Beaker, Spain, Camino de las Yeseras (San Fernando de Henares, Madrid)
2280–1790 BCE 14942 L1b1a [I]Olalde 2017
§§§ https://amtdb.org/records/366
b) (https://www.nature.com/articles/s41598-017-15480-9#Fig1).
The maternal genetic make-up of the Iberian Peninsula between the Neolithic and the Early Bronze Age.
Anna Szécsényi-Nagy, Christina Roth, […]Kurt W. Alt Scientific Reportsvolume 7, Article number: 15644 (2017).
>> "An interesting exception is haplogroup L1b in the Late Chalcolithic central Iberia at the site Camino de las Yeseras (n. 57 on Fig. 1), near Madrid.
c) (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3337428/).
Reconstructing ancient mitochondrial DNA links between Africa and Europe.
María Cerezo,1,7 Alessandro Achilli,2 Anna Olivieri,3 Ugo A. Perego,3,4 Alberto Gómez-Carballa,1 Francesca Brisighelli,1,5 Hovirag Lancioni,2 Scott R. Woodward,4 Manuel López-Soto,6 Ángel Carracedo,1 Cristian Capelli,5 Antonio Torroni,3 and Antonio Salas1,7,8.
>> "A large proportion (65%) of the African-European mtDNAs investigated could be attributed to modern and well-documented demographic routes that existed during the Romanization period, the Arab conquest, and the trans-Atlantic slave trade. However, there is strong evidence pointing to the fact that the remaining 35% of the L-European mtDNAs stand as modern witnesses of sporadic population movements occurring between the two continents that might have begun as early as 11,000 yr ago (Fig. 5)."
>> "Apart from L1b1a8, there are other minor new clades of L1b that might have originated in Europe. Members of haplogroup L1b1a11 were only found in North-central Europe (Ireland, Switzerland, and Slovenia), while L1b1a12 has representatives only in Iberia (Portugal and Catalonia)."
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Originally Posted by Saskia
