An Ice Age woman in France had ancestry linked across Europe

Source trail

Specimen

the paper's Provenance section records the older excavation history and later sampling.

Ancestry

Figure 3 and the Results explain the model linking predominantly western-related ancestry with an ancestor-related central/eastern contribution.

Boundary

the Discussion and supplement retain historical alternatives, sampling gaps and model uncertainty. They do not establish the woman's birthplace or personal movements. The sediment evidence has separate mixing and contamination limits.

Researchers analyzed a woman's bone fragment from Isturitz Cave in southwestern France. Their study of Isturitz ancient DNA found predominantly western-related ancestry, alongside an eastern-related signal. In the researchers' best-fitting model, that additional contribution comes from a lineage related to ancestors of sampled central/eastern European groups, not directly from those sampled people.

What did researchers recover from the bone?

The research concerns an older excavated specimen. The paper's provenance section, available in the Harvard institutional PDF copy, records that the bone was deposited at the Institut de Paléontologie Humaine after excavations in the 1950s and sampled for research in 2013. The new finding comes from genetic analysis, not the discovery of a new skeleton.

Researchers recovered genetic markers spread across the genome and compared them with other ancient samples. These positions in DNA help them investigate similarities and ancestry relationships. The Results and Methods describe statistical comparisons and models of population relationships. “Genome-wide” describes the spread of the markers; it does not mean every part of the woman's DNA was recovered.

What ancestry links does the model suggest?

In the model shown in Figure 3, her ancestry predominantly fits the western grouping called Fournol. An additional contribution is related to the ancestor of the Věstonice grouping, associated with sampled central/eastern populations. The model does not identify a particular community as the source of the contribution.

Fournol and Věstonice are genetic comparison groups, not nationalities or neatly bounded peoples. In section 5 of the supplement, the authors say the signal likely reflects an unsampled ancestor rather than deriving directly from Věstonice. That section is in the PDF inside the Harvard institutional supplement archive (ZIP).

The paper reports a comparable signal in a previously published individual from Ormesson. This is a reanalysis of existing data, rather than another newly recovered genome. In the Discussion, the authors consider the Isturitz and Ormesson findings together as evidence of east-west ancestry connections. They do not establish a personal relationship between those individuals.

How could those connections have formed?

The first explanation is gene flow between populations associated with western and eastern genetic groups during the Gravettian archaeological period. The second is an earlier ancestry contribution, predating the lineage represented by an older sample called Goyet Q116-1. The researchers favor the Gravettian interaction explanation, but their Discussion explicitly retains the older alternative.

Sparse sampling makes that choice difficult to settle. The Results note the absence of older southwestern genomes from the preceding Aurignacian period. Without those genomes, the researchers cannot directly compare the Isturitz result with the earlier regional ancestry that the second explanation proposes.

There is also uncertainty within the statistical analysis. The supplement's model discussion retains alternative plausible graphs of population relationships. These alternative fitted models are not the same thing as the two historical explanations. A model can fit the available genetic comparisons without establishing a unique sequence of past events.

What does the separate sediment sample add?

Another part of the study concerns ElMiron14, a sediment sample from El Mirón Cave in Spain, from a different period. It is separate from the Isturitz woman's bone. The authors interpret the sediment DNA as supporting the persistence of western-related ancestry in southwestern Europe through the Last Glacial Maximum, as described in the paper's abstract and sediment results. They do not establish a connection to her descendants.

The authors also report evidence of multiple contributors and modern contamination in that sample. Supplement sections 4.2 and 4.4 explain those concerns and the filtering used to reduce contamination. Filtering does not turn mixed sediment into one identified person's uncontaminated genome. The sample's ancestry result needs to be read alongside those limits.

The unresolved question is how and when the ancestry connection arose. The authors identify older southwestern evidence as a gap that further sampling could help address. The Isturitz source guide points to the passages behind each claim and shows how to keep their limits in your research notes.

Sources

• Pere Gelabert and colleagues, Early Gravettian genomic data from Western Europe reveal population movements before the LGM, Science Advances. Read the Harvard institutional PDF copy. Scientific identifier: DOI 10.1126/sciadv.aeh6128.
• Supplementary materials for the same study, particularly sections 4.2, 4.4 and 5. Download the Harvard institutional supplement archive (ZIP), containing the supplementary PDF and a separate table archive.

The institutional copies and supplements belong to the same study. They are alternative access points and supporting material, not independent confirmations.