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People buried in stone-cist graves based on ancient DNA

1200 - 400 BC
  • Culture
    Bronze Age
  • Population
    2000-4000
  • Genes
    21% European Hunther-Gatherers, 19% Early European Farmers, 60% Western Steppe Herders
  • Language
    North-West Indo-European proto-language, Proto-Germanic language
  • Climate
    Slightly warmer than today
  • Flora
    Mixed forest, birch, pine, semi-natural grasslands, crop
  • Fauna
    Wild animals same as today, additionally bisons, aurochs, goats, sheep, pigs and cattle.

We currently know the ancient DNA of people buried in Estonian, Finnish and Latvian Bronze Age stone graves only from Estonia – the remains of nineteen individuals from the Iru, Jõelähtme, Muuksi, Napa, Rebala, Väo and Vehendi graves have been studied.

When studying the genetic material of those buried in Estonian stone-cist graves, it has become clear that similarly to the prior Corded Ware peoples, a large role in the genesis of this group of people has been in the migration waves from three essential sources, the influence of which is indicated by the genome of the studied individuals that is studied through the ancestral components that can be connected to their heritage. These originate from the European Hunter-Gatherers, Early European Farmers originating from the Near East and the Western Steppe Herders of Eastern Europe. Even so, the genome of those buried in stone-cist graves differs from that of the Corded Ware peoples – the proportion of Western or Scandinavian Hunter-Gatherer heritage increased. It is interesting to note that the latest Estonian hunter-gatherer Comb Ceramic peoples belonged genetically to the slightly different Eastern Hunter-Gatherers, so that the genetic change that took place with the population of the Estonian territories building the stone-cist graves can rather be connected to Scandinavian influences that are visible also in the archaeological material.

The genetic “composition” of an individual buried in a stone-cist grave. 60% of Eastern European steppe people, 19% of Early a´Agriculturalists of the near-East and 21% of European Hunter-Gatherers.
Figure 1. The genetic “composition” of an individual buried in a stone-cist grave.

It was also discovered that in the Estonian territory precisely during the Bronze Age, those genetic variants became widespread the markers of which are now considered characteristic of North Europeans – light hair, eyes and skin and lactose tolerance.

Tabel 1. Phenotypes of the Estonian younger Bronze Age individuals 
Individual Date Eye colour Hair colour Skin colour Lactose tolerance High cholesterol
Jõelähtme 7 1220–1010 calBCE blue brown/ dark brown medium + - + +
Jõelähtme 34 1060–850 calBCE brown dark brown/ black medium - - + -
Muuksi Lõokese  skeleton 1 930–810 calBCE blue blond medium + - + -
Muuksi Lõokese skeleton 3 1220–1020 calBCE blue brown/ dark brown medium - - + -
Muuksi Toomani 5 1280–1050 calBCE brown dark brown/ black medium + - + -
Napa 3 1030–890 calBCE blue dark brown/ black medium + - + -
Rebala Lastekangur 2 780–430 calBCE blue dark brown/ black medium + + + -
Väo Jaani A  skeleton 1 730–390 calBCE brown dark brown/ black medium - - - - 
Väo Kangru 8 skeleton 1 930–810 calBCE blue brown/ dark brown fair + - - -
Vehendi 11 skeleton III 1210–1000 calBCE blue dark brown/ black medium + - + -

Among the studied Bronze Age individuals, two second degree relatives were found – probably an uncle and his nephew. Somewhat surprisingly, the relatives were not buried in the same site, but in Rebala and Väo burial sites 13 km apart. The discovery of close relatives from such a small selection and from different burial sites can indicate that only a certain part of the population was buried in the stone-cist graves (the so-called elite).

Still noteworthy is one individual who was buried in a stone-cist grave, but at a significantly later date – during a later Iron Age burial. This person buried in the Loona burial site differs from the prior stone-cist grave burials also genetically – similarly to the ones buried in Iron Age tarand-graves, a fourth ancestral component can be found in his genome, apparently originating from Siberia, that has likely been accrued during the arrival of a new Early Iron Age migration wave.

Read more

Saag, L., Laneman, M., Varul, L., Malve, M., Valk, H., Razzak, M. A., Shirobokov, I. G., Khartanovich, V. I., Mikhaylova, E. R., Kushniarevich, A., Scheib, C. L., Solnik, A., Reisberg, T., Parik, J., Saag, L., Metspalu, E., Rootsi, S., Montinaro, F., Remm, M., Mägi, R., D’Atanasio, E., Crema, E. R., Díez-del-Molino, D., Thomas, M. G., Kriiska, A., Kivisild, T., Villems, R., Lang, V., Metspalu, M., Tambets, K. 2019. The arrival of Siberian ancestry connecting the Eastern Baltic to Uralic speakers further east. – Current Biology, 29/10, 1701–1711.

Kriiska, A. Lang, V., Valk, H., Tambets, K., Saag, L. & Metspalu, M. 2019. Vana DNA – uus sõnumitooja Eesti rahvastiku ajaloo kohta. – Tutulus 2018, 5–8.

Linnaleht „Kes me, eestlased, oleme ja kust me tuleme?” (06.07.2018)

References

Raadio Elmar “Maailmamix” (18.02.2018)

Raadio Kuku „Kukkuv õun” (26.05.2019)

Saag, L., Tambets, K. & Metspalu, M. 2018. Kust me tuleme? Demograafiline ajalugu eestlaste geenides. – Horisont 1/2018, 42–46.

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