Who were the Thracian (850 – 0 BC)?

Thracian is one of the 27 curated source populations in the Classical Antiquity era of the Ancestrify qpAdm analysis: a group of published ancient genomes from one archaeological context, pooled as a single reference the model can test your genome against.

Does Thracian in my result mean they were my ancestors?

No. A source population is a reference the model tests against, never a statement about who your ancestors were. A coefficient on this source means the ancestry those burials represent helps explain your genome to within statistical noise — similar ancestry composition, not descent from those individuals. Ancestrify never claims a population is your ancestor.

What does a Thracian percentage in a qpAdm model mean?

qpAdm estimates the mixture proportions that best explain your genome as a combination of the chosen sources, given a fixed set of outgroup (right) populations, and reports a p-value for whether the model is statistically acceptable together with a standard error for every proportion. The percentage is that estimated share, with its uncertainty published beside it.

How do I get a qpAdm model that uses Thracian?

Order the Ancestrify qpAdm analysis (€29.99, one-time) and upload the raw file you already have from a consumer test. Your genome is merged into the AADR reference panel and modelled across both eras; each era's model is built from that era's source populations, so a model for the Classical Antiquity era draws on Thracian where it improves the fit.

Can I model Thracian ancestry for free first?

Yes. The Ancestrify Lab runs Global25 admixture calculators, a nearest-populations distance tool and an AdmixTools 2 workbench in your browser with no account, and several calculators cover the Classical Antiquity era. Those are G25 fits, not formal qpAdm models — the paid analysis is the one with a p-value.

Thracian — ancient DNA source population (qpAdm)

Who they were

Artistic interpretation of the Thracian (AI-generated artwork, not documentary evidence)

Period: 850 – 0 BC
Era in the analysis: Classical Antiquity
Region: Eastern Balkans, Bulgaria and Thrace
Role in the model: Source (left) population — a reference qpAdm tests against

The Thracians were the Iron Age peoples of the eastern Balkans — present-day Bulgaria, European Turkey, northern Greece and southern Romania — known for their gold-rich tombs, their horsemen and their kingdoms of the Odrysians and Getae. Ancient genomes from the region show a Bronze Age Balkan population of Neolithic farmer, steppe-related and hunter-gatherer ancestry, with a higher steppe-related share than the Aegean to the south and an Iranian- or Caucasus-related component that had arrived through Anatolia and the Black Sea (Lazaridis et al. 2022; Olalde et al. 2023).

Thracian-related ancestry is the pre-Roman and pre-Slavic foundation of present-day Bulgarians, Romanians and northern Greeks, and a related layer in Macedonians and Serbs. In the model it is the eastern Balkan pole of the era, between the Illyrian source to its west, the Ancient Greek and Aegean sources to its south and the Pontic source across the Black Sea.

In Ancestrify's qpAdm service, Thracian is a source in the "Classical Antiquity" era. The report shows its weight with a standard error and a Z-score, so you can see not only how much of the model it carries but how confidently that share is separated from zero, and a model that cannot support it is rejected rather than published. For Bulgarian, Romanian and northern Greek genomes its weight against the Early Slavic source describes how much of the medieval inflow the model detects, and against the Illyrian source how far the two related Balkan references could be told apart.

Y haplogroups E-V13, J2, R1b-Z2103 and I2a, and mtDNA H, K, J and U5, are reported from these samples. A haplogroup alone is never evidence of a share.

In your report
An Indo-European-speaking people who inhabited the eastern Balkans and parts of western Anatolia from the Bronze Age through Roman times, occupying a geographic position between the Mediterranean and the Pontic steppe. Ancient mitochondrial DNA from Bronze Age Bulgaria reveals that Thracians held an intermediate genetic position between Early Neolithic farmers and Late Neolithic–Bronze Age steppe pastoralists. Iron Age Thracian samples show continued genetic continuity with earlier European farmer populations, suggesting stable local ancestry in southeastern Europe over two millennia. The broader Balkan region where Thracians lived served as a nexus between eastern and western populations, experiencing intermittent steppe contact up to 2,000 years before the major northern European steppe migrations. Later Roman Imperial and Slavic Migration Period demographic changes largely replaced Thracian-specific ancestry in the region.

Artwork is an AI-generated artistic interpretation informed by the archaeological record — not documentary evidence.

Where this population sits in the model

The Ancestrify qpAdm analysis models your genome once per era. The Classical Antiquity era has 27 curated source populations, and Thracian is one of them: every candidate model for that era is a combination of these sources, tested against a fixed set of outgroup populations, and only a model that passes the statistical fit check is published — with a p-value, and a standard error on every proportion.

A reference, not a verdict: every population on this page is a source the model tests your genome against — a well-sampled point in ancient genetic space that a mixture of ancestries can be expressed in terms of. A weight on it means your genome is well described as partly resembling those people; it is never a statement that they, specifically, were your ancestors, and a population that fits well is not the only one that could.

Read how the method works on the qpAdm analysis page, or the definitions in the glossary.

Model it yourself for free

The Ancestrify Lab runs in your browser, with no account. Paste a Global25 row into an admixture calculator that covers the Classical Antiquity era, rank the closest ancient populations in the distance tool, or run f4, qpWave and qpAdm on the public panel in the AdmixTools 2 workbench. These are Global25 fits and exploratory statistics, not the formal qpAdm model of the paid analysis.

Questions

Who were the Thracian (850 – 0 BC)?
Thracian is one of the 27 curated source populations in the Classical Antiquity era of the Ancestrify qpAdm analysis: a group of published ancient genomes from one archaeological context, pooled as a single reference the model can test your genome against.
Does Thracian in my result mean they were my ancestors?
No. A source population is a reference the model tests against, never a statement about who your ancestors were. A coefficient on this source means the ancestry those burials represent helps explain your genome to within statistical noise — similar ancestry composition, not descent from those individuals. Ancestrify never claims a population is your ancestor.
What does a Thracian percentage in a qpAdm model mean?
qpAdm estimates the mixture proportions that best explain your genome as a combination of the chosen sources, given a fixed set of outgroup (right) populations, and reports a p-value for whether the model is statistically acceptable together with a standard error for every proportion. The percentage is that estimated share, with its uncertainty published beside it.
How do I get a qpAdm model that uses Thracian?
Order the Ancestrify qpAdm analysis (€29.99, one-time) and upload the raw file you already have from a consumer test. Your genome is merged into the AADR reference panel and modelled across both eras; each era's model is built from that era's source populations, so a model for the Classical Antiquity era draws on Thracian where it improves the fit.
Can I model Thracian ancestry for free first?
Yes. The Ancestrify Lab runs Global25 admixture calculators, a nearest-populations distance tool and an AdmixTools 2 workbench in your browser with no account, and several calculators cover the Classical Antiquity era. Those are G25 fits, not formal qpAdm models — the paid analysis is the one with a p-value.