Eurasia K20
Eurasia K20 — Modern + Ancient admixture snapshot
Quickly quantify genome-wide ancestry against 20 curated modern and ancient components spanning Eurasia, Africa, Oceania and the Americas. Designed for hobbyists, genealogists and researchers, it highlights Steppe, Neolithic farmer, Siberian, East/Southeast Asian, South Asian, Papuan, African and Native American affinities to contextualize both recent and deep ancestry.
פרטי המחשבון
מידע על מחשבון ההרכב הגנטי
על המחשבון
Eurasia K20 — Modern + Ancient Admixture Calculator
This calculator estimates an individual's autosomal ancestry proportions against 20 curated reference components spanning modern and ancient Eurasian, African, Oceanian and American diversity. It is built for anyone curious about deep and recent ancestry: hobbyist genetic genealogists, population geneticists, students, and researchers performing broad comparative analyses.
What this analyzes
- Genome-wide autosomal SNP data compared to 20 reference populations (modern and ancient) to produce proportional ancestry estimates.
- Components capture major demographic signals such as Steppe, Near Eastern, European farmer, Siberian, East and Southeast Asian, South Asian, Papuan, Sub‑Saharan African, and Native American affinities.
Reference components (K=20): NE_ASIAN, N_AMERINIDIAN, SSA, EEF, SE_ASIAN1, S_INDIAN, SHG_WHG, S_AMERINDIAN, KHOISAN, SW_ASIAN, KALASH, E_ASIAN, PYGMY, SE_ASIAN2, CAUCASUS_GEDROSIA, PAPUAN, EUROPEAN, YAMNAYA, E_SIBERIAN, W_SIBERIAN
Insights you can gain
- Quantified ancestry fractions that help place an individual along Eurasian clines and detect non‑European, African, Oceanian, or Native American admixture.
- Signals tied to major historical events: Neolithic farmer expansion (EEF), Steppe migrations (Yamnaya), Mesolithic hunter‑gatherer ancestries (SHG/WHG), and deeper Siberian/East Asian links.
- Finer distinctions within Asia (E_SIBERIAN vs. W_SIBERIAN; multiple SE_ASIAN components) and between South Asian and Near Eastern affinities.
Context & value
- Combines modern and ancient reference profiles to illuminate both recent pedigree-level admixture and deeper population history.
- Useful for triangulating hypotheses about regional ancestry, exploring migration scenarios, and augmenting genealogical results from consumer tests.
Limitations
- Results are model-dependent: component labels are proxies for genetic clusters, not fixed ethnic identities. Interpret proportions as population
אוכלוסיות ייחוס
האוכלוסיות שהמחשבון משתמש בהן כייחוס גנטי
20 אוכלוסיות ייחוס
- NE_ASIAN: Northeast Asian populations, encompassing regions like Siberia.
- N_AMERINIDIAN: North Amerindian groups, including indigenous populations of North America.
- SSA: Sub-Saharan African populations, representing diverse ethnic groups below the Sahara.
- EEF: Early European Farmers, relating to early agricultural societies in Europe.
- SE_ASIAN1: Southeast Asian populations, including groups like the Vietnamese and Thai.
- S_INDIAN: South Indian groups, predominantly Dravidian ethnicities from southern India.
- SHG_WHG: Scandinavian Hunter-Gatherer and Western Hunter-Gatherer populations, ancient European foragers.
- S_AMERINDIAN: South Amerindian populations, native groups from South America.
- KHOISAN: Khoisan populations, indigenous peoples of southwestern Africa.
- SW_ASIAN: Southwest Asian populations, including groups from the Arabian Peninsula and Iranian Plateau.
- KALASH: The Kalash, a unique ethnic group residing in the Chitral region of Pakistan.
- E_ASIAN: East Asian populations, including Chinese, Japanese, and Korean ethnicities.
- PYGMY: Pygmy populations, indigenous groups in Central Africa.
- SE_ASIAN2: Additional Southeast Asian populations, covering more of the regional diversity.
- CAUCASUS_GEDROSIA: Populations from the Caucasus and Gedrosia region, covering areas like Armenia and parts of Iran.
- PAPUAN: Papuan populations, indigenous peoples of Papua New Guinea and nearby islands.
- EUROPEAN: European populations, broadly covering the continent's ethnic diversity.
- YAMNAYA: Yamnaya, an ancient culture from the Pontic-Caspian steppe, significant in the spread of Indo-European languages.
- E_SIBERIAN: East Siberian populations, indigenous groups of Eastern Siberia.
- W_SIBERIAN: West Siberian populations, representing groups from the western part of Siberia.
הבנת ניתוח ההרכב הגנטי
כך פועלים המחשבונים, וכך קוראים את התוצאות
מהו ניתוח הרכב גנטי?
ניתוח הרכב גנטי משווה את ה-DNA לנתונים של אוכלוסיות ייחוס מרחבי העולם. הוא מעריך את מידת הדמיון לרכיבי הייחוס שמהם המודל בנוי.
המחשבון משתמש ב-20 אוכלוסיות ייחוס שנבחרו בקפידה כדי לבחון דמיון גנטי.
איך הניתוח עובד?
- הניתוח משווה את ה-DNA ל-20 אוכלוסיות ייחוס
- הניתוח משתמש באוכלוסיות ייחוס מהתקופות המוצגות.
- התוצאות מראות את מידת הדמיון הגנטי לקבוצות אלה
- ההתאמה של הייחוס והמגוון שלו משפיעים על איכות ההשוואה
הבנת התוצאות
התוצאות מציגות שיעורים מוערכים בתוך מודל ההשוואה לאוכלוסיות הייחוס. כדאי לזכור את הנקודות האלה:
- התוצאות מבטאות דמיון גנטי ואינן מוכיחות מוצא ישיר
- ההשוואה נשענת על אוכלוסיות הייחוס שכלולות במחשבון.
- השיעורים מראים את המשקל היחסי של כל רכיב במודל
- התוצאות הן אומדנים המבוססים על נתוני הייחוס הזמינים