When did the genetic divergence of R1a occur?
The genetic divergence of R1a occurred 25,000 years ago. This timeframe coincides with the last glacial maximum.
Questions about Haplogroup R1a
Short answers, pulled from the story.
Where is the geographic origin of haplogroup R1a according to a 2014 study?
A 2014 study by Peter A. Underhill et al. concluded that the Middle East was the geographic origin. They suggested this location was possibly near present-day Iran.
What is the oldest known sample of R1a and when does it date from?
The oldest sample Vasilevka 497 dates to c. 8700 BCE. It comes from remains found in Estonia, Poland, Russia, or Ukraine as part of ten ancient basal R1a* genotypes recovered and published as of 2025.
Which populations have the highest frequency of R1a1a in Europe?
The highest frequency of R1a1a in Europe is observed in Sorbs at 63%. Hungarians follow closely with 60% while other groups range from 27% to up to 58% including Czechs, Poles, Slovenians, Slovaks, Moldovans, Belarusians, Rusyns, Ukrainians, and Russians.
How did researchers determine the origins of R1a1a in South Asia?
South Asian populations have the highest STR diversity within R1a1a indicating deep roots in this region. Studies found high frequencies in West Bengal Brahmins at 72%, Bhanushali groups at 67%, and Gujarat Lohanas reaching 60%.