View Full Version : The genetic landscape of Ethiopia

10-01-2019, 05:29 PM
The genetic landscape of Ethiopia: diversity, intermixing and the association with culture

The rich linguistic, ethnic and cultural diversity of Ethiopia provides an unprecedented opportunity to understand the level to which cultural factors correlate with -- and shape -- genetic structure in human populations. Using primarily novel genetic variation data covering 1,268 Ethiopians representing 68 different ethnic groups, together with information on individuals’ birthplaces, linguistic/religious practices and 31 cultural practices, we disentangle the effects of geographic distance, elevation, and social factors upon shaping the genetic structure of Ethiopians today. We provide examples of how social behaviours have directly -- and strongly -- increased genetic differences among present-day peoples. We also show the fluidity of intermixing across linguistic and religious groups. We identify correlations between cultural and genetic patterns that likely indicate a degree of social selection involving recent intermixing among individuals that have certain practices in common. In addition to providing insights into the genetic structure and history of Ethiopia, including how they correlate with current linguistic classifications, these results identify the most important cultural and geographic proxies for genetic differentiation and provide a resource for designing sampling protocols for future genetic studies involving Ethiopians.

URL: https://www.biorxiv.org/content/10.1101/756536v1

10-13-2019, 06:48 AM
This cladogram is rather interesting:


Some Tigraway speaker outliers clustering with Southwest Ethiopians and some Omotic speakers clustering with Northern Ethiopians.

10-14-2019, 08:40 AM
Something interesting I noticed: the Negede Woyto are an Amharic 'minority' population living in Bahir Dar (the capital of the Amhara province, nearby Lake Tana the source of the Blue Nile) and they have an ancient affinity with the Kafacho and Shekacho communities (sometimes also spelled Shekkacho or Shakacho). The latter two speak North Omotic languages but have elevated amounts of J1 and MENA-like autosomal affinities (compared to other Omotic groups).


It looks like Omotic speakers belonging to the Gonga group have the most Eurasian affinities within their sub-language family. The Shinasha seem close to Northwest Oromos.