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Early Back-to-Africa Migration into the Horn of Africa

Overview of attention for article published in PLoS Genetics, June 2014
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  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (98th percentile)
  • High Attention Score compared to outputs of the same age and source (97th percentile)

Mentioned by

blogs
4 blogs
twitter
123 X users
facebook
1 Facebook page
wikipedia
23 Wikipedia pages
googleplus
3 Google+ users
reddit
2 Redditors
video
1 YouTube creator

Citations

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90 Dimensions

Readers on

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157 Mendeley
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Title
Early Back-to-Africa Migration into the Horn of Africa
Published in
PLoS Genetics, June 2014
DOI 10.1371/journal.pgen.1004393
Pubmed ID
Authors

Jason A. Hodgson, Connie J. Mulligan, Ali Al-Meeri, Ryan L. Raaum

Abstract

Genetic studies have identified substantial non-African admixture in the Horn of Africa (HOA). In the most recent genomic studies, this non-African ancestry has been attributed to admixture with Middle Eastern populations during the last few thousand years. However, mitochondrial and Y chromosome data are suggestive of earlier episodes of admixture. To investigate this further, we generated new genome-wide SNP data for a Yemeni population sample and merged these new data with published genome-wide genetic data from the HOA and a broad selection of surrounding populations. We used multidimensional scaling and ADMIXTURE methods in an exploratory data analysis to develop hypotheses on admixture and population structure in HOA populations. These analyses suggested that there might be distinct, differentiated African and non-African ancestries in the HOA. After partitioning the SNP data into African and non-African origin chromosome segments, we found support for a distinct African (Ethiopic) ancestry and a distinct non-African (Ethio-Somali) ancestry in HOA populations. The African Ethiopic ancestry is tightly restricted to HOA populations and likely represents an autochthonous HOA population. The non-African ancestry in the HOA, which is primarily attributed to a novel Ethio-Somali inferred ancestry component, is significantly differentiated from all neighboring non-African ancestries in North Africa, the Levant, and Arabia. The Ethio-Somali ancestry is found in all admixed HOA ethnic groups, shows little inter-individual variance within these ethnic groups, is estimated to have diverged from all other non-African ancestries by at least 23 ka, and does not carry the unique Arabian lactase persistence allele that arose about 4 ka. Taking into account published mitochondrial, Y chromosome, paleoclimate, and archaeological data, we find that the time of the Ethio-Somali back-to-Africa migration is most likely pre-agricultural.

X Demographics

X Demographics

The data shown below were collected from the profiles of 123 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 157 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 4 3%
Colombia 2 1%
Kenya 1 <1%
Germany 1 <1%
Spain 1 <1%
United Kingdom 1 <1%
Unknown 147 94%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 44 28%
Researcher 22 14%
Student > Master 19 12%
Professor 10 6%
Student > Bachelor 10 6%
Other 26 17%
Unknown 26 17%
Readers by discipline Count As %
Agricultural and Biological Sciences 56 36%
Biochemistry, Genetics and Molecular Biology 32 20%
Medicine and Dentistry 7 4%
Arts and Humanities 7 4%
Social Sciences 5 3%
Other 20 13%
Unknown 30 19%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 137. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 25 March 2024.
All research outputs
#305,923
of 25,587,485 outputs
Outputs from PLoS Genetics
#168
of 8,986 outputs
Outputs of similar age
#2,483
of 243,942 outputs
Outputs of similar age from PLoS Genetics
#5
of 178 outputs
Altmetric has tracked 25,587,485 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 98th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 8,986 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 17.8. This one has done particularly well, scoring higher than 98% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 243,942 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 98% of its contemporaries.
We're also able to compare this research output to 178 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 97% of its contemporaries.