DNA matches reported by 23andme for 75 Africans

Wishing to share the vibranium 😉 I have created a new page featuring the DNA matches reported by 23andme for 75 Africansall across the continent. These results were collected by me in 2015 when 23andme’s Countries of Ancestry (CoA) tool was still available.

My survey results might have limitations in several regards but I do believe these African CoA results can still reveal relevant tendencies in DNA matching. I intend to compare these preliminary matching patterns eventually with my more recent findings for Africans who tested on Ancestry. I provide detailed background info as well as screenshots of the individual results on this page:

(click to enlarge)

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“Benin/Togo” also describes DNA from Ghana & Nigeria

I have created a new page featuring the AncestryDNA results for West Africans from the following countries: Liberia, Ivory Coast, Burkina Faso, Ghana, Togo & Benin. I will create a new section for the remaining part of West Africa (Upper Guinea) shortly. The number of results I have collected so far might be minimal but already my survey findings turn out to be quite insightful. I also provide some statistical data, analysis and relevant context. Follow this link to view the page:

In addition I also discuss the implications these findings might have for Afro-Diasporans in an attempt to improve proper interpretation of their West African regional scores, in particular for “Ivory Coast/Ghana” and “Benin/Togo”. One of these implications I will also discuss in greater detail in this blog post:

“Benin/Togo” is also predictive of Ghanaian & Nigerian DNA

The so-called “Benin/Togo” region seems to be quite predictive of Beninese origins (based on two results). However in addition ancestry from eastern Ghana and southern Nigeria might also be described by this region. You will need to perform your own follow-up research in order to find out more specifics.

Map 1 (click to enlarge)

Benin Togo

Source: ancestry.com

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Chart 1 (click to enlarge) 

Stats (GH=22)

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“Ivory Coast/Ghana” also describes Liberian DNA

I have created a new page featuring the AncestryDNA results for West Africans from the following countries: Liberia, Ivory Coast, Burkina Faso, Ghana, Togo & Benin. I will create a new section for the remaining part of West Africa (Upper Guinea) shortly. The number of results I have collected so far might be minimal but already my survey findings turn out to be quite insightful. I also provide some statistical data, analysis and relevant context. Follow this link to view the page:

In addition I also discuss the implications these findings might have for Afro-Diasporans in an attempt to improve proper interpretation of their West African regional scores, in particular for “Ivory Coast/Ghana” and “Benin/Togo”. One of these implications I will also discuss in greater detail in this blog post:

“Ivory Coast/Ghana” is also predictive of Liberian & Sierra Leonean DNA

The socalled “Ivory Coast/Ghana” region is indeed quite predictive of both Ghanaian and Ivorian origins. However in addition ancestry from Liberia and to a lesser degree (southern) Sierra Leone might also be described by this region. You will need to perform your own follow-up research in order to find out more specifics.

Map 1 (click to enlarge)

IvcGhana region

Source: ancestry.com. (text in red added by myself)

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Chart 1 (click to enlarge) 

Stats (GH=22)

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African DNA Cousins reported for people across the Diaspora

This blog post features the AncestryDNA results of 8 persons from 7 different countries. In particular i will list the (most likely) African DNA matches i was able to find for each profile. Using the tutorial i blogged about in my previous blog post:

Naturally this overview is not meant to be representative per se because these persons are in the first place individuals with unique family trees. It is mainly to show the variation across the Afro-Diaspora. Nonetheless I strongly suspect that many patterns to be observed will still be valid as well for other people of the same nationality or ethnic (sub)group.

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Diaspora Overview

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For this overview I specifically chose people with one single predominant African regional score on AncestryDNA. In order to see how Ancestry’s “Ethnicity Estimate” lines up with predicted African DNA matches. More detailed analysis will follow in this blog post. If you continue reading you will also come across a section featuring inspiring stories of people who were able to reconnect with their African kin through DNA testing.

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AncestryDNA Results Across the Diaspora

In 2013 AncestryDNA updated their Ethnicity Estimates to include a very detailed breakdown of West African ancestry (see this article). Soon afterwards I started collecting AncestryDNA results in an online spreadsheet in order to conduct a survey of the African regions being reported by AncestryDNA, among both African Americans as well as other Afro-descended nationalities. Attempting to establish how much the AncestryDNA results on an aggregated group level can already (despite limitations of sample size) be correlated with whatever is known about the documented regional African roots for each nationality.

Rumour has it that AncestryDNA will shortly start rolling out a new update of their Ethnicity Estimates. So it seems the time is right to finalize my survey. The sample size for most groups appears to be suffciently robust now to allow a meaningful intercomparison. In the AncestryDNA section of my blog (see the menubar) you can find a detailed summary of my survey findings based on 707 results for 7 nationalities:

Gathering all the results was a great learning experience. It has been a very satisfactory project! My survey report merely represents my personal attempt at identifying generalized, preliminary and indicative patterns on a group level inspite of individual variation. Everyone has a unique family tree of course first of all.

I would like to thank again all my survey participants for sharing their results with me. I am truly grateful for it!

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This frequency of regions being ranked #1 (regions with the highest amount in the African breakdown) is perhaps the best indicator of which distinct African lineages may have been preserved the most among my sample groups.”

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FREQ #1 regions

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Louisiana: most African diversity within the United States?

Louisiana Slave Database 1719-1820

SUMMARY

Number of slaves with origin specified 29,769
American born (“Creole”) 13,618 (45% of total)
African born 16,099 (54% of total)
African specified ethnically 8,994 (30% of total)

TOP 3 BREAKDOWN OF AFRICAN BORN SLAVES

Congo (Central Africa) 2,988 – 33% of African specified
Mandinga (Upper Guinea) 922 – 10% of African specified
Mina (Ghana, Togo, Benin) 628 – 7% of African specified
Source: Slavery and African Ethnicities in the Americas: Restoring the Links (Hall, 2005).

Congo Square

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Gwendolyn Midlo Hall’s remarkable relational database of Louisiana slaves and freedmen (1719-1820), which contains records of over 100,000 enslaved people, includes nearly 9,000 individual Africans by specific ethnicity. The database was first published in 2000 as a CD-ROM, and it is now available free on the Internet. The database is derived largely from notarial and ‘‘succession’’ (probate) records, mostly in French, in which slaves often self-identified their ‘‘nations’’ or ‘‘countries’’. There are 217 different ethnicities recorded, of which 96 have been identified, and a further 121 (comprising 152 individuals) which have not been identified. Of those identified, just 18 ethnicities account for over 96% of the Africans in the Louisiana records. In addition, within that set of 18 principal ‘‘nations,’’ the seven most common (in order, Kongo, Mandingo, Mina, Senegal/Wolof, Igbo, Bamana, Chamba), comprise over three-quarters of the sample. The single most numerous ‘‘nation’’ in the dataset was Africans from Kongo (nearly 3,000 individuals), the vast majority of whom arrived in the late eighteenth and early nineteenth centuries” (Chambers, 2008, pp.335-336).

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For a direct link to this extremely fascinating and online searchable database created by Gwendolyn Midlo Hall see below:

Louisiana Slave Database 1719-1820

A full overview of the 18 most frequently named African origins can be seen in the remaining part of this blogpost in which i will attempt to provide more details and context about Louisiana’s African diversity. Lees verder

The Igbo Connection for Virginia & Virginia-Descendants

Igbo Farm Village Compile3

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TAST (VA, SC, percentages)

Trans-Atlantic Slave Trade Database (2010) (http://www.slavevoyages.org/)

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Chambers (2002) - Table1, Estimated Percentage of Igbo captives

Source: “Rejoinder – The Significance of Igbo in the Bight of Biafra Slave-Trade- A Rejoinder to Northrup’s Myth Igbo ” (D.B. Chambers, 2002)

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ah3_m011

Domestic Slave Trade routes from Virginia to the Deep South

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at least 60% of Black Americans have at least 1 Igbo ancestor” (Dr. Douglas B. Chambers during Radio Interview (recommended listening)

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Specifying the African Origins of the Afro Diasporan Genome (part 1)

Montinaro (2015) - Fig. 1 Samplegroups & Clusters

Unravelling the hidden ancestry of American admixed populations (Montinaro et al., 2015)

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Montinaro (2015) - Supplement - 3way Breakdown

Own calculations based on “Unravelling the hidden ancestry of American admixed populations” (Montinaro et al., 2015)

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“Although our sampling of Africans is incomplete, we see variation among groups in similarity to present-day populations from different parts of Africa. In all groups, the Yorubans from West Africa are the largest contributor, confirming this region [Lower Guinea] as the major component of African slaves” (Montinaro et al., 2015, p.3)

“In addition, more than 30% of the total slaves arriving in mainland Spanish America up to the 1630s came from Senegambia, and we accordingly find that the relative contribution from the Mandenka is higher in all areas historically under the Spanish rule.(Montinaro et al., 2015, p.4)

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Specifying the African origins of the African American genome

(Zakharia et al., 2009) (Fig.1)

Characterizing the admixed African ancestry of African Americans (Zakharia et al., 2009)

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(Zakharia et al., 2009) (Table1)

Characterizing the admixed African ancestry of African Americans (Zakharia et al., 2009)

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“We found that all the African Americans are admixed in the African component of their ancestry, with estimated contributions of 19% West (for example, Mandenka), 63% West Central (for example, Yoruba), and 14% South West Central or Eastern (for example, Bantu speakers), with little variation among individuals.” (Zakharia et al., 2009, p.8)

“These results are consistent with historic mating patterns among African Americans that are largely uncorrelated to African ancestral origins, and they cast doubt on the general utility of mtDNA or Y-chromosome markers alone to delineate the full African ancestry of African Americans.”  (Zakharia et al., 2009, p.1)

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Locating Afro-Diasporan haplogroups within Africa

Dissecting... (Tabel S6, country breakdown)a

Dissecting the Within-Africa Ancestry of Populations of African Descent in the Americas (Stefflova et al., 2011)

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Limitations of our study

Our database and analyses have several limitations. First, there remains limited data from W/WC Africa, where the published literature does not cover Ivory and Gold Coasts. Thus, the analysis of genotype data is limited by the available published data.”  […] 

“Second, mtDNA is a single locus that can inform us only about group maternal ancestry and needs to be complemented with study of NRY and AIMs. While NRY analysis is complicated by limited resolution and coverage of the published data in Africa as well as Bantu speakers’ migrations.” (Stefflova et al., 2011, p.7)

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