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Ancestry Results of Someone Who's Predominantly West African
#1
My 23andme results:

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My FTDNA results:

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Neither 23andme nor FamilyTreeDNA indicates that I have ancestry from Mali. However, Vahaduo selects Bambara Malian and Malinke Malian samples to model the parts of my ancestry that it would otherwise use Mende, Yoruba, and more Igbo to model.

Without Bambara or Malinke samples:

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With Bambara and Malinke samples:

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#2
23andme and familytreeDNA are more accurate than Vahadou or g25.
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#3
(10-09-2024, 06:44 PM)masta Wrote: 23andme and familytreeDNA are more accurate than Vahadou or g25.

Yes, but why does Vahaduo select the Malian samples over Nigerian and Sierre Leone samples (Igbo, Yoruba, & Mende)?
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#4
(10-09-2024, 07:57 PM)Inquirer Wrote:
(10-09-2024, 06:44 PM)masta Wrote: 23andme and familytreeDNA are more accurate than Vahadou or g25.

Yes, but why does Vahaduo select the Malian samples over Nigerian and Sierre Leone samples (Igbo, Yoruba, & Mende)?

Because they have western Eurasian admixture like you
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#5
(10-10-2024, 07:06 PM)Genetics189291 Wrote:
(10-09-2024, 07:57 PM)Inquirer Wrote:
(10-09-2024, 06:44 PM)masta Wrote: 23andme and familytreeDNA are more accurate than Vahadou or g25.

Yes, but why does Vahaduo select the Malian samples over Nigerian and Sierre Leone samples (Igbo, Yoruba, & Mende)?

Because they have western Eurasian admixture like you

I figured that was a possibility. However, the Eurasian samples that I included in the sources should account for that. In the model that includes the Malian samples, you can see that 4.6% of my ancestry is modelled as European and 0.6% is modelled as Indigneous American.
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#6
(10-10-2024, 07:14 PM)Inquirer Wrote:
(10-10-2024, 07:06 PM)Genetics189291 Wrote:
(10-09-2024, 07:57 PM)Inquirer Wrote: Yes, but why does Vahaduo select the Malian samples over Nigerian and Sierre Leone samples (Igbo, Yoruba, & Mende)?

Because they have western Eurasian admixture like you

I figured that was a possibility. However, the Eurasian samples that I included in the sources should account for that. In the model that includes the Malian samples, you can see that 4.6% of my ancestry is modelled as European and 0.6% is modelled as Indigneous American.

Do you know roughly how much western Eurasian and European ancestry you are carrying? Also do you score ibm in Neolithic models
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#7
(10-14-2024, 03:22 AM)Genetics189291 Wrote:
(10-10-2024, 07:14 PM)Inquirer Wrote:
(10-10-2024, 07:06 PM)Genetics189291 Wrote: Because they have western Eurasian admixture like you

I figured that was a possibility. However, the Eurasian samples that I included in the sources should account for that. In the model that includes the Malian samples, you can see that 4.6% of my ancestry is modelled as European and 0.6% is modelled as Indigneous American.

Do you know roughly how much western Eurasian and European ancestry you are carrying? Also do you score ibm in Neolithic models

23andMe has determined that I'm 85.2% West African,  10.4% Congolese and Southern East African, 4.1% European, and 0.3% unassigned. So, I'm 4.4% Non-African overall, according to 23andme.

According to FTDNA, I'm 96% African and 4% European.

So, based on this information, I'm 4% to 4.1% European / Western Eurasian.

My parents are from the Caribbean, so the 0.6% of my ancestry that's modelled as Indigneous American could be a trace amount of Taino ancestry if it's real.

Here are my results from ExploreYourDNA's Standard Neolithic (Alwakeel) (Scaled) calculator. The Northwest African component corresponds to the Taforalt hunter-gatherers. 

   
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#8
interesting new paper about western african forced admixture in Gulf of Guinea Islands

Nested admixture during and after the Trans-Atlantic Slave Trade on the island of São Tomé
View ORCID ProfileMarta Ciccarella, View ORCID ProfileRomain Laurent, View ORCID ProfileZachary A Szpiech, View ORCID ProfileEtienne Patin, Françoise Dessarps-Freichey, José Utgé, Laure Lémée, View ORCID ProfileArmando Semo, Jorge Rocha, Paul Verdu
doi: https://doi.org/10.1101/2024.10.21.619344

Human admixture history is rarely a simple process in which distinct populations, previously isolated for a long time, come into contact once to form an admixed population. In this study, we aim to reconstruct the complex admixture histories of the population of São Tomé, an island in the Gulf of Guinea that was the site of the first slave-based plantation economy, and experienced successive waves of forced and deliberate migration from Africa. We examined 2.5 million SNPs newly genotyped in 96 São Toméans and found that geography alone cannot explain the observed patterns of genetic differentiation within the island. We defined five genetic groups in São Tomé based on the hypothesis that individuals sharing the most haplotypes are more likely to share similar genetic histories. Using Identical-by-Descent and different local ancestry inference methods, we inferred shared ancestries between 70 African and European populations and each São Toméan genetic group. We identified admixture events between admixed groups that were previously isolated on the island, showing how recently admixed populations can be themselves the sources of other admixture events. This study demonstrates how complex admixture and isolation histories during and after the Transatlantic Slave-Trade shaped extant individual genetic patterns at a local scale in Africa.
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