15
Oct

Which Gedmatch Admixture to Use

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Do you want to know which Gedmatch Admixture to use? In this post, you will learn how to choose which admixture calculator will work best for your unique ancestry, as well as how to choose the calculator model.

I highly recommend taking advantage of the Gedmatch Admixture tool. It’s a great way to get completely free “second opinions” about your ethnicity or ancestry estimate.

Plus, it’s just lots of fun!

What is Gedmatch Admixture?

For those who are reading this article and haven’t heard of Gedmatch Admixture calculators, you might wonder what this is all about.

There are several researchers who have made “calculators” based on their own collection of DNA data. We are able to run our DNA on Gedmatch through these calculators to get different ethnicity estimates.

In order to use the calculators, we must first upload our DNA to Gedmatch. Once we finish with the process of uploading, we can access the Gedmatch Admixture calculators on the DNA Application tool list.

Below, you can see exactly where to click to access the Gedmatch Admixture calculators:

Click on the Admixture (heritage) tool, as shown in the red rectangle above

How to choose a Gedmatch admixture calculator

In order to choose a Gedmatch admixture calculator, there are a few basic definitions we should all understand. Oracle? Calculator model? Projects? Chromosome painting?

Once you know a little bit more about the background of each project, it will be easy to understand which one will best suit your needs. This is because each project has a slightly different focus.

What are admixture “projects” on Gedmatch?

The very first choice you will have to make in order to use the Gedmatch admixture calculators is deciding between projects.

There are currently five projects that have calculators on Gedmatch. Below, you can find the list of projects as well as links to the project web pages and a short description of the project, when available.

You can use any of the projects even if your ancestry is not primarily made up of DNA from that region. It can be helpful to use one that specializes in the region or regions that interest you.

MDLP This calculator has a global focus and is a favorite for many people

Eurogenes A project that focuses on European DNA

Dodecad A project focusing primarily on those with European, Asian, or North African ancestry

HarrapaWorld This project focuses on Southeast Asian DNA

puntDNAL No website available, this project focuses on ancient DNA groups

EthioHelix A project focusing on the genetic populations of African , East African, and Ethiopian linguistics and history

GedrosiaDNA A project with a focus on Eurasian (Europe and Asia) and Sub-Saharan African DNA. There is no website currently available.

It is important to note that some projects are no longer maintained or updated, and others no longer have web pages associated with them. I’m grateful to Gedmatch for keeping the calculators on the site, since it allows us to experiment and learn more from our DNA.

Additionally, something that I have noticed with many of the project calculator models is that if your ancestry doesn’t match well with the focus of the project, the calculator will do its best to assign your DNA regions that are included in the results.

For example, I have no substantial ancestry from Africa, but if I run my DNA through the EthioHelix Africa-only calculator model, I will get results that assign my DNA to the available African regions. If I pick the Africa K10+French calculator, the results put more than 80% of my DNA as French, which is closer to accurate.

This is why it is best to choose a project and calculator model that best matches what you know about your heritage. The results of these calculators will likely vary from your ethnicity estimate received from your DNA testing company.

Top Gedmatch Admixture Calculators

When it comes to admixture calculators, the more specific the results, the higher the chance for error. This is true for Gedmatch calculators, and even for the results we get from our DNA testing company.

This means that you should experiment with a few different calculators from the same project in order to compare the results that you get. We can adjust how “specific” we want our results to be by choosing more or less population groups on our calculator model.

The number that comes after the “K” in the calculator is the number of populations that are included in the model. If we choose a higher number, we will get more specific results (and a higher chance for error). Lower population numbers will typically result in more accuracy.

To help you find a good starting place with experimentation with admixture calculators, the below list suggests the “best” admixture project/calculator combinations.

Best Gedmatch admixture calculator for African ancestry

If you have nearly all African ancestry and no European ancestry, then the recommended project/calculator is the EthioHelix K10 Africa Only calculator. Your results will assign your DNA to the ten available African regions.

If have African ancestry and also European, but you’d like to focus on African regions that show up in your DNA, you can choose the EthioHelix K10 + French model. If you use this model, much (or all) of your European ancestry will show up as French, which you can ignore. The rest of your DNA will be assigned to the ten African regions available on the calculator.

Best Gedmatch admixture calculator for European ancestry

If you have primarily European ancestry, the recommended project/calculator combination is Eurogenes K36 calculator. If you have European ancestry along with Ashkenazi Jewish heritage, you might try the Eurogenes Jtest model.

Best Gedmatch admixture calculator for Native American ancestry

My recommended Gedmatch Admixture calculator for Native American ancestry is the MDLP World 22. This is because it includes 22 world regions, including four Native American regions covering the continents of North and South America.

Best Gedmatch admixture calculator for Asian ancestry

If you have Asian ancestry, the HarrapaWorld calculator model is recommdned. If you have ancestry from non-Asian regions, the model will assign that DNA to those broad regions. This allows you to focus on the Asian regions on the calculator model.

Conclusion

I hope that this post gave you a good idea about where to start exploring your admixture on Gedmatch. If you have any questions about something that you read in this post, or if you would like to share what you learned on Gedmatch’s Admixture tools, please join us in the discussion below.

Thanks for stopping by today!

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