Topics

DNA testing #dna


roberto_d@...
 

I have had DNA testing in the past with Family Tree to investigate my Jewish origins. I have noticed that they have changed they way they calculate the proportion of Jewish DNA. 

Which company has the most accurate/reliable testing for Jewish origins?

Roberto D'Angelo
Australia


Adam Cherson
 

Have you tried running your own admixture studies using gedmatch? If this is something new to you:  you can take your FTDNA raw data, upload into gedmatch (for free) and use a variety of models to examine your Hebraic/Jewish proportions in relation to other modern groups. Depending on the model you use you are going to get different results. After years of exploring this topic I believe the most reliable model is something called genography, which uses ancient dna to determine proportions of ancient Hebraic, Anatolian, and other such ethnicities. Genography is not available on gedmatch or any other company. You either have to do it yourself, or hire a researcher to run the studies for you.

Adam Cherson


stephen@...
 

All of the major companies are accurate and reliable. Those of who are predominant Ashkenazi will get 100% or close to that from Ancestry, FTDNA and 23andMe. With MyHeritage you are likely to get some of your percentages classified as Sephardi, Southern Italian, North African, etc. For those who have a small percentage of Jewish you need to understand how each company divides up the geographic areas and the ethnic groups and how they title them, to make sense of your results. It often makes sense to compare your ethnicity across the 4 major companies. If you are keen to find relatives you should be on all 4. The major companies are continually improving and updating their ethnicity estimates, therefore what you get today is like to be different from what you will get in two years time. Where more work is being done is localities where it is difficult to differentiate the Jewish ethnicity from the wider population. For example, MyHeritage gives about 5% Southern Italian. Is this really Italian, or some Sephardi or ancient Jewish. 
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Stephen Schmideg
Melbourne, Australia
stephen@...


Robert Hanna
 

From my experience, MyHeritage is least accurate.  They claim I have a small percentage from Central America.  Not even close.  It's possible that ancestors way, way back emigrated to Central America and descendants have had their DNA tested with MyHeritage.  But that doesn't make my roots any amount of Central American.  Ancestry has the largest database, so they are apt to be more accurate.  They peg me as 100% Eastern European Jew.  All four of my grandparents and two of my great grandparents emigrated to the US (New York) from Eastern Europe.

Robert Hanna
NYC


Sarah L Meyer
 

They seem fine, but each company has its own reference populations and own algorithms.  For a while FTDNA had me with a small percentage of North American.  They have since removed it and I am back at 100% AJ.  The trace percentages are often just noise REGARDLESS of the company.  All of the companies use a least squares technique.  The fit the biggest piece and remove that data then they fit the next biggest etc.  By the time that you are down to the trace regions there is not much data left to fit and wild results may occur.
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Sarah L Meyer
Georgetown TX
ANK(I)ER, BIGOS, KARMELEK, PERLSTADT, STOKFISZ, SZPIL(T)BAUM, Poland
BIRGARDOVSKY, EDELBERG, HITE (CHAIT), PERCHIK Russia (southern Ukraine) and some Latvia or Lithuania
https://www.sarahsgenies.com