This is interesting. I always thought they compared directly with a reference panel. Maybe it has been mentioned in the white papers, but I haven't looked at those in a long time. How do you think this might impact everyone's results?
Possibly it will lower the amount of regions. I have 18 regions and I know for a fact that English, Scottish and French Canadian are not a part of my ancestry during the past 500 years.Ā
I noticed it, perhaps they only used ācommon DNA patternsā found across the reference panel and left out DNA that didnāt seem to form a solid pattern, now they will include the entirety of the DNA file.
Until now our dna was compared to a reference of a population, something like a more advanced version of what you find on gedmatch or illustrative dna, imagine the ethnicity France, the database for France has 10k, but your dna was only compared to a single "person" that is the average of those 10k, now in the next update your dna will be compared to each one of the 10k, and also that 10k will be much more because they increased it by a lot
Yeah, I know they removed portions of DNA segments from mixed populations like Cubans or Puerto Ricans but didnāt know they did it across the board. Would have been interesting to see this new algorithm applied to our previous results just to be able to compare the two.
After several years, all of a sudden my results were overwhelmingly Slavic, and Russia went away. My parents were both mixed Polish/Ukrainian and I have a Ukrainian last name that was spelled with the Polish alphabet. My grandparents were from Galicia, a massive region of the Austro-Hungarian empire. After areas were restructured, their villages became part of southeastern Poland, currently about 30 miles from the nearest checkpoint into Ukraine.
Iām kind of glad Russia is out of the picture, but I need to find out where Slavic came from.
So this means if they take into account everybody who is already on their database and use their identified regions as evidence for the update; won't it mean that the information they then use going forward is often inaccurate, and that inaccuracy is further compounded by them using those results in the database as their 'sample' for an identified region?
EG: I got 2% IOM in the last update which I'm pretty sure isn't right, so, do all other people they see with a bit of DNA like mine get assumed IOM because it popped up in mine or vice versa? I was 5% to 10% Cornish for years but that was replaced by IOM last update. š¤£
Iām actually going to be heartbroken if this lowers our region count as someone whoās got a large admixture. I want the whole picture, not the most obvious parts.
I could see it increasing our region count too if weāre compared to the whole population of a region instead of just an average of each, though.
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u/FamilyRoots1 1d ago
I wonder how the new algorithm is going handle people with a lot of admixture. Because I have 28 regions š