cyna
04-26-2014, 02:02 PM
I asked Davidski to take a look at my AncestryDNA raw data. Ancestry tests more ancestral SNPs than 23andme, so I figured I would get better coverage with that set of data. Here is what Davidski said:
----------------------------------------------------
- Begin Analysis -
European 39.5%
Amerindian 1.1%
Southeast_Asian 8.7%
Sub-Saharan Africa 50.7%
TOTAL 100%
British 15.9%
Norse 13.9%
European_Jewish 9.7%
Amerindian 1.1%
Southeast_Asian 8.7%
Sub-Saharan Africa 50.7%
TOTAL 100%
Alright, here we go. Normally I send out a lot of PCA and various maps, and I already sent you a few, but I don't think that stuff is very useful in your case.
For instance, if I break up your genome into four presumably unadmixed grandparents, then these four land in western Nigeria, Denmark and eastern Kazakhstan. This is obviously impossible, since Southeast Asian and Amerindian ancestry, which you carry, isn't native to these regions. Indeed, you also appear to be partly of central and southern European Jewish origin, which further makes the initial classification highly unlikely.
So I've put together a couple of graphics showing your ancestry proportions (you can see the details in the relevant text file). The first one tackles continental ancestry, and in my opinion shows very robust results. On the other hand, the second one attempts to characterize in more detail your European ancestry, and is somewhat speculative. That's because most European groups are very closely related, and it's difficult to break them up based on DNA alone.
From memory, you said that 23andMe and Ancestry gave you very little Scandinavian ancestry. In the end I came up with 13.9%, and I think that's a reasonable figure, because I picked up Scandinavian signals in your genome in almost all of the tests I ran. However, many of your Northwest European haplotypes appear to be of Scottish origin, so perhaps Norse-like Scottish ancestry is inflating the figure? In any case, your Northwest European ancestry is in large part from around the North Sea. The Norse is probably not recent, but I couldn't help putting it in there because Norway lights up in all the tests. Actually, it was obvious you were part Scottish after I did the full scan, but I reckon your Scottish ancestor must have come from an area of Scotland with lots of Norse influence.
Your Jewish ancestry seems to be mostly, but not entirely, Ashkenazi. The reason I say that is because 10% of Ashkenazi admixture is easy to pick up in my tests. On the other hand, the signals in your case were a bit muffled, and you were coming out partly Italian and Spanish in some analyses. This might well be true to some extent, but I suspect that you have Sephardic and other southern European Jewish ancestry, in addition to the aforementioned Ashkenazi ancestry. However, it's very difficult to come up with precise figures in this case. The best I can do is give you a highly speculative estimate for your Jewish/southern ancestor; 3/4 Ashkenazi and 1/4 Sephardic. The problem here is that Sephardic Jews aren't as drifted genetically as Ashkenazis, so it's very difficult to tell them apart from southern Europeans. They're very similar to Italians and Iberians, and indeed you can be fitted as part Iberian and Italian.
The Southeast Asian admixture in your genome is also difficult to place precisely. You share very few haplotypes with Southeast Asians that I was able to compare you with, but those you did share anything with were from Vietnam and southern China. So I'd say your Southeast Asian ancestors came from around that area, or not too far away. Based on the data alone, northern Vietnamese are your best fit. But South Han Chinese are next. I don't know the history of Vietnam too well, but I do know that there were Chinese communities all over Indo-China. Maybe they came from Hong Kong or nearby?
- End of Analysis -
------------------------------------------------------------------------
I have to say that he nailed my ancestry closer than any other service. I am very pleased with his product. A step up from the venerable McDonald, IMO, because he goes into a great deal more detail. I also suspect the quality control is a bit better, as he worked on my profile for about 5 or 6 days, whereas McDonald tends to churn out the reports quickly because of the volume of requests (you get what you pay for). The only thing McDonald offers in excess is the full Chromosome painting, but I think you could ask Davidski for one by request. Anyway, here is how to order a report from Davidski:
http://bga101.blogspot.com.au/2014/03/eurogenes-genetic-ancestry-detective.html
----------------------------------------------------
- Begin Analysis -
European 39.5%
Amerindian 1.1%
Southeast_Asian 8.7%
Sub-Saharan Africa 50.7%
TOTAL 100%
British 15.9%
Norse 13.9%
European_Jewish 9.7%
Amerindian 1.1%
Southeast_Asian 8.7%
Sub-Saharan Africa 50.7%
TOTAL 100%
Alright, here we go. Normally I send out a lot of PCA and various maps, and I already sent you a few, but I don't think that stuff is very useful in your case.
For instance, if I break up your genome into four presumably unadmixed grandparents, then these four land in western Nigeria, Denmark and eastern Kazakhstan. This is obviously impossible, since Southeast Asian and Amerindian ancestry, which you carry, isn't native to these regions. Indeed, you also appear to be partly of central and southern European Jewish origin, which further makes the initial classification highly unlikely.
So I've put together a couple of graphics showing your ancestry proportions (you can see the details in the relevant text file). The first one tackles continental ancestry, and in my opinion shows very robust results. On the other hand, the second one attempts to characterize in more detail your European ancestry, and is somewhat speculative. That's because most European groups are very closely related, and it's difficult to break them up based on DNA alone.
From memory, you said that 23andMe and Ancestry gave you very little Scandinavian ancestry. In the end I came up with 13.9%, and I think that's a reasonable figure, because I picked up Scandinavian signals in your genome in almost all of the tests I ran. However, many of your Northwest European haplotypes appear to be of Scottish origin, so perhaps Norse-like Scottish ancestry is inflating the figure? In any case, your Northwest European ancestry is in large part from around the North Sea. The Norse is probably not recent, but I couldn't help putting it in there because Norway lights up in all the tests. Actually, it was obvious you were part Scottish after I did the full scan, but I reckon your Scottish ancestor must have come from an area of Scotland with lots of Norse influence.
Your Jewish ancestry seems to be mostly, but not entirely, Ashkenazi. The reason I say that is because 10% of Ashkenazi admixture is easy to pick up in my tests. On the other hand, the signals in your case were a bit muffled, and you were coming out partly Italian and Spanish in some analyses. This might well be true to some extent, but I suspect that you have Sephardic and other southern European Jewish ancestry, in addition to the aforementioned Ashkenazi ancestry. However, it's very difficult to come up with precise figures in this case. The best I can do is give you a highly speculative estimate for your Jewish/southern ancestor; 3/4 Ashkenazi and 1/4 Sephardic. The problem here is that Sephardic Jews aren't as drifted genetically as Ashkenazis, so it's very difficult to tell them apart from southern Europeans. They're very similar to Italians and Iberians, and indeed you can be fitted as part Iberian and Italian.
The Southeast Asian admixture in your genome is also difficult to place precisely. You share very few haplotypes with Southeast Asians that I was able to compare you with, but those you did share anything with were from Vietnam and southern China. So I'd say your Southeast Asian ancestors came from around that area, or not too far away. Based on the data alone, northern Vietnamese are your best fit. But South Han Chinese are next. I don't know the history of Vietnam too well, but I do know that there were Chinese communities all over Indo-China. Maybe they came from Hong Kong or nearby?
- End of Analysis -
------------------------------------------------------------------------
I have to say that he nailed my ancestry closer than any other service. I am very pleased with his product. A step up from the venerable McDonald, IMO, because he goes into a great deal more detail. I also suspect the quality control is a bit better, as he worked on my profile for about 5 or 6 days, whereas McDonald tends to churn out the reports quickly because of the volume of requests (you get what you pay for). The only thing McDonald offers in excess is the full Chromosome painting, but I think you could ask Davidski for one by request. Anyway, here is how to order a report from Davidski:
http://bga101.blogspot.com.au/2014/03/eurogenes-genetic-ancestry-detective.html