I didn't have time or knowledge of more details yesterday on my post, but I learned a lot during the presentation. There is a LOT more information available for each reference population as AncestryDNA attempts to explain the medieval populations that our genes came from.
For reference purposes, here is my own estimated ethnicity based on my genealogical research, assuming geographic locations in about 1600 AD:
* 68% British Isles
* 24% Germany
* 1% Holland
* 1% France
* 6% Unknown (perhaps some are French, some are English)
Here is more detail about my own DNA origins:
1) On the "New Ethnicity Estimate Preview" page (available at this time to a limited number, perhaps 6,000 testers) are these charts and text (with the Europe West sub-region selected):
For each Reference Population (i.e., Europe West, Ireland, Great Britain, Scandinavia, Italy/Greece, and Iberian Peninsula for the Europe region), AncestryDNA provides a percentage for my deep DNA ancestry, including a range determined by analysis of the 40 different marker selections. As you can see, I have (according to AncestryDNA) about 66% Europe West, with a range from 37% to 94%.
Further down the page for Europe West are two bar graphs that show my DNA percentage compared to other populations. The first bar graph (in gold) compare my Europe West DNA with that of a typical current Europe West resident:
The lower graph on the screen above, in blue, provides examples of DNA percentage for people native to Europe West (apparently, native means all great-grandparents resided there). As you can see, my average DNA from Europe West (66%) exceeds that of the typical native (48%).
Further down the web page is another bar graph that indicates other regions that commonly have people "native" to Europe West:
Finally, the web page provides a short and concise history of migrations of the region (in this case Europe West) beginning in the BCE (Before the Common Era) time period, 2,000 to 3,000 years ago:
All of that is very helpful and interesting.
2) Here is the map and gold bar chart for my DNA percentage for Ireland:
I have 18% DNA from Ireland, with a range from 3% to 32%. Since I have no known ancestors from Ireland based on my genealogy research to date (there may be one or two 8th great-grandparents, but that's in the unknown category in my list), I'm guessing that a significant number of Ireland "natives" have British ancestry.
3) Here is the map and the gold bar chart for Great Britain:
According to AncestryDNA, I have 9% of my DNA from Great Britain, with a range from 0% to 31%.
The migration maps that they show for Great Britain describes the invasions of the Jutes, Angles, Saxons and Normans in medieval times that may explain some of my differences between genealogical and AncestryDNA percentages (including the Scandinavian 3%)..
3) So why does my "genealogical ancestry" and my "DNA ancestry according to AncestryDNA" differ so much? AncestryDNA says that it may be due to:
* the genetic influence of neighboring regions,
* the estimates are on the edge of their predicted range,
* the random nature of genetic inheritance,
* ethnicity estimation is still an unknown problem.
They provide a chart showing the average admixture between European sub-region in each sub-region:
For instance, persons identified as "native" to Great Britain have (approximately):
* 60% from Great Britain
* 13% from Europe West
* 10% from Ireland
* 8% from Scandinavia
* 2% from Iberian Peninsula
* 1% Italy/Greece
* 3% Unknown.
I'm still surprised by how high my Europe West (66%) percentage is relative to Great Britain and Ireland (27%). There are three possibilities here:
* The AncestryDNA estimates are correct, within the ranges shown.
* My genealogical research is incomplete and perhaps a significant part is wrong (it would take only one grandparent to completely disrupt my percentages!)
* The AncestryDNA estimates need further refinement.
I hope that other geneabloggers will post their AncestryDNA results when they receive them.
4) There is a lot more information on the AncestryDNA web pages - be sure to go explore when you have access to this Enhanced Ethnicity Estimate.
The URL for this post is: http://www.geneamusings.com/2013/09/first-look-at-my-ancestrydna-ethnicity_13.html
Copyright (c) 2013, Randall J. Seaver