Reading the Past in Ancient Irish Genomes [YouTube]
Posted on 12/28/2015 10:03:28 PM PST by SunkenCiv
The team sequenced the genome of an early farmer woman, who lived near Belfast some 5,200 years ago, and those of three men from a later period, around 4,000 years ago in the Bronze Age, after the introduction of metalworking. Their landmark results are published today in international journal Proceedings of the National Academy of Sciences, USA.
Ireland has intriguing genetics. It lies at the edge of many European genetic gradients with world maxima for the variants that code for lactose tolerance, the western European Y chromosome type, and several important genetic diseases including one of excessive iron retention, called haemochromatosis...
These ancient Irish genomes each show unequivocal evidence for massive migration. The early farmer has a majority ancestry originating ultimately in the Middle East, where agriculture was invented. The Bronze Age genomes are different again with about a third of their ancestry coming from ancient sources in the Pontic Steppe.
"There was a great wave of genome change that swept into Europe from above the Black Sea into Bronze Age Europe and we now know it washed all the way to the shores of its most westerly island," said Professor of Population Genetics in Trinity College Dublin, Dan Bradley, who led the study, "and this degree of genetic change invites the possibility of other associated changes, perhaps even the introduction of language ancestral to western Celtic tongues."
...Whereas the early farmer had black hair, brown eyes and more resembled southern Europeans, the genetic variants circulating in the three Bronze Age men from Rathlin Island had the most common Irish Y chromosome type, blue eye alleles and the most important variant for the genetic disease, haemochromatosis.
(Excerpt) Read more at popular-archaeology.com ...
Reading the Past in Ancient Irish Genomes [YouTube]
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BTTT.
Thanks OddLane, will have to ping this later.
Interesting stuff.
I had Ancestry.com sequence my DNA, and found out that my ancestors came from all over Europe, as well as Asia and Africa.
Excessive iron retention runs in my family. I guess that means my bones won’t turn to powder, they will rust away. May make good clubs though.
:’) My ancestors were farmers, probably right back to the Neolithic, and during the post-Roman times were probably peasants held by whatever iron-fisted *-word held the nearest castle. And indentured servitude can be found on both sides of the family. :’)
Shillelaghs. :’)
Over here.
I have just a small portion of Irish ancestry, but I think I’ve got the iron thingy.
It’s been mentioned to me several times that my blood tests show abnormally high concentration of iron and that’s one thing I have never supplemented.
Of course growing up just about everything I ate came from a cast iron skillet.
Ironland.
The Irish came from the Middle East?
So my wife is from Ireland not china? She has both those problems as do many chinese.
Long story short: We Irish* are pretty much mutts.
*Yes, I’m American first, but call myself Irish. Deal with it.
How trustworthy do you believe their analysis to be?
My siblings and I had well water with a high iron content for a substantial part of our younger years. Plus the iron pots and skillet!
The DNA analysis itself, trustworthy. The interpretation in terms of ethnic origins, not so much. Pricey experiment -- get your ethnic origins tested by Ancestry.com, 23andMe, and FTDNA. Compare the results.
One of these days, I might do that.
The analysis of ethnicity is based on statistical analysis of the frequency of specific alleles, and how those alleles have been observed to be distributed throughout the population. The reliability of those analyses is based on how many members of specific ethnic groups have been used in the original determination of allele frequencies in those groups. Obviously, the more members of each group submit to analysis, the more reliable the results become.
I am curious as to how the other DNA analysis companies would classify my ethnic origins.
Also, Ancestry.com asks people to upload their results from 23andMe, presumably to compare and analyze differences so as to provide a more reliable service.
“How trustworthy do you believe their analysis to be?”
Sorry, I forgot to ping you to my reply.
http://www.freerepublic.com/focus/chat/3377555/posts?page=18#18
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