Post by Διαμονδ on Mar 23, 2018 22:59:58 GMT
Irish DNA Atlas has a lot of information about Ireland and the genetic differences within. Here are some of my own observations and relevant data from the study: www.nature.com/articles/s41598-017-17124-4
"The Irish population can be divided in 10 distinct geographically stratified genetic clusters; seven of ‘Gaelic’ Irish ancestry, and three of shared Irish-British ancestry.In addition we observe a major genetic barrier to the north of Ireland in Ulster. Using a reference of 6,760 European individuals and two ancient Irish genomes, we demonstrate high levels of North-West French-like and West Norwegian-like ancestry within Ireland. We show that that our ‘Gaelic’ Irish clusters present homogenous levels of ancient Irish ancestries. We additionally detect admixture events that provide evidence of Norse-Viking gene flow into Ireland, and reflect the Ulster Plantations."
This dendrogram shows that all of Ireland clusters together, with the exception of the Northern Ireland cluster consisting of people of mixed Irish and British ancestry, and that Scotland clusters with the rest of Britain by comparison.
Of the Irish clusters, Munster in far southern Ireland and the Gaelic Ulster cluster seem most divergent from the rest of the island, possibly reflecting greater isolation from Britain. Contrary to expectations of many, Connacht in far western Ireland is most similar to Leinster and to the Dublin cluster. Ireland's clusters appear to fall neatly within the provincial boundaries, because Irish provinces' borders were formed based on clans and tribes.
"The Ulster cluster itself shows the greatest genetic distance from Britain, in both our PCA and Fst analysis, despite its geographic proximity to Britain. Given that we have identified groups within the north of Ireland that do have genetic links to Britain, i.e. the N Ireland clusters, Ulster most likely represents individuals of ‘Gaelic’ ancestry that have remained genetically isolated from Britain – which reflects the demographic and political history of the region."
No one in Ireland is close to Basques or Spaniards. People often say that western Ireland is a hotbed of Basque-like individuals, but this is not true. All Irish are closer to the British than to anyone else, and western Ireland does not have any more "southern" ancestry than the rest of the island, AND on top of that, Connacht in western Ireland is genetically closer to people in Leinster and Dublin on the east coast.
French-like ancestry is highest in Ireland and the parts of Britain with less Anglo-Saxon input (Cornwall, western England, and SW Scotland). Ireland is differentiated form Britain (including most Scots) due to having less German-like ancestry and more Scandinavian ancestry. Here, we see that the Ulster and South Munster clusters have the least input that is neither French-like nor Scandinavian-like, implying less input from Britain than the rest of Ireland.
"The Irish population can be divided in 10 distinct geographically stratified genetic clusters; seven of ‘Gaelic’ Irish ancestry, and three of shared Irish-British ancestry.In addition we observe a major genetic barrier to the north of Ireland in Ulster. Using a reference of 6,760 European individuals and two ancient Irish genomes, we demonstrate high levels of North-West French-like and West Norwegian-like ancestry within Ireland. We show that that our ‘Gaelic’ Irish clusters present homogenous levels of ancient Irish ancestries. We additionally detect admixture events that provide evidence of Norse-Viking gene flow into Ireland, and reflect the Ulster Plantations."
This dendrogram shows that all of Ireland clusters together, with the exception of the Northern Ireland cluster consisting of people of mixed Irish and British ancestry, and that Scotland clusters with the rest of Britain by comparison.
Of the Irish clusters, Munster in far southern Ireland and the Gaelic Ulster cluster seem most divergent from the rest of the island, possibly reflecting greater isolation from Britain. Contrary to expectations of many, Connacht in far western Ireland is most similar to Leinster and to the Dublin cluster. Ireland's clusters appear to fall neatly within the provincial boundaries, because Irish provinces' borders were formed based on clans and tribes.
"The Ulster cluster itself shows the greatest genetic distance from Britain, in both our PCA and Fst analysis, despite its geographic proximity to Britain. Given that we have identified groups within the north of Ireland that do have genetic links to Britain, i.e. the N Ireland clusters, Ulster most likely represents individuals of ‘Gaelic’ ancestry that have remained genetically isolated from Britain – which reflects the demographic and political history of the region."
No one in Ireland is close to Basques or Spaniards. People often say that western Ireland is a hotbed of Basque-like individuals, but this is not true. All Irish are closer to the British than to anyone else, and western Ireland does not have any more "southern" ancestry than the rest of the island, AND on top of that, Connacht in western Ireland is genetically closer to people in Leinster and Dublin on the east coast.
French-like ancestry is highest in Ireland and the parts of Britain with less Anglo-Saxon input (Cornwall, western England, and SW Scotland). Ireland is differentiated form Britain (including most Scots) due to having less German-like ancestry and more Scandinavian ancestry. Here, we see that the Ulster and South Munster clusters have the least input that is neither French-like nor Scandinavian-like, implying less input from Britain than the rest of Ireland.
