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mandag 19. november 2012

Looking again at Fennoscandia

This is a further local study of the Fennoscandian participants using the previous Chromopainter analysis data.


As we can see here the Finns and Saamis clearly deviate from each other in this "local" analysis. This is something we also have seen in earlier MDS analysis. In earlier analysis using wider population panels Saamis and Finns have shown a tendency to be close to each other as regional differences is emphasised more in such analysis. We also see the same in this analysis as the Saamis and Finns share the largest branch with each other opposite to Scandinavians. What appears to be East-Finns (Finn1) and North-Saamis appear to be most distant to Scandinavians.

South-Saamis and Scandinavians

The difference between this analysis and previous similar MDS analysis is that the software to larger degree is able to differentiate the different groups. The Saamis appears much the same as in previous analysis but what is interesting here is what appear to be South-Saami influence on Scandinavians especially Swedes and to some parts Finns too "from" SWE7 in particular.

SWE7 appears to have a special position. This indvidual appears to show strongest affiliation with the subgroup of Scandinavians in particular Swedes that appears to show South-Saami admixture and to much lesser degree to "normal" Scandinavians. The intermediate position of SWE7 between North-Saami and Scandianvians also seem to suggest SWE7 is some kind of North-Saami and Scandinavian admixture but this is not supported when comparing to NO6 and NO7 who appear to be straightforward Scandinavian-North-Saami admixted individuals. Actually SWE7 appears to be much less affiliated with the North-Saamis than NO6 and NO7. So SWE7's pull away from Scandinavians cant therefre be explained directly as direct North-Saami like admixture.

Software not able with current resolution to detect obvious Saami admixture in some Finns

However the software have not been able to detect obvious Saami influence on FI26 and FI5 among Finns that is very observable on the PCA plot as a strong pull toward the North-Saami individuals also seen in the CC raw heatmap. It may be due to the fact that Finns and Saamis are closer to each other than Scandinavians.


We also see that Finns splinter into 3 Finn only groups and 2 Finns joined into a mixed group. Finn1 group appears to be East-Finns, Finn2 appears to be West-Finns and Finn3 group appears to also be a West-Finn group. The third mixed group containing two Finns appears to be a group that appear to share branch with the Saamis and the South-Saamis influenced individuals in particular.

Heatmaps and PCA plots

ChunkCount Aggregated

ChunkCount Populations Aggregated
ChunkCount Raw Aggregated
ChunkCount PCA Populations Aggregated
ChunkCount PCA Populations Aggregated

(To view images, click and copy image to MS Paint or similar program.)

2 kommentarer:

  1. Why the special group for us? Does this mean that I'm some sort of a viking?

  2. Not neccessarly. You are still very much Finnish but are closer to Scandinavians than the other two Finns groups. You also appear to be closer to the South-Saami influenced Swedish group, but lack the North-Saami similarity East-Finns have.