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пятница, 24 августа 2018 г.

Global25 workshop 3: genes vs geography in Northern Europe

To produce the intra-North European Principal Components Analysis (PCA) plot below, download this datasheet, plug it into the PAST program, which is freely available here, then select all of the columns by clicking on the empty tab above the labels, and choose Multivariate > Ordination > Principal Components.



Of course, if you’re in the possession of your own personal Global25 coordinates, you can add yourself to this plot. Please keep in mind, however, that the vast majority (>90%) of your ancestry must be from north of the Alps, Balkans and Pyrenees to receive a sensible outcome. Also please ensure that all of the columns in the datasheet are filled out correctly, including the group column, otherwise your position on the plot will be skewed.
See also…
Global25 workshop 1: that classic West Eurasian plot
Global25 workshop 2: intra-European variation
Global25 PAST-compatible datasheets
Modeling genetic ancestry with Davidski: step by step

Source


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