Health

Visualizing West Eurasia

Gene ExpressionBy Razib KhanJan 6, 2011 1:49 AM

Newsletter

Sign up for our email newsletter for the latest science news
 

Over at his blog Dienekes Pontikos has taken some public data sets and his own Dodecad samples and generated a massive MDS plot of West Eurasian populations. The MDS is fine as it goes. It illustrates clearly that when you visualize an individual on a plot defined by the two largest dimensions of variation in the total data set clusters naturally emerge. Some of of them are totally expected. For example, the cluster of Ashkenazi Jews. But, some of the relationships need to be interpreted with care. The similar position of Sicilians with Ashkenazi Jews does not mean that these two populations are identical. Rather, their ancestral components exhibit similarities in such a manner that in a representation constrained to a few dimensions they shake out similarly. You can view the full thumbnail by clicking it, but I thought that for purposes of intuitive comprehension it would be useful to "cut out" the outlines of the distributions, and label them by geography. I added Ashkenazi Jews because I thought readers would be interested, but omitted the other Jewish groups.

1 free article left
Want More? Get unlimited access for as low as $1.99/month
Already a subscriber? Log In or Register
1 free articleSubscribe
Want unlimited access?

Subscribe today and save 70%

Subscribe

Already a subscriber? Log In or Register
More From Discover
Recommendations From Our Store
Shop Now
Stay Curious
Join
Our List

Sign up for our weekly science updates.

 
Subscribe
To The Magazine

Save up to 70% off the cover price when you subscribe to Discover magazine.

Copyright © 2021 Kalmbach Media Co.