Results showed that individuals coming from the same region, or speaking the same language had great genetic similarities, and Asia was populated through a single migration from the south.
“It seems likely from our data that they entered South East Asia first – making these populations older [and therefore more diverse],” a leading member of the consortium Edison Liu said.
that ppl from the same region or speaking the same language should tend to share great genetic similarities should surprise no one. this next part was interesting to me tho.
“So although the Chinese population is very large, it has less variation than the smaller number of individuals living in South East Asia, because the Chinese expansion occurred very recently, following the development of rice agriculture – within only the last 10,000 years.”
i’m not sure if i would have expected that. china has an array of different dialects and ethnicities, and i would have thought that would contribute to diversity. apparently, it doesn’t. at least not much genetically.
finally, one of the researchers says the findings were a “reassuring social message,” which “robbed racism of much biological support.” that’s a nice sentiment, but is it really that assuring? they’ve found that within a rather short amount of time (geologically), 10,000 years, a number of groups had diverged significantly enough that scientists could easily guess their region of origin or their spoken language. yes, we all came from one population, but now apparently we’re demonstrably different genetically. hmm. i’m not feeling especially reaassured.
UPDATE: here’s a graph from that study i saw on gnxp.