23andMe is using a smaller chip, one with only 650,000 SNPs, he said, although some of the test sites are tailored to generate information about population ancestry.
Thus, while these small initial studies from Asian populations at least partially confirm some, but not all of the European GWAS results, not surprisingly, there are other findings that are unique to these populations based on their population ancestry.
Analyses of clustering, relationships of geographic sites as well as a Bayesian approach testing population ancestry provide evidence for past contraction into Pleistocene glacial refugia and NGSadmix shows subsequent population admixture.
The study, published today in Science, finds that "self-reported population ancestry likely provides a suitable proxy for genetic ancestry". In other words, someone saying he is of European ancestry will have genetic similarities to other Europeans.
Specifically, we asked if altitude, seasonal temperature, or seasonal precipitation differ for weather stations in anubis, yellow, or hybrid ranges in southern Kenya, and if land cover or altitude covary with population ancestry near the hybrid zone.
Our model incorporated the possibility that some individuals may have mixed population ancestry and the possibility that allele frequencies are correlated among populations due to migration or shared ancestry [51].
