Fig. 1From: Signatures of positive selection in the cis-regulatory sequences of the human oxytocin receptor (OXTR) and arginine vasopressin receptor 1a (AVPR1A) genesRegressions tree of the 122 SNPs on OXTR regressing on the 14 human populations from 1000genomes. The regression trees shows the SNPs (nodes) according to which the 14 population do separate from each otherBack to article page