Fig. 4.
Fine-scale genetic structure exists in NXH people. (A) The geographical distribution of NXH samples. The small panel in the top left indicates the location of Ningxia in China. Ningxia could be divided geographically into the southern and northern regions, which is indicated with different colors. The regions from which samples were collected were labels on the right side. Each point represents one sample. The dark lines indicate the Silk Road across Ningxia. Map boundary data from National Catalogue Service for Geographic Information (http://www.webmap.cn). (B) The phylogenetic tree of all the 230 NXH samples inferred by fineSTRUCTURE. The samples were colored based on the geographical region from which they were collected. (C) The neighbor-joining phylogenetic tree of Hui samples from different regions in Ningxia, Xinjiang (XJH), and Dungan based on pairwise FST. The bootstrap values based on 100 replicates are shown. The samples in Ningxia are grouped based on the regions from which they were collected. The regions were colored as in the legend. (D) The genetic proportion of western ancestry in Hui samples in different regions and Han samples based on ADMIXTURE for Eurasian populations assuming two ancestries.