Figure 3 in Multi-locus analyses reveal four giraffe species instead of one

Figure 3. Population Structuring and Giraffe Divergence Times (A) STRUCTURE analysis of seven nuclear loci for 105 individuals. Vertical bars show the membership in a cluster for each individual. Separate colors represent separate clusters. K = 4 has the highest credibility and shows well-resolved groups: blue: southern cluster (South African plus Angolan giraffe); green: Masai giraffe; orange: reticulated giraffe; yellow: northern cluster of the remaining subspecies. K = 5 or higher shows no further resolution. (B) PCA axes 1–2 for four distinct giraffe clusters (1: southern; 2; northern; 3: Masai; 4: reticulated giraffe) according to STRUCTURE clusters (K = 4). The x axis explains 12.5% and the y axis 7.15% of variation. The oval outlines represent 95% confidential intervals and are colored after STRUCTURE clusters. Nonoverlapping frames denote significantly different clusters. Analyses along axes 1–3 (data not shown) produced nearly identical results. (C) Divergence times among giraffe species estimated by BEAST to 1.99, 1.89, and 1.25 mya, respectively. (D) Time-calibrated phylogenomic analysis based on 540,000 bp of protein coding sequences. The divergence time of Giraffidae was estimated at 28.7 mya. See also Figure S3 and Table S2.