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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Similar patterns of genetic diversity and linkage disequilibrium in Western chimpanzees (Pan troglodytes verus) and humans indicate highly conserved mechanisms of MHC molecular evolution

Fig. 2

Genetic diversity indexes estimated in chimpanzee cohorts and human populations. Left panels: allelic richness (top), heterozygosity (middle) and nucleotide diversity (bottom) at the seven studied MHC loci in the pooled cohort of chimpanzees (in red) and averaged on multiple human populations (in blue). The pooled cohort includes all cohorts except Texascb. Middle panels: allelic richness (top), heterozygosity (middle) and nucleotide diversity (bottom) at the seven studied MHC loci in each cohort of chimpanzees (in red) and for the human populations (in blue) represented as violin plots. The values calculated for each chimpanzee cohort are indicated by filled and unfilled shapes for cohorts of wild-born and captive-born chimpanzees, respectively. The values calculated for the human populations (average number of k = 70 (s.d 15.9) samples of average size N = 109.2 (s.d 17.31)) are shown as violin plots. The width of the violin varies so as to represent the probability density of the data, the thick black bar in the centre represents the interquartile range, the thin black line extended from it represents the 95% confidence intervals, and the blue dot is the median. Right panel: allelic richness (top), heterozygosity (middle) and nucleotide diversity (bottom) at the seven studied MHC loci in each cohort of chimpanzees (in red) and for the human populations (in two shades of blue) represented as violin plots. The values calculated for each chimpanzee cohort are indicated by filled and unfilled shapes for cohorts of wild-born and captive-born chimpanzees, respectively. The values calculated for the human population are plotted as violin plots, in light blue for small sized and isolated populations that likely experienced rapid genetic drift (RGD) and in dark blue for large outbred populations with slow genetic drift (SGD).

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