Fig. 3: Effects of gene flow, historical glaciation and natural selection on diversity and differentiation of the estuarine oyster.
From: Genome of the estuarine oyster provides insights into climate impact and adaptive plasticity
a Nucleotide diversity (pi) in 11 geographic populations along the coast of China. b Demographic histories of three populations of the estuarine oyster (ar) (SC, MC and NC), and Pacific oyster (C. gigas or gi) inferred by Pairwise Sequentially Markovian Coalescent. Periods of the Mindel glaciation (MG, 0.68~0.80 mya), Riss glaciation (MG, 0.24~0.37 mya) and Würm glaciation (WG, 10,000~120,000 years ago) were shaded by yellow. c Nucleotide diversity (pi) of three populations of the estuarine oyster, and Pacific oyster (C. gigas). The data are presented as box plots; the central rectangle spans the first to third quartiles of the distribution, and the ‘whiskers’ above and below the box show the maximum and minimum estimates. The line inside the rectangle shows the median, the circles represent outliers. d The ratio of SNPs that are highly heterozygous only in northern (N_het) or only in southern (S_het) populations across 10 chromosomes. e The ratio of genes with non-synonymous SNPs in three oyster populations. Data are presented as circle plot, with each circle representing an individual oyster and bars showing the mean value ± SEM. Asterisks indicate significant difference (***p < 0.001). Error bars represent SEM values.
