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Fig. 1 | BMC Evolutionary Biology

Fig. 1

From: Accelerated evolution at chaperone promoters among Antarctic notothenioid fishes

Fig. 1

Changes in HSE frequency bp− 1 at chaperone promoters across Perciformes. a A time-calibrated phylogeny of Perciform fishes drawn from Chang et al. 2019, including Nototheniodei and three non-perciform outgroups, is visualized. The scale key depicts a 50-million-year span. Nodes shaded in grey represent Perciform suborders, except in the case of Notothenioidei which is shaded in blue. The two major lineages of Cryonototheniodei are depicted in red and green. Circles at branch tips are colored according to the mean frequency of HSE motifs detected among chaperone promoters for a given species (light = low frequency; dark = high frequency). Circle sizes are scaled to the summed lengths of promoter sequences analyzed. All illustrations of fishes are public domain. b Bootstrapped effect size estimates for variation in HSE frequency bp− 1 among cryonotothens (Cryonotothen), subpolar notothens (Notothen) and other perciformes and outgroups (Other)

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