Figure 1: Features distinguishing low-responsive (LR) and high-responsive (HR) fish.
From: A novel role for pigment genes in the stress response in rainbow trout (Oncorhynchus mykiss)

(A) Representative images of dermal pigmentation in LR (top panel) and HR (lower panel) individuals. (B) Sequence chromatograms from homozygous AA (top panel), heterozygous AC (middle panel), and homozygous CC (lower panel) individuals in strain-distinguishing melanocortin 1 receptor (MC1R)_paralog2 position 526. Relative expression of (C) melanocortin 2 receptor (MC2R) mRNA in head kidney is increased in high-responsive (HR) (n = 8) compared to low-responsive (LR) (n = 8) fish. mRNA expression levels are presented as fold change normalized to LR average = 1 (mean ± s.e.m; **p < 0.01, two-tailed t-test).