Fig. 2: Quantitative trait locus (QTL) mapping of body color divergence between O. woworae and O. celebensis.

a Representative images of adult males and females of the parental species. b Logarithm of the odds (LOD) scores plotted against the chromosomal position on each linkage group. For reflectance values, the different colors indicate the relative contributions of a particular spectral range (red, 605–700 nm; yellow, 550–625 nm; blue, 400–510 nm; violet, 300–415 nm) to the total brightness. The dashed lines indicate the genome-wide significance thresholds determined by 1000 permutation tests (α = 0.05). Significant QTLs are summarized in Supplementary Table 2. c, d Effect plots of the significant QTLs for the red pectoral fins. The X axis indicates the genotypes at each QTL: C/C, homozygous for the O. celebensis allele; W/W, homozygous for the O. woworae allele; C/W, heterozygote. Sample sizes are shown in the parenthesis. The Y axis indicates the percentage of fish with red pectoral fins (c) or the contribution of the red spectral range (605–700 nm) to the total brightness (d). d Each dot represents each individual. The blue and brown colors indicate males and females, respectively. In the box-plots, the center line indicates the median, box limits indicate the upper and lower quartiles, the whiskers indicate 1.5× interquartile range, and the points are outliers. Sample sizes are shown in the parentheses. Source data are provided as a Source Data file.