Figure 2

Dorsal fin phenotype in F2 hybrid. (a–h) Lateral views of the dorsal region [three representative variations of dorsal-finless mutants with bifurcated caudal fins (a–f) and wildtype (g, h)]. Numbers in the lower left corner indicate the number of dorsal fin rays including serrated dorsal fin spine and poste-serrated dorsal fin spine rays (please see text in details). Panels of (b), (d), (f), and (h) are magnified views of (a, c, e, and g), respectively. (i, j) Histograms of distribution patterns of dorsal fin ray number of chdS^wt/E127X and chdS^E127X/E127X genotypes. (i) 2020–0511-06RAWT clutch, (j) 2021–0406-01-RAWT clutch). Green-colored dotted vertical line indicates the 17 dorsal fin ray number (the boundary of wild-type and mutant phenotype; see text).