Fig. 3. Mild and strong fms-dependence of hybrid pigment patterns for D. `hikari' and D. choprae. (A,B) Danio `hikari' hybrids. (A) Wild-type control hybrids develop distinctive melanophore stripes and interstripe regions (arrow, A), whereas fms mutant hybrids have about half as many xanthophores as controls (B). (C-F) Danio choprae hybrids at larval stages. (C,E) Wild-type control hybrids have numerous xanthophores both on the body (arrow, C) and in the fins (arrowheads, E). (D,F) fms mutant hybrids have fewer xanthophores than controls. (G,H) Adult D. choprae control hybrids (G) have more xanthophores (arrows) than tester fms mutant hybrids (H). Scale bars: in A, 500 µm for A,B,G,H); in C, 150 µm for C-F.