Figure 1.
Plumage colour phenotypes of the wild-type and mutant quail. A female of the WE strain exhibiting the wild-type plumage colour (A) and a female of the L strain exhibiting yellowish mutant plumage colour (B). Feathers around the chest (C,D) and the back (E,F). Colour patterns in feathers, such as spots and stripes, are unclear in the L strain (D–F), compared with the WE strain (C–E). Dark-coloured regions were observed in feathers of both strains; however, feather colour of the L strain was light and yellowish, compared with the WE strain. Scale bars, 50 mm in the left and middle panels, 10 mm in the right panel.