Figure 1

Tail dichromatism in Nothobranchius fish. A: The yellow morph of N. furzeri has a spotted tail with a sub-marginal yellow band and a marginal black band [Photo by Alexander Dorn]. N. kadleci have a solid red tail in general and sometimes with bluish spots in the proximal region. B: Corresponding yellow and red tail portions were clipped for RNA isolation. C: The yellow band of N. furzeri contains the yellow xanthophores almost exclusively, whereas the corresponding portions in N. kadleci have the black melanophores and red erythrophores (magnification, 10x). D: Hierarchical clustering of expression profiles derived from four RNA-seq pools of yellow (Y1 – Y4) and four pools of red (R1 –R4) tail samples. The profiles of samples correspond with the yellow and red tail phenotypic categories.