Fig. 2
Expression patterns of antennal patterning genes in B. mori. (a) Dll expression in the early pupal antenna. Dll is not detected in the olfactory epithelium. b Al expression (magenta) in the early pupal antenna. The olfactory epithelium is labeled by a sensory organ marker, Prospero (Pros; green) [50]. Al expression is observed just dorsal to the olfactory epithelium and overlap with Dll expression. c wg (magenta) and rho (green) expression in the early pupal antenna. rho is expressed in the olfactory epithelium, while wg expression is detected between them. d SEM image of a B. mori antenna showing a cross-section (adapted from [35] with modification). e A schematic of cross-sections of a developing antenna showing the process of lateral branch formation. al expression is represented by red color and the olfactory epithelium by a dotted pattern. Broken lines in (a-c) and arrowheads in (d, e) indicate the ventral midline. Scale bar in (d) represents 130 μm in (a-c) and 200 μm in (d)