Figure 1.—

The circadian period variation in F₁ populations. Phenotypic distributions of F₁ progenies of N2 (A), N4 (B), and N6 (C) populations. The x-axis represents circadian period and the y-axis represents frequency of period in the corresponding F₁ progenies. Arrows indicate the periods of the parents for each cross. (D) Race tube images of conidial banding patterns under constant darkness (free-running condition). Two N6 parents (FGSC 4825 and FGSC 2223) and three representative progeny (N6 055, N6 103, and N6 144) with different free-running periods are shown. The vertical black lines represent the growing front in a 24-hr period. The number in parentheses is the average period of the strain.