Fig. 2

Zero-amplitude test results for circadian rhythms in unirradiated control mice. a DSP, sperm motility, and testosterone; b G6PDH, SDH, ACP, and LDH; c Clock and Bmal1; and d Ror-α, Ror-β, and Ror-γ. The circles represent the 95% joint confidence intervals of amplitude and acrophase. The pole (zero-point) of the polar coordinate was not overlapped by the circles, namely, the zero amplitude hypothesis was rejected because of p < 0.05, which indicates a distinct circadian rhythmicity of these reproductive markers and five clock genes expression