Table 2.

Effect of visual mutations on the period of rhythmic cryb flies in constant light

Genotype 500 luxa 50 lux 5 lux 0.5 lux
cryb ss 25.4 ± 0.1 25.0 ± 0.5 24.0 ± 0.3 23.4 ± 0.3
w; cryb ss 25.3 ± 0.1 ND ND ND
w; GMR-hid; cryb ss 23.6 ± 0.1 23.3 ± 0.1 23.4 ± 0.1 ND
w; gl60j cryb 23.8 ± 0.1 23.7 ± 0.2 23.5 ± 0.1 23.7 ± 0.1
w norpAp24; cryb ss 23.1 ± 0.1 ND ND ND
  • Periods were obtained from periodogram analysis for flies kept in LL for at least 7 d. Values shown are means ± SEM (in hours) of two to five independent experiments, each with 8-16 rhythmic flies for each genotype and light intensity. Values for cryb ss flies are repeated from Table 1 for easier comparison. ND, Not determined.

  • a Light intensity experienced by individual flies varied by less than a factor of two around the values shown.