Circadian regulation of egg-laying behavior in fruit flies Drosophila melanogaster

Day–night cycles and the sleep-promoting factor, Sleepless, affect stem cell activity in the Drosophila testis

“…However, it is important to note that, although mitotic activity was rhythmic, DNA replication, measured through BrdU incorporation, was not. We suggest that mitosis in these cells is gated by the circadian clock, much like eclosion is in flies (31). Eclosion, which is the hatching of adult flies from their pupal cases, is rhythmic in Drosophila, whereas the preceding developmental events are not; basically, developmentally ready flies are held in pupae until the appropriate time of day when the gate opens.…”

Male reproduction is affected by RNA interference of period and timeless in the desert locust Schistocerca gregaria

“…n ¼ 6 for each sample. Giebultowicz, 2004;Howlader and Sharma, 2006;Sellix and Menaker, 2010;Yoshikawa et al, 2009). In the fruit fly and moths, the circadian clock genes per and tim have been found to be directly connected with male reproductive capacity (Beaver et al, 2002;Kotwica et al, 2009).…”

“…In Drosophila, for example, mating and egg-laying behavior are under the influence of daily rhythms (Beaver and Giebultowicz, 2004;Howlader and Sharma, 2006;Khare et al, 2005;Sakai and Ishida, 2001). RNA interference (RNAi) of the clock genes per and cyc in the bean bug Riptortus pedestris interfere with the photoperiodic regulation of male and female reproductive development and they have opposite effects (Ikeno et al, 2010;Ikeno et al, 2011).…”

Remarks on the article on life-history traits in Drosophila populations selected for rapid development by Yadav and Sharma

“…Secondly it should be noted that many aspects of circadian organization are not affected by constant light (reviewed by Howlader and Sharma, 2006). Moreover, we and others have quite convincingly demonstrated circadian-clock-mediated regulation of life history traits (citations in including pre-adult development time, and therefore any skepticism on this matter is misplaced.…”