Rnbf05400/+, Rnbf05400/Rnbf04616 and Rnbf05400/Df(3R)BSC547 adults previously entrained under 12h:12h light:dark cycles exhibit a significant decrease in the proportion of circadian rhythmic individuals upon shift to constant darkness conditions, despite exhibiting an apparently normal circadian period, as compared to controls; Rnbf05400/Rnbf05400 adults exhibit both a significant decrease in the proportion of circadian rhythmic individuals and a significant increase in circadian period upon shift to constant darkness conditions, as compared to controls; the decrease in the proportion of rhythmic individuals is mild in the heterozygotes and more severe in the homozygotes and transheterozygotes.
In Rnbf05400 homozygous adults kept under 12h:12h light:dark cycle conditions, the dendritic tree of s-LNv neurons exhibit rhythmic area changes of smaller amplitude, as compared to controls.
