Adaptive differences in circadian clock gene expression patterns and photoperiodic diapause induction in Nasonia vitripennis

Elena Dalla Benetta*, Leo W. Beukeboom, Louis van de Zande

*Bijbehorende auteur voor dit werk

Onderzoeksoutput: ArticleAcademicpeer review

19 Citaten (Scopus)
150 Downloads (Pure)


Day length (photoperiod) and temperature oscillate daily and seasonally and are important cues for season-dependent behavior. Larval diapause of the parasitoid Nasonia vitripennis is maternally induced following a certain number of days (switch point) of a given critical photoperiod (CPP). Both the switch point and the CPP follow a latitudinal cline in European N. vitripennis populations. We previously showed that allelic frequencies of the clock gene period correlate with this diapause induction cline. Here we report that circadian expression of four clock genes-period (per), cryptochrome-2 (cry-2), clock (clk), and cycle (cyc)-oscillates as a function of photoperiod and latitude of origin in wasps from populations from the extremes of the cline. Expression amplitudes are lower in northern wasps, indicating a weaker, more plastic clock. Northern wasps also have a later onset of activity and longer free-running rhythms under constant conditions. RNA interference of per caused speeding up of the circadian clock, changed the expression of other clock genes, and delayed diapause in both southern and northern wasps. These results point toward adaptive latitudinal clock gene expression differences and to a key role of per in the timing of photoperiodic diapause induction of N. vitripennis.

Originele taal-2English
Pagina's (van-tot)881-896
Aantal pagina's16
TijdschriftAmerican Naturalist
Nummer van het tijdschrift6
StatusPublished - 1-jun.-2019

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