Genomic basis of circannual rhythm in the european corn borer moth

Kozak, Genevieve M.; Wadsworth, Crista B.; Kahne, Shoshanna C.; Bogdanowicz, Steven M.; Harrison, Richard G.; Coates, Brad S.; Dopman, Erik B.

doi:10.1101/633362

Cited by 16 publications

(49 citation statements)

References 113 publications

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“…Among the potential pathways involved in regulating eya transcription, Pigment Dispersing Factor (PDF) signaling represents a strong candidate. PDF is well characterized for its role in photoperiodic sensitivity ( 56 – 62 ), and there is accumulating evidence supporting its involvement in reproductive dormancy by conveying day length signal to the PI ( 63 , 64 ). We speculate that PDF could regulate eya expression in a cyclic adenosine monophosphate (cAMP)-dependent manner, perhaps in response to light signal.…”

Section: Discussionmentioning

confidence: 99%

EYES ABSENT and TIMELESS integrate photoperiodic and temperature cues to regulate seasonal physiology in Drosophila

Abrieux

Xue

Cai

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Organisms possess photoperiodic timing mechanisms to detect variations in day length and temperature as the seasons progress. The nature of the molecular mechanisms interpreting and signaling these environmental changes to elicit downstream neuroendocrine and physiological responses are just starting to emerge. Here, we demonstrate that, inDrosophila melanogaster, EYES ABSENT (EYA) acts as a seasonal sensor by interpreting photoperiodic and temperature changes to trigger appropriate physiological responses. We observed that tissue-specific genetic manipulation ofeyaexpression is sufficient to disrupt the ability of flies to sense seasonal cues, thereby altering the extent of female reproductive dormancy. Specifically, we observed that EYA proteins, which peak at night in short photoperiod and accumulate at higher levels in the cold, promote reproductive dormancy in femaleD. melanogaster. Furthermore, we provide evidence indicating that the role of EYA in photoperiodism and temperature sensing is aided by the stabilizing action of the light-sensitive circadian clock protein TIMELESS (TIM). We postulate that increased stability and level of TIM at night under short photoperiod together with the production of cold-induced and light-insensitive TIM isoforms facilitate EYA accumulation in winter conditions. This is supported by our observations thattimnull mutants exhibit reduced incidence of reproductive dormancy in simulated winter conditions, while flies overexpressingtimshow an increased incidence of reproductive dormancy even in long photoperiod.

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Section: Discussionmentioning

confidence: 99%

EYES ABSENT and TIMELESS integrate photoperiodic and temperature cues to regulate seasonal physiology in Drosophila

Abrieux

Xue

Cai

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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“…Variation in one or a few key regulatory genes can serve as the genetic substrate for phenotypic innovations that promote local adaptation of phenology (15,16). For example, loci functionally associated with the sensing of daylength, or photoperiodism, often provide evidence for seasonal adaptation via monogenic variation, or by just a few major effect loci (17,18). In these examples, central regulatory roles for candidate genes that transduce environmental signals through developmental switches that curtail or activate development provide a plausible path from mono/oligogenic variation to physiological variation to variation in whole-organism phenology.…”

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confidence: 99%

Genome-wide variation and transcriptional changes in diverse developmental processes underlie the rapid evolution of seasonal adaptation

Dowle

Powell

Doellman

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Many organisms enter a dormant state in their life cycle to deal with predictable changes in environments over the course of a year. The timing of dormancy is therefore a key seasonal adaptation, and it evolves rapidly with changing environments. We tested the hypothesis that differences in the timing of seasonal activity are driven by differences in the rate of development during diapause in Rhagoletis pomonella, a fly specialized to feed on fruits of seasonally limited host plants. Transcriptomes from the central nervous system across a time series during diapause show consistent and progressive changes in transcripts participating in diverse developmental processes, despite a lack of gross morphological change. Moreover, population genomic analyses suggested that many genes of small effect enriched in developmental functional categories underlie variation in dormancy timing and overlap with gene sets associated with development rate in Drosophila melanogaster. Our transcriptional data also suggested that a recent evolutionary shift from a seasonally late to a seasonally early host plant drove more rapid development during diapause in the early fly population. Moreover, genetic variants that diverged during the evolutionary shift were also enriched in putative cis regulatory regions of genes differentially expressed during diapause development. Overall, our data suggest polygenic variation in the rate of developmental progression during diapause contributes to the evolution of seasonality in R. pomonella. We further discuss patterns that suggest hourglass-like developmental divergence early and late in diapause development and an important role for hub genes in the evolution of transcriptional divergence.

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“…In fact, species with wide geographic ranges are known to have threshold cues or responses that vary among populations, so that individuals enter the developmental pathway at a locally appropriate time (Danilevskii, ; Levy et al, ; Tauber et al, ). Genes underlying phenology and voltinism shifts during range expansion and response to climate warming have recently been discovered that demonstrate this capacity for local adaptation (Kozak et al, ). In fact, these demographic consequences to a warming climate may result in strong selection pressures to change diapause thresholds (Bean, Dalin, & Dudley, ).…”

Section: Discussionmentioning

confidence: 99%

Developmental trap or demographic bonanza? Opposing consequences of earlier phenology in a changing climate for a multivoltine butterfly

Kerr

Wepprich

Grevstad

et al. 2020

Global Change Biology

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A rapidly changing climate has the potential to interfere with the timing of environmental cues that ectothermic organisms rely on to initiate and regulate life history events. Short‐lived ectotherms that exhibit plasticity in their life history could increase the number of generations per year under warming climate. If many individuals successfully complete an additional generation, the population experiences an additional opportunity to grow, and a warming climate could lead to a demographic bonanza. However, these plastic responses could become maladaptive in temperate regions, where a warmer climate could trigger a developmental pathway that cannot be completed within the growing season, referred to as a developmental trap. Here we incorporated detailed demography into commonly used photothermal models to evaluate these demographic consequences of phenological shifts due to a warming climate on the formerly widespread, multivoltine butterfly (Pieris oleracea). Using species‐specific temperature‐ and photoperiod‐sensitive vital rates, we estimated the number of generations per year and population growth rate over the set of climate conditions experienced during the past 38 years. We predicted that populations in the southern portion of its range have added a fourth generation in recent years, resulting in higher annual population growth rates (demographic bonanzas). We predicted that populations in the Northeast United States have experienced developmental traps, where increases in the thermal window initially caused mortality of the final generation and reduced growth rates. These populations may recover if more growing degree days are added to the year. Our framework for incorporating detailed demography into commonly used photothermal models demonstrates the importance of using both demography and phenology to predict consequences of phenological shifts.

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Genomic basis of circannual rhythm in the european corn borer moth

Abstract: 1 Genetic variation in life-history timing allows populations to synchronize with seasonal cycles but little is 2 known about the molecular mechanisms that produce differences in circannual rhythm in nature. Changes 18 19 20

Cited by 16 publications

References 113 publications

EYES ABSENT and TIMELESS integrate photoperiodic and temperature cues to regulate seasonal physiology in Drosophila

EYES ABSENT and TIMELESS integrate photoperiodic and temperature cues to regulate seasonal physiology in Drosophila

Genome-wide variation and transcriptional changes in diverse developmental processes underlie the rapid evolution of seasonal adaptation

Developmental trap or demographic bonanza? Opposing consequences of earlier phenology in a changing climate for a multivoltine butterfly

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