Geographic and developmental variation in expression of the circadian rhythm gene, timeless, in the pitcher-plant mosquito, Wyeomyia smithii

D. Mathias; L. Jacky; W. E. Bradshaw; C. M. Holzapfel

doi:10.1016/j.jinsphys.2005.03.011

Geographic and developmental variation in expression of the circadian rhythm gene, timeless, in the pitcher-plant mosquito, Wyeomyia smithii

D. Mathias, L. Jacky, W. E. Bradshaw, C. M. Holzapfel

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Expression of the circadian rhythm gene timeless was investigated in the pitcher-plant mosquito, Wyeomyia smithii (Coq.), and was found to vary with time of day, instar of diapause, and latitude of origin. The temporal pattern of timeless expression differed between the two diapausing instars and was significantly higher in southern (38-40°N) than in northern (50°N) populations, when diapausing instar was held constant. Expression of timeless is therefore both developmentally and evolutionarily variable. This result provides the first example of a latitudinal difference in the expression of timeless, suggesting that, along with evidence from other insects, timeless has the potential to affect photoperiodic response and its adaptive evolution in temperate seasonal environments.

Original language	English (US)
Pages (from-to)	661-667
Number of pages	7
Journal	Journal of Insect Physiology
Volume	51
Issue number	6 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jinsphys.2005.03.011
State	Published - Jun 2005
Externally published	Yes

Keywords

Circadian rhythm
Latitude
Photoperiodism
Stage of diapause
timeless

ASJC Scopus subject areas

Physiology
Insect Science

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10.1016/j.jinsphys.2005.03.011

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title = "Geographic and developmental variation in expression of the circadian rhythm gene, timeless, in the pitcher-plant mosquito, Wyeomyia smithii",

abstract = "Expression of the circadian rhythm gene timeless was investigated in the pitcher-plant mosquito, Wyeomyia smithii (Coq.), and was found to vary with time of day, instar of diapause, and latitude of origin. The temporal pattern of timeless expression differed between the two diapausing instars and was significantly higher in southern (38-40°N) than in northern (50°N) populations, when diapausing instar was held constant. Expression of timeless is therefore both developmentally and evolutionarily variable. This result provides the first example of a latitudinal difference in the expression of timeless, suggesting that, along with evidence from other insects, timeless has the potential to affect photoperiodic response and its adaptive evolution in temperate seasonal environments.",

keywords = "Circadian rhythm, Latitude, Photoperiodism, Stage of diapause, timeless",

author = "D. Mathias and L. Jacky and Bradshaw, {W. E.} and Holzapfel, {C. M.}",

note = "Funding Information: We thank D. Hazelett and Y.-L. Yan for advice and consultation concerning real-time, quantitative PCR and K. Emerson, C. Kyriacou, P. Phillips, J. Postlethwait, and D. Siedler for useful discussion. We also gratefully acknowledge support from the University of Oregon Office of Research and Graduate Studies, the National Institutes of Health training Grant support for D.M. (2T32GM07413-26), and National Science Foundation IGERT (DGE-9972830) and Doctoral Dissertation Improvement Grant for D.M. (IBN-0408154), and research Grants DEB-9806278, IBN-9814438, and IBN-0415653 to W.E.B.",

year = "2005",

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language = "English (US)",

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AU - Bradshaw, W. E.

AU - Holzapfel, C. M.

N1 - Funding Information: We thank D. Hazelett and Y.-L. Yan for advice and consultation concerning real-time, quantitative PCR and K. Emerson, C. Kyriacou, P. Phillips, J. Postlethwait, and D. Siedler for useful discussion. We also gratefully acknowledge support from the University of Oregon Office of Research and Graduate Studies, the National Institutes of Health training Grant support for D.M. (2T32GM07413-26), and National Science Foundation IGERT (DGE-9972830) and Doctoral Dissertation Improvement Grant for D.M. (IBN-0408154), and research Grants DEB-9806278, IBN-9814438, and IBN-0415653 to W.E.B.

PY - 2005/6

Y1 - 2005/6

N2 - Expression of the circadian rhythm gene timeless was investigated in the pitcher-plant mosquito, Wyeomyia smithii (Coq.), and was found to vary with time of day, instar of diapause, and latitude of origin. The temporal pattern of timeless expression differed between the two diapausing instars and was significantly higher in southern (38-40°N) than in northern (50°N) populations, when diapausing instar was held constant. Expression of timeless is therefore both developmentally and evolutionarily variable. This result provides the first example of a latitudinal difference in the expression of timeless, suggesting that, along with evidence from other insects, timeless has the potential to affect photoperiodic response and its adaptive evolution in temperate seasonal environments.

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Geographic and developmental variation in expression of the circadian rhythm gene, timeless, in the pitcher-plant mosquito, Wyeomyia smithii

Abstract

Keywords

ASJC Scopus subject areas

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