- THIS ARTICLE
- Full Text (PDF)
- Alert me when this article is cited
- Alert me if a correction is posted
- SERVICES
- Similar articles in this journal
- Similar articles in PubMed
- Alert me to new issues of the journal
- Download to citation manager
- Reprints & Permissions
- CITING ARTICLES
- Citing Articles via HighWire
- Citing Articles via Google Scholar
- GOOGLE SCHOLAR
- Articles by Lair, K. P.
- Articles by Holzapfel, C. M.
- Search for Related Content
- PUBMED
- PubMed Citation
- Articles by Lair, K. P.
- Articles by Holzapfel, C. M.
Genetics, Vol 147, 1873-1883, Copyright © 1997
INVESTIGATIONS |
Evolutionary Divergence of the Genetic Architecture Underlying Photoperiodism in the Pitcher-Plant Mosquito, Wyeomyia smithii
K. P. Lair, W. E. Bradshaw and C. M. Holzapfel
Present address: Wildlife Biology Program, School of Forestry, The University of Montana, Missoula, MT 59812-1063.
We determine the contribution of composite additive, dominance, and epistatic effects to the genetic divergence of photoperiodic response along latitudinal, altitudinal, and longitudinal gradients in the pitcher-plant mosquito, Wyeomyia smithii. Joint scaling tests of crosses between populations showed wide-spread epistasis as well as additive and dominance differences among populations. There were differences due to epistasis between an alpine population in North Carolina and populations in Florida, lowland North Carolina, and Maine. Longitudinal displacement resulted in differences due to epistasis between Florida and Alabama populations separated by 300 km but not between Maine and Wisconsin populations separated by 2000 km. Genetic differences between New Jersey and Ontario did not involve either dominance or epistasis and we estimated the minimum number of effective factors contributing to a difference in mean critical photoperiod of 5 SD between them as n(E) = 5. We propose that the genetic similarity of populations within a broad northern region is due to their more recent origin since recession of the Laurentide Ice Sheet and that the unique genetic architecture of each population is the result of both mutation and repeated migration-founder-flush episodes during the dispersal of W. smithii in North America. Our results suggest that differences in composite additive and dominance effects arise early in the genetic divergence of populations while differences due to epistasis accumulate after more prolonged isolation.
This article has been cited by other articles:
 |
|
 |
|
  D. Mathias, L. Jacky, W. E. Bradshaw, and C. M. Holzapfel Quantitative Trait Loci Associated with Photoperiodic Response and Stage of Diapause in the Pitcher-Plant Mosquito, Wyeomyia smithii Genetics, May 1, 2007; 176(1): 391 - 402. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. B. Gjuvsland, B. J. Hayes, S. W. Omholt, and O. Carlborg Statistical Epistasis Is a Generic Feature of Gene Regulatory Networks Genetics, January 1, 2007; 175(1): 411 - 420. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. Mathias, L. K. Reed, W. E. Bradshaw, and C. M. Holzapfel Evolutionary Divergence of Circadian and Photoperiodic Phenotypes in the Pitcher-Plant Mosquito, Wyeomyia smithii. J Biol Rhythms, April 1, 2006; 21(2): 132 - 139. [Abstract] [PDF]
|
|
|
|
|
|
W. E. Bradshaw, B. P. Haggerty, and C. M. Holzapfel Epistasis Underlying a Fitness Trait Within a Natural Population of the Pitcher-Plant Mosquito, Wyeomyia smithii Genetics, January 1, 2005; 169(1): 485 - 488. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 W. E. Bradshaw and C. M. Holzapfel Genetic shift in photoperiodic response correlated with global warming PNAS, October 31, 2001; (2001) 241391498. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. E. Bradshaw and C. M. Holzapfel From the Cover: Genetic shift in photoperiodic response correlated with global warming PNAS, December 4, 2001; 98(25): 14509 - 14511. [Abstract] [Full Text] [PDF]
|
|