- 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 Shaw, R. G.
- Articles by Podolsky, R. H.
- Search for Related Content
- PUBMED
- PubMed Citation
- Articles by Shaw, R. G.
- Articles by Podolsky, R. H.
Genetics, Vol 139, 397-406, Copyright © 1995
INVESTIGATIONS |
Quantitative Genetics of Response to Competitors in Nemophila menziesii: A Field Experiment
R. G. Shaw, GAJ. Platenkamp, F. H. Shaw and R. H. Podolsky
Department of Botany and Plant Sciences, University of California, Riverside, California 92521, Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, Minnesota 55108
Recent investigations of evolution in heterogeneous environments have begun to accommodate genetic and environmental complexity typical of natural populations. Theoretical studies demonstrate that evolution of polygenic characters depends heavily on the genetic interdependence of the expression of traits in the different environments in which selection occurs, but information concerning this issue is scarce. We conducted a field experiment to assess the genetic variability of the annual plant Nemophila menziesii in five biotic regimes differing in plant density and composition. Significant, though modest, additive genetic variance in plant size was expressed in particular treatments. Evidence of additive genetic tradeoffs between interspecific and intraspecific competitive performance was found, but this result was not consistent throughout the experiment. Two aspects of experimental design may tend to obscure genetically based tradeoffs across environments in many previously published experiments: (1) inability to isolate additive genetic from other sources of variation and (2) use of novel (e.g., laboratory) environments.
This article has been cited by other articles:
 |
|
 |
|
  J. Leips, P. Gilligan, and T. F. C. Mackay Quantitative Trait Loci With Age-Specific Effects on Fecundity in Drosophila melanogaster Genetics, March 1, 2006; 172(3): 1595 - 1605. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Turelli and N. H. Barton Polygenic Variation Maintained by Balancing Selection: Pleiotropy, Sex-Dependent Allelic Effects and G x E Interactions Genetics, February 1, 2004; 166(2): 1053 - 1079. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. D. Pletcher and C. J. Geyer The Genetic Analysis of Age-Dependent Traits: Modeling the Character Process Genetics, October 1, 1999; 153(2): 825 - 835. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. G. Shaw, D. L. Byers, and F. H. Shaw Genetic Components of Variation in Nemophila menziesii Undergoing Inbreeding: Morphology and Flowering Time Genetics, December 1, 1998; 150(4): 1649 - 1661. [Abstract] [Full Text]
|
|
|
|
|
|
J. D. Fry, S. L. Heinsohn, and T. F. C. Mackay Heterosis for Viability, Fecundity, and Male Fertility in Drosophila melanogaster : Comparison of Mutational and Standing Variation Genetics, March 1, 1998; 148(3): 1171 - 1188. [Abstract] [Full Text] [PDF]
|
|