Evolution of additive and nonadditive genetic variance in development time along a cline in Drosophila serrata

Sgro, C. M. and Blows, M. W. (2003) Evolution of additive and nonadditive genetic variance in development time along a cline in Drosophila serrata. Evolution, 57 8: 1846-1851. doi:10.1554/03-050


Author Sgro, C. M.
Blows, M. W.
Title Evolution of additive and nonadditive genetic variance in development time along a cline in Drosophila serrata
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1554/03-050
Volume 57
Issue 8
Start page 1846
End page 1851
Total pages 6
Place of publication Lawrence, KS
Publisher Society for the Study of Evolution
Language eng
Subject C1
270207 Quantitative Genetics
780105 Biological sciences
Abstract Latitudinal clines provide natural systems that may allow the effect of natural selection on the genetic variance to be determined. Ten clinal populations of Drosophila serrata collected from the eastern coast of Australia were used to examine clinal patterns in the trait mean and genetic variance of the life-history trait egg-to-adult development time. Development time significantly lengthened from tropical areas to temperate areas. The additive genetic variance for development time in each population was not associated with latitude but was associated with the population mean development time. Additive genetic variance tended to be larger in populations with more extreme development times and appeared to be consistent with allele frequency change. In contrast, the nonadditive genetic variance was not associated with the population mean but was associated with latitude. Levels of nonadditive genetic variance were greatest in the region of the cline where the gradient in the change in mean was greatest, consistent with Barton's (1999) conjecture that the generation of linkage disequilibrium may become an important component of the genetic variance in systems with a spatially varying optimum.
Keyword Ecology
Evolutionary Biology
Genetics & Heredity
Additive Genetic Variance
Clines
Evolution
Life History
Nonadditive Genetic Variance
Body-size
Marginal Populations
Latitudinal Cline
Stress Resistance
Melanogaster
Selection
Divergence
Fitness
Traits
Temperature
Q-Index Code C1
Additional Notes DOI:10.1111/j.0014-3820.2003.tb00592.x

 
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Created: Wed, 15 Aug 2007, 05:06:14 EST