Quantitative genetic variation for thermal performance curves within and among natural populations of Drosophila serrata

Latimer, C. A. L., Wilson, R. S. and Chenoweth, S. F. (2011) Quantitative genetic variation for thermal performance curves within and among natural populations of Drosophila serrata. Journal of Evolutionary Biology, 24 5: 965-975. doi:10.1111/j.1420-9101.2011.02227.x


Author Latimer, C. A. L.
Wilson, R. S.
Chenoweth, S. F.
Title Quantitative genetic variation for thermal performance curves within and among natural populations of Drosophila serrata
Formatted title
Quantitative genetic variation for thermal performance curves within and among natural populations of Drosophila serrata
Journal name Journal of Evolutionary Biology   Check publisher's open access policy
ISSN 1010-061X
1420-9101
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1111/j.1420-9101.2011.02227.x
Volume 24
Issue 5
Start page 965
End page 975
Total pages 11
Place of publication Oxford, U.K.
Publisher Wiley-Blackwell Publishing
Collection year 2012
Language eng
Formatted abstract
Thermal performance curves (TPCs) provide a powerful framework for studying the evolution of continuous reaction norms and for testing hypotheses of thermal adaptation. Although featured heavily in comparative studies, the framework has been comparatively underutilized for quantitative genetic tests of thermal adaptation. We assayed the distribution of genetic (co)variance for TPC (locomotor activity) within and among three natural populations of Drosophila serrata and performed replicated tests of two hypotheses of thermal adaptation – that ‘hotter is better’ and that a generalist-specialist trade-off underpins the evolution of thermal sensitivity. We detected significant genetic variance within, and divergence among, populations. The ‘hotter is better’ hypothesis was not supported as the genetic correlations between optimal temperature (𝑇opt) and maximum performance (𝑧max) were consistently negative. A pattern of variation consistent with a generalist-specialist trade-off was detected within populations and divergence among populations indicated that performance curves were narrower and had higher optimal temperatures in the warmer, but less variable tropical population.
Keyword Function-valued traits
Genetic constraints
Locomotor activity
Template mode of variation
Thermal adaptation
Locomotor performance
Body-size
Evolutionary responses
Swimming performance
Temperature extremes
Stress resistance
Southern border
Reaction norms
Melanogaster
Sensitivity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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Created: Fri, 02 Sep 2011, 16:43:24 EST by Gail Walter on behalf of School of Biological Sciences