Variation in thermal performance and reaction norms among populations of Drosophila melanogaster.

Details

Serval ID
serval:BIB_BD76566561D1
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Variation in thermal performance and reaction norms among populations of Drosophila melanogaster.
Journal
Evolution
Author(s)
Klepsatel P., Gáliková M., De Maio N., Huber C.D., Schlötterer C., Flatt T.
ISSN
1558-5646 (Electronic)
ISSN-L
0014-3820
Publication state
Published
Issued date
2013
Peer-reviewed
Oui
Volume
67
Number
12
Pages
3573-3587
Language
english
Abstract
The major goal of evolutionary thermal biology is to understand how variation in temperature shapes phenotypic evolution. Comparing thermal reaction norms among populations from different thermal environments allows us to gain insights into the evolutionary mechanisms underlying thermal adaptation. Here, we have examined thermal adaptation in six wild populations of the fruit fly (Drosophila melanogaster) from markedly different natural environments by analyzing thermal reaction norms for fecundity, thorax length, wing area, and ovariole number under ecologically realistic fluctuating temperature regimes in the laboratory. Contrary to expectation, we found only minor differences in the thermal optima for fecundity among populations. Differentiation among populations was mainly due to differences in absolute (and partly also relative) thermal fecundity performance. Despite significant variation among populations in the absolute values of morphological traits, we observed only minor differentiation in their reaction norms. Overall, the thermal reaction norms for all traits examined were remarkably similar among different populations. Our results therefore suggest that thermal adaptation in D. melanogaster predominantly involves evolutionary changes in absolute trait values rather than in aspects of thermal reaction norms.
Keywords
Fecundity, life history, phenotypic plasticity, temperature, thermal adaptation
Pubmed
Web of science
Create date
29/08/2013 16:30
Last modification date
20/08/2019 15:31
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