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1 March 2003 BREAKDOWN IN CORRELATIONS DURING LABORATORY EVOLUTION. II. SELECTION ON STRESS RESISTANCE IN DROSOPHILA POPULATIONS
Margaret A. Archer, John P. Phelan, Kelly A. Beckman, Michael R. Rose
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Abstract

We trace the evolutionary correlation between stress resistance and longevity in populations of Drosophila melanogaster selected for stress resistance over many generations. Females selected for desiccation resistance and both females and males selected for increasing starvation resistance initially show concurrent increases in longevity, but then begin to decrease in longevity, even as stress resistance continues to increase. We demonstrate that the correlation between two fitness traits can change and that this change is due to sustained selection rather than a genotype-by-environment interaction or inbreeding depression. The breakdown in evolutionary correlation we report underscores the difficulty of extrapolating the results from short-term selection experiments to predictions of long-term evolution.

Margaret A. Archer, John P. Phelan, Kelly A. Beckman, and Michael R. Rose "BREAKDOWN IN CORRELATIONS DURING LABORATORY EVOLUTION. II. SELECTION ON STRESS RESISTANCE IN DROSOPHILA POPULATIONS," Evolution 57(3), 536-543, (1 March 2003). https://doi.org/10.1554/0014-3820(2003)057[0536:BICDLE]2.0.CO;2
Received: 28 January 2002; Accepted: 18 November 2002; Published: 1 March 2003
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KEYWORDS
antagonistic pleiotropy
evolutionary trajectories
Genetic correlations
Laboratory evolution
longevity
long-term selection
stress resistance
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