Separating multiple sources of variation on heat resistance in Drosophila hydei

Johnstone, Michele, Schiffer, Michele, and Hoffmann, Ary A. (2017) Separating multiple sources of variation on heat resistance in Drosophila hydei. Journal of Insect Physiology, 96. pp. 122-127.

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Abstract

While numerous insect studies have demonstrated the effects environmental conditions, genetic variation and other factors have on thermal resistance, often showing patterns consistent with adaptive plasticity and local adaptation, few experiments have considered the effects of multiple factors simultaneously. Here however, we have investigated the impact of sex, rearing conditions, hardening, population, and laboratory rearing period on adult heat resistance in stocks of Drosophila hydei, a cosmopolitan species that occurs across a range of climatic zones. We show that population and putative laboratory adaptation effects are larger than those associated with rearing temperature and hardening, although there was also a notable interaction between hardening and sex, in that females showed a cost of hardening that was not present in males. In separate experiments, we found that environmental effects across a generation were small and similar in magnitude to those within a generation. These findings suggest multiple sources of variation on heat resistance and place potential genetic versus environmental sources in context. (C) 2016 Elsevier Ltd. All rights reserved.

Item ID: 50700
Item Type: Article (Research - C1)
ISSN: 0022-1910
Keywords: acclimation, adaptation, domestication, maternal, resistance, Drosophila
Funders: Australian Research Council (ARC), Science Industry Endowment Fund
Projects and Grants: ARC Laureate Fellowship
Date Deposited: 20 Sep 2017 11:08
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 20%
06 BIOLOGICAL SCIENCES > 0608 Zoology > 060808 Invertebrate Biology @ 80%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960301 Climate Change Adaptation Measures @ 20%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 80%
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