Resistance to temperature extremes between and within life cycle stages in Drosophila serrata, D-birchii and their hybrids: intraspecific and interspecific comparisons

Berrigan, D., Hercus, M. J., Blows, M. W., Magiafoglou, A. and Hoffmann, A. A. (2000) Resistance to temperature extremes between and within life cycle stages in Drosophila serrata, D-birchii and their hybrids: intraspecific and interspecific comparisons. Biological Journal of The Linnean Society, 71 3: 403-416. doi:10.1111/j.1095-8312.2000.tb01266.x


Author Berrigan, D.
Hercus, M. J.
Blows, M. W.
Magiafoglou, A.
Hoffmann, A. A.
Title Resistance to temperature extremes between and within life cycle stages in Drosophila serrata, D-birchii and their hybrids: intraspecific and interspecific comparisons
Journal name Biological Journal of The Linnean Society   Check publisher's open access policy
ISSN 0024-4066
Publication date 2000-01-01
Sub-type Article (original research)
DOI 10.1111/j.1095-8312.2000.tb01266.x
Volume 71
Issue 3
Start page 403
End page 416
Total pages 14
Place of publication London
Publisher The Linnean Society
Language eng
Subject 270500 Zoology
780105 Biological sciences
Abstract Intraspecific Drosophila studies suggest that resistance to heal and cold stresses are largely independent and that correlations across life cycle stages are low whereas comparisons of Drosophila species indicate correlations between heat and cold resistance as well as between resistance levels in different life cycle stages. These inconsistent results may reflect differences in associations among traits at the interspecific and intraspecific levels or interspecific correlations arising because of correlated selection pressures. These alternatives were tested using Drosophila serrata, D. birchii and hybrids derived from these species. Variation among hybrid lines and families was used to test associations at the interspecific level while intraspecific variation was examined using isofemale lines of D. serrata. There was a significant association between adult heat knockdown time at 38 degreesC and adult cold resistance in one set of hybrid lines. An association between female knockdown resistance to heat and larval heat resistance was also evident in one set of hybrids. Resistance to heat anti cold at the larval stage were not correlated at either the intraspecific or interspecific levels. At the intraspecific level, lan al heat resistance and two measures of adult heat resistance were uncorrelated. Moreover, adult and larval cold resistance measures were not correlated at either the intraspecific or interspecific levels. These results suggest that there are no associations between resistance to heat and cold extremes and that extreme temperature resistance is largely independent across life cycle stages at both the intraspecific and interspecific levels. Species associations may therefore arise from correlated selection pressures rather than trait correlations. (C) 2000 The Linnean Society of London.
Keyword Evolutionary Biology
Drosophila Birchii
Drosophila Serrata
Thermal Stress
Hybrids
Life Stages
Desiccation Resistance
Melanogaster
Selection
Stress
Larval
Heat
Acclimation
Responses
Subgroup
Climate
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Mon, 13 Aug 2007, 22:03:01 EST