Clinal variation and laboratory adaptation in the rainforest species Drosophila birchii for stress resistance, wing size, wing shape and development time

Clinal variation has been described in many invertebrates including drosophilids but usually over broad geographical gradients. Here we describe clinal variation in the rainforest species Drosophila birchii from Queensland, Australia, and potential confounding effects of laboratory adaptation. Clina...

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Bibliographic Details
Published in:Journal of evolutionary biology 2005-01, Vol.18 (1), p.213-222
Main Authors: Griffiths, J. A., Schiffer, M., Hoffmann, A. A.
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Animals
Biological variation
domestication
Drosophila
Drosophila - anatomy & histology
Drosophila - genetics
Drosophila - growth & development
Drosophila birchii
Evolutionary biology
Female
Geography
Insects
laboratory adaptation
Male
Queensland
Rainforests
size
Starvation
stress resistance
Temperature
Wings, Animal - anatomy & histology
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Summary:Clinal variation has been described in many invertebrates including drosophilids but usually over broad geographical gradients. Here we describe clinal variation in the rainforest species Drosophila birchii from Queensland, Australia, and potential confounding effects of laboratory adaptation. Clinal variation was detected for starvation and development time, but not for size or resistance to temperature extremes. Starvation resistance was higher at southern locations. Wing shape components were not associated with latitude although they did differ among populations. Time in laboratory culture did not influence wing size or heat knockdown resistance, but increased starvation resistance and decreased recovery time following a cold shock. Laboratory culture also increased development time and altered wing shape. The results indicate that clinal patterns can be detected in Drosophila over a relatively narrow geographical area. Laboratory adaptation is unlikely to have confounded the detection of geographical patterns.
ISSN:1010-061X
1420-9101
DOI:10.1111/j.1420-9101.2004.00782.x