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RAPID LOSS OF STRESS RESISTANCE IN DROSOPHILA MELANOGASTER UNDER ADAPTATION TO LABORATORY CULTURE
Author(s) -
Hoffmann Ary A.,
Hallas Rebecca,
Sinclair Chantelle,
Partridge Linda
Publication year - 2001
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.0014-3820.2001.tb01305.x
Subject(s) - biology , drosophila melanogaster , desiccation , adaptation (eye) , resistance (ecology) , experimental evolution , melanogaster , drosophila (subgenus) , drosophilidae , environmental stress , trait , acquired resistance , genetics , evolutionary biology , ecology , gene , neuroscience , computer science , programming language , cancer
We investigate changes in resistance to desiccation and starvation during adaptation of Drosophila melanogaster to laboratory culture. We test the hypothesis that resistance to environmental stresses is lost under laboratory adaptation. For both traits, there was a rapid loss of resistance over a three‐year period. The rapidity of the response suggested that mutation accumulation could not account for it. Rather, resistance to environmental stresses appeared to be lost as a correlated response to selection on another trait, such as early fertility, with which stress resistance is negatively genetically correlated. These results suggest that caution is needed when extrapolating from evolution of stress resistance in long‐established laboratory stocks to patterns of responses and correlated responses in natural populations.