Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-04T18:00:06.687Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of stress combinations on the expression of additive genetic variation for fecundity in Drosophila melanogaster

Published online by Cambridge University Press:  01 August 1998

CARLA M. SGRÒ  and
ARY A. HOFFMANN
CARLA M. SGRÒ
Affiliation:
School of Genetics and Human Variation, La Trobe University, Bundoora, Victoria 3083, Australia Present address: Galton Laboratory, Department of Biology, University College London, 4 Stephenson Way, London NW1 2HE, UK.
ARY A. HOFFMANN
Affiliation:
School of Genetics and Human Variation, La Trobe University, Bundoora, Victoria 3083, Australia

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

To test whether stressful conditions altered levels of heritable variation in fecundity in Drosophila melanogaster, parent–offspring comparisons were undertaken across three generations for flies reared in a combined stress (ethanol, cold shock, low nutrition) environment or a control environment. The stressful conditions did not directly influence fecundity but did lead to a reduced fecundity in the offspring generations, perhaps reflecting cross-generation maternal effects. Both the heritability and evolvability estimates were higher in the combined stress treatment, reflecting an apparent increase in the additive genetic variance under stress. In contrast, there were no consistent changes in the environmental variance across environments.

Type
Research Article
Information
Genetics Research , Volume 72 , Issue 1 , August 1998 , pp. 13 - 18
Copyright
© 1998 Cambridge University Press