Environmental stress, inbreeding, and the nature of phenotypic and genetic variance in Drosophila melanogaster

Proceedings. Biological Sciences
Kevin Fowler, Michael C Whitlock

Abstract

Fifty-two lines of Drosophila melanogaster founded by single-pair population bottlenecks were used to study the effects of inbreeding and environmental stress on phenotypic variance, genetic variance and survivorship. Cold temperature and high density cause reduced survivorship, but these stresses do not cause repeatable changes in the phenotypic variance of most wing morphological traits. Wing area, however, does show increased phenotypic variance under both types of environmental stress. This increase is no greater in inbred than in outbred lines, showing that inbreeding does not increase the developmental effects of stress. Conversely, environmental stress does not increase the extent of inbreeding depression. Genetic variance is not correlated with environmental stress, although the amount of genetic variation varies significantly among environments and lines vary significantly in their response to environmental change. Drastic changes in the environment can cause changes in phenotypic and genetic variance, but not in a way reliably predicted by the notion of 'stress'.

References

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Aug 1, 1999·Evolution; International Journal of Organic Evolution·Kevin Fowler, Michael C Whitlock
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Citations

Aug 4, 2005·Heredity·P Armbruster, D H Reed
Nov 19, 2010·Journal of the Royal Society, Interface·Harold P de Vladar, Nick H Barton
Jan 27, 2016·Ecology and Evolution·Crispin Y JordanKathryn A Hodgins
Aug 5, 2003·Evolution; International Journal of Organic Evolution·Stacey B DayLisa M Meffert
Dec 3, 2003·Journal of Evolutionary Biology·P Y HenryP Jarne
Jun 24, 2004·Evolution; International Journal of Organic Evolution·Samuel CottonAndrew Pomiankowski
Dec 23, 2003·Evolution; International Journal of Organic Evolution·Howard D Rundle
Sep 25, 2003·Evolution; International Journal of Organic Evolution·David H ReedRichard Frankham
Sep 24, 2018·Journal of Dairy Science·R S StephansenE Norberg
May 9, 2018·Australasian Psychiatry : Bulletin of Royal Australian and New Zealand College of Psychiatrists·Ravindra AgrawalCarlos Zubaran
Nov 20, 2008·Conservation Biology : the Journal of the Society for Conservation Biology·Noella J Gray, Lisa M Campbell
Aug 25, 2010·Evolution; International Journal of Organic Evolution·Charles W Fox, David H Reed
May 8, 2021·Biological Reviews of the Cambridge Philosophical Society·Agata Plesnar-Bielak, Aleksandra Łukasiewicz

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