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Differential effects of genetic vs. environmental quality in Drosophila melanogaster suggest multiple forms of condition dependence

Condition is a central concept in evolutionary ecology, but the roles of genetic and environmental quality in condition-dependent trait expression remain poorly understood. Theory suggests that condition integrates genetic, epigenetic and somatic factors, and therefore predicts alignment between the phenotypic effects of genetic and environmental quality. To test this key prediction, we manipulated both genetic (mutational) and environmental (dietary) quality in Drosophila melanogaster and examined responses in morphological and chemical (cuticular hydrocarbon, CHC) traits in both sexes. While the phenotypic effects of diet were consistent among genotypes, effects of mutation load varied in magnitude and direction. Average effects of diet and mutation were aligned for most morphological traits, but non-aligned for the male sexcombs and CHCs in both sexes. Our results suggest the existence of distinct forms of condition dependence, one integrating both genetic and environmental effects and the other purely environmental. We propose a model to account for these observations

We thank M. Adler and L. Rowe for discussion, and A. Moore, W. Forstmeier and an anonymous reviewer for thoughtful comments on the manuscript. MAM created the hemiclonal lines and performed mutation accumulation in the laboratory of, and supported by, A. Chippindale. E. Bath, E. Cassidy and M. Telford assisted with morphometrics. Funding was provided by the Australian Research Council (RB), the Natural Sciences and Engineering Research Council of Canada (DA, HDR), the Canadian Foundation for Innovation (HDR) and the Spanish Ministry of Economy and Competitiveness under the project ’METRICS’ (Ref. MTM2012-33236)

© Ecology Letters, 2015, vol. 18, núm. 4, p. 317-326

Wiley

Author: Bonduriansky, Russell
Mallet, Martin A.
Arbuthnott, Devin
Pawlowsky-Glahn, Vera
Egozcue, Juan José
Rundle, Howard D.
Date: 2015 April
Abstract: Condition is a central concept in evolutionary ecology, but the roles of genetic and environmental quality in condition-dependent trait expression remain poorly understood. Theory suggests that condition integrates genetic, epigenetic and somatic factors, and therefore predicts alignment between the phenotypic effects of genetic and environmental quality. To test this key prediction, we manipulated both genetic (mutational) and environmental (dietary) quality in Drosophila melanogaster and examined responses in morphological and chemical (cuticular hydrocarbon, CHC) traits in both sexes. While the phenotypic effects of diet were consistent among genotypes, effects of mutation load varied in magnitude and direction. Average effects of diet and mutation were aligned for most morphological traits, but non-aligned for the male sexcombs and CHCs in both sexes. Our results suggest the existence of distinct forms of condition dependence, one integrating both genetic and environmental effects and the other purely environmental. We propose a model to account for these observations
We thank M. Adler and L. Rowe for discussion, and A. Moore, W. Forstmeier and an anonymous reviewer for thoughtful comments on the manuscript. MAM created the hemiclonal lines and performed mutation accumulation in the laboratory of, and supported by, A. Chippindale. E. Bath, E. Cassidy and M. Telford assisted with morphometrics. Funding was provided by the Australian Research Council (RB), the Natural Sciences and Engineering Research Council of Canada (DA, HDR), the Canadian Foundation for Innovation (HDR) and the Spanish Ministry of Economy and Competitiveness under the project ’METRICS’ (Ref. MTM2012-33236)
Format: application/pdf
ISSN: 1461-023X (versió paper)
1461-0248 (versió electrònica)
Document access: http://hdl.handle.net/10256/10926
Language: eng
Publisher: Wiley
Collection: MINECO/PN 2013-2015/MTM2012-33236
Reproducció digital del document publicat a: http://dx.doi.org/10.1111/ele.12412
Articles publicats (D-IMA)
Is part of: © Ecology Letters, 2015, vol. 18, núm. 4, p. 317-326
Rights: Tots els drets reservats
Subject: Predicció, Teoria de la
Prediction theory
Anàlisi multivariable
Multivariate analysis
Title: Differential effects of genetic vs. environmental quality in Drosophila melanogaster suggest multiple forms of condition dependence
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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