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Heightened condition-dependence of the sexual transcriptome as a function of genetic quality in Drosophila melanogaster head tissue
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering. Ohio State Univ, OH 43210 USA. (Avian Behav Genom and Physiol Grp)ORCID iD: 0000-0002-0811-1229
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-6112-9586
2019 (English)In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 286, no 1906, article id 20190819Article in journal (Refereed) Published
Abstract [en]

Theory suggests sexual traits should show heightened condition-dependent expression. This prediction has been tested extensively in experiments where condition has been manipulated through environmental quality. Condition-dependence as a function of genetic quality has, however, only rarely been addressed, despite its central importance in evolutionary theory. To address the effect of genetic quality on expression of sexual and non-sexual traits, we here compare gene expression in Drosophila melanogaster head tissue between flies with intact genomes (high condition) and flies carrying a major deleterious mutation (low condition). We find that sex-biased genes show heightened condition-dependent expression in both sexes, and that expression in low condition males and females regresses towards a more similar expression profile. As predicted, sex-biased expression was more sensitive to condition in males compared to females, but surprisingly female-biased, rather than male-biased, genes show higher sensitivity to condition in both sexes. Our results thus support the fundamental predictions of the theory of condition-dependence when condition is a function of genetic quality.

Place, publisher, year, edition, pages
London, United Kingdom: The Royal Society Publishing , 2019. Vol. 286, no 1906, article id 20190819
Keywords [en]
condition-dependence; Drosophila melanogaster; gene expression; genetic quality; sexual dimorphism
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:liu:diva-159261DOI: 10.1098/rspb.2019.0819ISI: 000475797600010PubMedID: 31288700Scopus ID: 2-s2.0-85069302814OAI: oai:DiVA.org:liu-159261DiVA, id: diva2:1341159
Note

Funding Agencies|Lawski Foundation; Swedish Research Council

Available from: 2019-08-07 Created: 2019-08-07 Last updated: 2019-08-15Bibliographically approved

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Malacrinò, Antonino

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