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Complex mitonuclear interactions and metabolic costs of mating in male seed beetles
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
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2016 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 29, no 2, 360-370 p.Article in journal (Refereed) Published
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Abstract [en]

The lack of evolutionary response to selection on mitochondrial genes through males predicts the evolution of nuclear genetic influence on male-specific mitochondrial function, for example by gene duplication and evolution of sex-specific expression of paralogs involved in metabolic pathways. Intergenomic epistasis may therefore be a prevalent feature of the genetic architecture of male-specific organismal function. Here, we assess the role of mitonuclear genetic variation for male metabolic phenotypes [metabolic rate and respiratory quotient (RQ)] associated with ejaculate renewal, in the seed beetle Callosobruchus maculatus, by assaying lines with crossed combinations of distinct mitochondrial haplotypes and nuclear lineages. We found a significant increase in metabolic rate following mating relative to virgin males. Moreover, processes associated with ejaculate renewal showed variation in metabolic rate that was affected by mitonuclear interactions. Mitochondrial haplotype influenced mating-related changes in RQ, but this pattern varied over time. Mitonuclear genotype and the energy spent during ejaculate production affected the weight of the ejaculate, but the strength of this effect varied across mitochondrial haplotypes showing that the genetic architecture of male-specific reproductive function is complex. Our findings unveil hitherto underappreciated metabolic costs of mating and ejaculate renewal, and provide the first empirical demonstration of mitonuclear epistasis on male reproductive metabolic processes.

Place, publisher, year, edition, pages
2016. Vol. 29, no 2, 360-370 p.
Keyword [en]
Callosobruchus maculatus, epistasis, metabolism, mitochondrial DNA, seed beetles, sex-specific selection
National Category
Zoology
Identifiers
URN: urn:nbn:se:uu:diva-280890DOI: 10.1111/jeb.12789ISI: 000370070500012PubMedID: 26548644OAI: oai:DiVA.org:uu-280890DiVA: diva2:912348
Funder
EU, European Research Council, GENCON AdG-294333Swedish Research Council, 621-2010-5266
Available from: 2016-03-16 Created: 2016-03-16 Last updated: 2017-08-02Bibliographically approved

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Immonen, ElinaRönn, JohannaBerger, DavidArnqvist, Göran

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