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Slow evolution of sex-biased genes in the reproductive tissue of the dioecious plant Salix viminalis
UCL, Dept Genet Evolut & Environm, London, England.
UCL, Dept Genet Evolut & Environm, London, England;Univ Sheffield, Dept Anim & Plant Sci, Sheffield, S Yorkshire, England.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences. Swedish Univ Agr Sci, Linnean Ctr Plant Biol, Dept Plant Biol, Uppsala, Sweden. (Array och Analys-Faciliteten)
Swedish Univ Agr Sci, Linnean Ctr Plant Biol, Dept Plant Biol, Uppsala, Sweden.
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2018 (English)In: Molecular Ecology, ISSN 0962-1083, E-ISSN 1365-294X, Vol. 27, no 3, p. 694-708Article in journal (Refereed) Published
Abstract [en]

The relative rate of evolution for sex-biased genes has often been used as a measure of the strength of sex-specific selection. In contrast to studies in a wide variety of animals, far less is known about the molecular evolution of sex-biased genes in plants, particularly in dioecious angiosperms. Here, we investigate the gene expression patterns and evolution of sex-biased genes in the dioecious plant Salix viminalis. We observe lower rates of sequence evolution for male-biased genes expressed in the reproductive tissue compared to unbiased and female-biased genes. These results could be partially explained by the lower codon usage bias for male-biased genes leading to elevated rates of synonymous substitutions compared to unbiased genes. However, the stronger haploid selection in the reproductive tissue of plants, together with pollen competition, would also lead to higher levels of purifying selection acting to remove deleterious variation. Future work should focus on the differential evolution of haploid- and diploid-specific genes to understand the selective dynamics acting on these loci.

Place, publisher, year, edition, pages
WILEY , 2018. Vol. 27, no 3, p. 694-708
Keywords [en]
codon usage bias, dioecious angiosperms, sex-biased gene expression, sexual selection
National Category
Genetics
Identifiers
URN: urn:nbn:se:uu:diva-354531DOI: 10.1111/mec.14466ISI: 000428453500008PubMedID: 29274186OAI: oai:DiVA.org:uu-354531DiVA, id: diva2:1233119
Funder
Swedish Research Council, 2011-3544EU, European Research Council, 260233EU, European Research Council, 680951Helge Ax:son Johnsons stiftelse Available from: 2018-07-16 Created: 2018-07-16 Last updated: 2018-07-16Bibliographically approved

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