Dioecy and chromosomal sex determination are maintained through allopolyploid speciation in the plant genus Mercurialis

Toups MA, Vicoso B, Pannell JR. 2022. Dioecy and chromosomal sex determination are maintained through allopolyploid speciation in the plant genus Mercurialis. PLoS Genetics. 18(7), e1010226.

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Abstract
Polyploidization may precipitate dramatic changes to the genome, including chromosome rearrangements, gene loss, and changes in gene expression. In dioecious plants, the sex-determining mechanism may also be disrupted by polyploidization, with the potential evolution of hermaphroditism. However, while dioecy appears to have persisted through a ploidy transition in some species, it is unknown whether the newly formed polyploid maintained its sex-determining system uninterrupted, or whether dioecy re-evolved after a period of hermaphroditism. Here, we develop a bioinformatic pipeline using RNA-sequencing data from natural populations to demonstrate that the allopolyploid plant Mercurialis canariensis directly inherited its sex-determining region from one of its diploid progenitor species, M. annua, and likely remained dioecious through the transition. The sex-determining region of M. canariensis is smaller than that of its diploid progenitor, suggesting that the non-recombining region of M. annua expanded subsequent to the polyploid origin of M. canariensis. Homeologous pairs show partial sexual subfunctionalization. We discuss the possibility that gene duplicates created by polyploidization might contribute to resolving sexual antagonism.
Publishing Year
Date Published
2022-07-06
Journal Title
PLoS Genetics
Acknowledgement
JRP was supported by the Swiss National Science Foundation (https://www.snf.ch/en), Sinergia grant 26073998. BV was supported by the European Research Council (https://erc.europa.eu/) under the European Union’s Horizon 2020 research and innovation program, grant number 715257. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Plants were grown in Lausanne by Aline Revel, and RNA extraction and library preparation were performed by Dessislava Savova Bianchi. All sequencing and the IsoSeq3 analysis were carried out by Center for Integrative Genomics at the University of Lausanne. All other computational analyses were performed on the server at IST Austria.
Volume
18
Issue
7
Article Number
e1010226
eISSN
IST-REx-ID

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Toups MA, Vicoso B, Pannell JR. Dioecy and chromosomal sex determination are maintained through allopolyploid speciation in the plant genus Mercurialis. PLoS Genetics. 2022;18(7). doi:10.1371/journal.pgen.1010226
Toups, M. A., Vicoso, B., & Pannell, J. R. (2022). Dioecy and chromosomal sex determination are maintained through allopolyploid speciation in the plant genus Mercurialis. PLoS Genetics. Public Library of Science. https://doi.org/10.1371/journal.pgen.1010226
Toups, Melissa A, Beatriz Vicoso, and John R. Pannell. “Dioecy and Chromosomal Sex Determination Are Maintained through Allopolyploid Speciation in the Plant Genus Mercurialis.” PLoS Genetics. Public Library of Science, 2022. https://doi.org/10.1371/journal.pgen.1010226.
M. A. Toups, B. Vicoso, and J. R. Pannell, “Dioecy and chromosomal sex determination are maintained through allopolyploid speciation in the plant genus Mercurialis,” PLoS Genetics, vol. 18, no. 7. Public Library of Science, 2022.
Toups MA, Vicoso B, Pannell JR. 2022. Dioecy and chromosomal sex determination are maintained through allopolyploid speciation in the plant genus Mercurialis. PLoS Genetics. 18(7), e1010226.
Toups, Melissa A., et al. “Dioecy and Chromosomal Sex Determination Are Maintained through Allopolyploid Speciation in the Plant Genus Mercurialis.” PLoS Genetics, vol. 18, no. 7, e1010226, Public Library of Science, 2022, doi:10.1371/journal.pgen.1010226.
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2022-08-01
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