Université de Fribourg

Systematics of Vriesea (Bromeliaceae): phylogenetic relationships based on nuclear gene and partial plastome sequences

Machado, Talita Mota ; Loiseau, Oriane ; Paris, Margot ; Weigand, Anna ; Versieux, Leonardo M ; Stehmann, João Renato ; Lexer, Christian ; Salamin, Nicolas

In: Botanical Journal of the Linnean Society, 2020, vol. 192, no. 4, p. 656–674

Vriesea is the second largest genus in Tillandsioideae, the most diverse subfamily of Bromeliaceae. Although recent studies focusing on Tillandsioideae have improved the systematics of Vriesea, no consensus has been reached regarding the circumscription of the genus. Here, we present a phylogenetic analysis of core Tillandsioideae using the nuclear gene phyC and plastid data obtained from...

Université de Fribourg

Targeted Capture of Hundreds of Nuclear Genes Unravels Phylogenetic Relationships of the Diverse Neotropical Palm Tribe Geonomateae

Loiseau, Oriane ; Olivares, Ingrid ; Paris, Margot ; Harpe, Marylaure de La ; Weigand, Anna ; Koubínová, Darina ; Rolland, Jonathan ; Bacon, Christine D. ; Balslev, Henrik ; Borchsenius, Finn ; Cano, Angela ; Couvreur, Thomas L. P. ; Delnatte, César ; Fardin, Frédérique ; Gayot, Marc ; Mejía, Fabian ; Mota-Machado, Talita ; Perret, Mathieu ; Roncal, Julissa ; Sanin, Maria José ; Stauffer, Fred ; Lexer, Christian ; Kessler, Michael ; Salamin, Nicolas

In: Frontiers in Plant Science, 2019, vol. 10, p. -

The tribe Geonomateae is a widely distributed group of 103 species of Neotropical palms which contains six ecologically important understory or subcanopy genera. Although it has been the focus of many studies, our understanding of the evolutionary history of this group, and in particular of the taxonomically complex genus Geonoma, is far from complete due to a lack of molecular data....

Université de Fribourg

A dedicated target capture approach reveals variable genetic markers across micro- and macro-evolutionary time scales in palms

de La Harpe, Marylaure ; Hess, Jaqueline ; Loiseau, Oriane ; Salamin, Nicolas ; Lexer, Christian ; Paris, Margot

In: Molecular Ecology Resources, 2019, p. -

Understanding the genetics of biological diversification across micro‐ and macro‐ evolutionary time scales is a vibrant field of research for molecular ecologists as rapid advances in sequencing technologies promise to overcome former limitations. In palms, an emblematic, economically and ecologically important plant family with high diversity in the tropics, studies of diversification at...

Université de Fribourg

Wild tomato endosperm transcriptomes reveal common roles of genomic imprinting in both nuclear and cellular endosperm

Roth, Morgane ; Florez-Rueda, Ana M. ; Paris, Margot ; Städler, Thomas

In: The Plant Journal, 2018, vol. 95, no. 6, p. 1084–1101

Genomic imprinting is a conspicuous feature of the endosperm, a triploid tissue nurturing the embryo and synchronizing angiosperm seed development. An unknown subset of imprinted genes (IGs) is critical for successful seed development and should have highly conserved functions. Recent genome‐wide studies have found limited conservation of IGs among distantly related species, but there is a...

Université de Fribourg

Incidence and developmental timing of endosperm failure in post-zygotic isolation between wild tomato lineages

Roth, Morgane ; Florez-Rueda, Ana M. ; Griesser, Stephan ; Paris, Margot ; Städler, Thomas

In: Annals of Botany, 2018, vol. 121, no. 1, p. 107–118

Background and AimsDefective hybrid seed development in angiosperms might mediate the rapid establishment of intrinsic post-zygotic isolation between closely related species. Extensive crosses within and among three lineages of wild tomatoes (Solanum section Lycopersicon) were performed to address the incidence, developmental timing and histological manifestations of hybrid seed failure....

Université de Fribourg

Molecular ecology studies of species radiations: current research gaps, opportunities and challenges

la Harpe, Marylaure de ; Paris, Margot ; Karger, Dirk N. ; Rolland, Jonathan ; Kessler, Michael ; Salamin, Nicolas ; Lexer, Christian

In: Molecular Ecology, 2017, p. -

Understanding the drivers and limits of species radiations is a crucial goal of evolutionary genetics and molecular ecology, yet research on this topic has been hampered by the notorious difficulty of connecting micro- and macroevolutionary approaches to studying the drivers of diversification. To chart the current research gaps, opportunities and challenges of molecular ecology approaches to...

Université de Fribourg

Adaptive evolution and segregating load contribute to the genomic landscape of divergence in two tree species connected by episodic gene flow

Christe, Camille ; Stölting, Kai N. ; Paris, Margot ; Fraїsse, Christelle ; Bierne, Nicolas ; Lexer, Christian

In: Molecular Ecology, 2017, vol. 26, no. 1, p. 59–76

Speciation often involves repeated episodes of genetic contact between divergent populations before reproductive isolation (RI) is complete. Whole-genome sequencing (WGS) holds great promise for unravelling the genomic bases of speciation. We have studied two ecologically divergent, hybridizing species of the ‘model tree’ genus Populus (poplars, aspens, cottonwoods), Populus alba and P....

Université de Fribourg

Gene flow and diversification in a species complex of Alcantarea inselberg bromeliads

Lexer, Christian ; Marthaler, Fabienne ; Humbert, Sarah ; Barbará, Thelma ; Harpe, Marylaure de la ; Bossolini, Eligio ; Paris, Margot ; Martinelli, Gustavo ; Versieux, Leonardo M.

In: Botanical Journal of the Linnean Society, 2016, vol. 181, no. 3, p. 505–520

Inselberg-adapted species of bromeliads (Bromeliaceae) have been suggested as model systems for understanding the evolutionary genetics of species complexes and radiations in terrestrial, island-like environments. Bromeliads are particularly suitable for addressing the potential roles of interspecific gene exchange during plant speciation and radiation. We have studied populations of five...

Université de Fribourg

Genome-wide patterns of differentiation and spatially varying selection between postglacial recolonization lineages of Populus alba (Salicaceae), a widespread forest tree

Stölting, Kai N. ; Paris, Margot ; Meier, Cécile ; Heinze, Berthold ; Castiglione, Stefano ; Bartha, Denes ; Lexer, Christian

In: New Phytologist, 2015, vol. 207, no. 3, p. 723–734

Studying the divergence continuum in plants is relevant to fundamental and applied biology because of the potential to reveal functionally important genetic variation. In this context, whole-genome sequencing (WGS) provides the necessary rigour for uncovering footprints of selection. We resequenced populations of two divergent phylogeographic lineages of Populus alba (n = 48), thoroughly...