Toward finally unraveling the phylogenetic relationships of Juncaceae with respect to another cyperid family, Cyperaceae

0563200 - ÚEB 2023 RIV US eng J - Journal Article
Brožová, V. - Proćków, J. - Záveská Drábková, Lenka
Toward finally unraveling the phylogenetic relationships of Juncaceae with respect to another cyperid family, Cyperaceae.
Molecular Phylogenetics and Evolution. Roč. 177, Dec 1 (2022), č. článku 107588. ISSN 1055-7903. E-ISSN 1095-9513
R&D Projects: GA ČR GP206/07/P147; GA ČR(CZ) GAP506/11/0774; GA ČR(CZ) GA19-02699S
Institutional support: RVO:61389030
Keywords : cpDNA * Cyperaceae * Cyperids * Identification keys * Juncaceae * nDNA * New genera * Phylogeny * Taxonomy
OECD category: Plant sciences, botany
Impact factor: 4.1, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.ympev.2022.107588

Juncaceae is a cosmopolitan family belonging to the cyperid clade of Poales together with Cyperaceae and Thurniaceae. These families have global economic and ethnobotanical significance and are often keystone species in wetlands around the world, with a widespread cosmopolitan distribution in temperate and arctic regions in both hemispheres. Currently, Juncaceae comprises more than 474 species in eight genera: Distichia, Juncus, Luzula, Marsippospermum, Oreojuncus, Oxychloë, Patosia and Rostkovia. The phylogeny of cyperids has not been studied before in a complex view based on most sequenced species from all three families. In this study, most sequenced regions from chloroplast (rbcL, trnL, trnL-trnF) and nuclear (ITS1-5.8S-ITS2) genomes were employed from more than a thousand species of cyperids covering all infrageneric groups from their entire distributional range. We analyzed them by maximum parsimony, maximum likelihood, and Bayesian inference to revise the phylogenetic relationships in Juncaceae and Cyperaceae. Our major results include the delimitation of the most problematic paraphyletic genus Juncus, in which six new genera are recognized and proposed to recover monophyly in this group: Juncus, Verojuncus, gen. nov., Juncinella, gen. et stat. nov., Alpinojuncus, gen. nov., Australojuncus, gen. nov., Boreojuncus, gen. nov. and Agathryon, gen. et stat. nov. For these genera, a new category, Juncus supragen. et stat. nov., was established. This new classification places most groups recognized within the formal Juncus clade into natural genera that are supported by morphological characters.
Permanent Link: https://hdl.handle.net/11104/0335241