RRC ID 58305
著者 Léveillé-Bourret É, Chen BH, Garon-Labrecque MÈ, Ford BA, Starr JR.
タイトル RAD sequencing resolves the phylogeny, taxonomy and biogeography of Trichophoreae despite a recent rapid radiation (Cyperaceae).
ジャーナル Mol Phylogenet Evol
Abstract Trichophoreae is a nearly cosmopolitan Cyperaceae tribe that contains ~17 species displaying striking variation in size, inflorescence complexity, and perianth morphology. Although morphologically distinct, the status of its three genera (Cypringlea, Oreobolopsis and Trichophorum) is controversial because recent phylogenetic studies have suggested they might not be reciprocally monophyletic. However, previous analyses have shown conflicting topologies and consistently poor support due to an initial rapid diversification of the tribe. We analysed restriction-site associated DNA sequencing (RADseq) data from nearly all species of the clade, combined with five Sanger-based markers (matK, ndhF, rps16, ETS-1f, ITS) sampled extensively within species. This approach allowed us to resolve deep and shallow relationships within Trichophoreae for the first time, despite an anomaly zone spanning several successive short branches that produced considerable gene tree incongruence. Analyses reveal a primary phylogenetic split of the tribe into two clades roughly corresponding to an East Asian-North American disjunction that dates back to the mid-Miocene, with both clades comprised of a mixture of reduced unispicate and larger taxa with highly compound inflorescences. Morphological characters traditionally used in the circumscription of Trichophoreae genera are shown to be homoplasious. Several of these characters correlate best with climatic conditions, with the most reduced species occurring in open habitats at high latitudes and altitudes. Close relatives with highly compound inflorescences are found in temperate or subtropical forest understories. Cypringlea and Oreobolopsis are deeply nested within Trichophorum, and we merge all three genera into a more broadly circumscribed Trichophorum. We also show that Scirpus filipes is another previously unrecognized East Asian species of Trichophorum with highly compound inflorescences.
巻・号 145
ページ 106727
公開日 2019-12-30
DOI 10.1016/j.ympev.2019.106727
PII S1055-7903(19)30454-3
PMID 31899222
MeSH Bayes Theorem Biodiversity Cyperaceae / anatomy & histology Cyperaceae / classification* Cyperaceae / genetics DNA, Plant / chemistry DNA, Plant / metabolism DNA, Ribosomal / chemistry DNA, Ribosomal / metabolism Likelihood Functions Phylogeny Phylogeography Plastids / genetics Sequence Analysis, DNA
IF 3.496
引用数 1
リソース情報
GBIF The 6-7th National Survey on the Natural Environment: Vegetation Survey Vascular Plant Specimens of Yamagata Prefectural Museum Vascular plant specimens of Akita Prefectural Museum Herbarium, University Archives and Collections, Fukushima University, Japan (FKSE) Herbarium Specimens of Museum of Nature and Human Activities, Hyogo Pref., Japan Ibaraki Nature Museum, Vascular Plants collection Vascular plant specimens of National Museum of Nature and Science (TNS) Plant specimens deposited in Osaka Museum of Natural History, Japan Vascular Plant Specimens of Kochi Prefectural Makino Botanical Garden Vascular Plant Specimen database of Kanagawa Prefectural Museum of Natural History Gunma Museum of Natural History, Vascular Plant Specimen Plant specimens of Kushiro City Museum Vascular plant specimens of Nagano Environmental Conservation Research Institute, Nagano Prefecture Vascular plant specimens of The Shirakami Research Center for Environmental Sciences, Hirosaki University Vascular plant specimens of Aomori City Forestry Museum Plant specimens of the Museum of Yamagata University Vascular plant specimens of Toyama Science Museum The 2-5th National Survey on the Natural Environment: Vegetation Survey