Molecular phylogenetic analysis resolves Trisetum (Poaceae: Pooideae: Koeleriinae) polyphyletic: Evidence for a new genus, Sibirotrisetum and resurrection of Acrospelion

Barberá, Patricia; Soreng, Robert J.; Peterson, Paul M.; Romaschenko, Konstantin; Quintanar, Alejandro; Aedo, Carlos

doi:10.1111/jse.12523

Cited by 20 publications

(20 citation statements)

References 29 publications

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“…& Maire) Röser were opposed to a larger clade (91/95/1.00) formed of supported Aveninae s.str. (98/88/1.00) and a lineage (99/97/1.00) sometimes referred to as separate subtribe Koeleriinae (Quintanar & al., ; Saarela & al., ; Barberá & al., ). Cinnagrostis rigida (Kunth) P.M.Peterson & al., traditionally member of Central to South American ‘ Calamagrostis ’ Adans.…”

Section: Resultsmentioning

confidence: 97%

“…The delineation of genera within the Koeleriinae lineage still is an insufficiently solved problem as there are seemingly intermediates between traditionally acknowledged genera and a considerable degree of hybrid speciation and allopolyploid evolution (Quintanar & al., ; Saarela & al., , ; Wölk & Röser, , ; Wölk & al., ; Soreng & al., ; Barberá & al., ). As a possible consequence, all genera of Koeleriinae widely accepted at the present time were unified by Kellogg () under a single genus, Trisetaria Forssk.…”

Section: Discussionmentioning

confidence: 97%

“…Barberá) and Tzveleviochloa . This clade agreed with Koeleriinae clade A (Saarela & al., ; Barberá & al., ) despite different sampling. The changing position of American Graphephorum (Figs.…”

Section: Discussionmentioning

confidence: 99%

“…Since then, due to the sheer size of the group, usually representative genera were selected for comparative studies to gain an overview on the whole Poodae and their major groupings using morphological data, plastid DNA restriction site analysis, traditional Sanger and, more recently, plastid genome sequencing (Soreng & Davis, ; Davis & Soreng, ; Döring & al., ; Quintanar & al., ; Soreng & al., ; Schneider & al., ; Saarela & al., , ; Pimentel & al., ; Orton & al., ). Other studies focused on special groups using an in‐depth sampling of taxa, for example, within traditional Aveneae (Grebenstein & al., ; Döring, ; Saarela & al., , ; Wölk & Röser, , ; Barberá & al., ) and Poeae (Schneider & al., ; Birch & al., , ), in which especially the subtribes Poinae (Hunter & al., ; Gillespie & Soreng, ; Gillespie & al., , , , , ; Refulio‐Rodríguez & al., ; Hoffmann & al., ; Soreng & al., , ; Nosov & al., , ), Loliinae (Torrecilla & Catalán, , Catalán & al., , ; Torrecilla & al., ; Inda & al., ; Cheng & al., ; Minaya & al., ), Sesleriinae (Kuzmanović & al., ), Brizinae and Calothecinae (Essi & al., ; Persson & Rydin, ; Silva & al., ) were studied.…”

Section: Introductionmentioning

confidence: 99%

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Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

Tkach

Schneider

Döring

et al. 2020

TAXON

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To investigate the evolutionary diversification and morphological evolution of grass supertribe Poodae (subfam. Pooideae, Poaceae) we conducted a comprehensive molecular phylogenetic analysis including representatives from most of its accepted genera. We focused on generating a DNA sequence dataset of plastid matK gene-3′trnK exon and trnL-trnF regions and nuclear ribosomal (nr) ITS1-5.8S gene-ITS2 and ETS that was taxonomically overlapping as completely as possible (altogether 257 species). The idea was to infer whether phylogenetic trees or certain clades based on plastid and nrDNA data correspond with each other or discord, revealing signatures of past hybridization. The datasets were analysed separately, in combination, by excluding taxa with discordant placements in the individual gene trees and with duplication of these taxa in a way that each duplicate has only one data partition (plastid or nrDNA). We used maximum likelihood, maximum parsimony and Bayesian approaches. Instances of severe conflicts between the phylogenetic trees derived from both datasets, some of which have been noted earlier, point to hybrid origin of several lineages such as the ABCV clade encompassing several subtribes and subordinate clades,

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Section: Resultsmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

Tkach

Schneider

Döring

et al. 2020

TAXON

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“…Saarela et al, 2010, 2017) may enhance the taxonomic resolution here outlined. At the same time, other evolutionary mechanisms may have played an important role in structuring the molecular diversity of Gastridium , similarly to other Pooideae lineages (Barberá et al, 2019; Peerson & Rydin, 2016; Soreng et al, 2015b). Past or recent hybridization, for instance, could have been facilitated by the frequent co-occurrence of the investigated taxa (see also the large overlap of ecological descriptors reported in Figs.…”

Section: Discussionmentioning

confidence: 98%

Genetic diversity and taxonomic issues inGastridiumP.Beauv (Poaceae) inferred from plastid and nuclear DNA sequence analysis

Scoppola

Cardoni

Pellegrino

et al. 2019

Preprint

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Incomplete taxonomic knowledge may seriously hamper biodiversity conservation efforts that are crucial in a context of global change. Gastridium P.Beauv. is a Mediterranean-Paleotropical member of the Poaceae family, inhabiting ephemeral grass habitats, whose species number and diversity are still imperfectly known. In order to progress towards a comprehensive taxonomic treatment of this genus, we examined patterns of DNA diversity in the four taxa (Gastridium lainzii, G. phleoides, G. scabrum, and G. ventricosum) that have been recently advanced by different authors, based on new morpho-ecological descriptors. We explored nucleotide sequence variation at two plastid (trnH-psbA, trnL-F) and one nuclear (ITS) DNA markers in 44 total individuals. Diversity data were treated with multiple statistical and phylogenetic tools, and integrated with available GenBank sequences of Gastridium and other closely related genera. Despite the limited variability detected, evidence of within-taxon genetic cohesion and estimates of molecular divergence comparable with those of species in the same subtribal lineage (Agrostidinae) were recovered. The identified plastid genealogies appeared congruent with a subdivision of the genus into (at least) three distinct entities, and coherent with collected morphological descriptors.Phylogenetic reconstructions with ITS were less corresponding to taxa identities, likely due to reticulation and polyploidization. Once placed in a broader taxonomic context, the investigated dataset produced plastid and nuclear tree topologies consistent with previous assessments, highlighting the overall little resolution of species and genera within Agrostidinae. In the plastid tree, a sister relationship between Gastridium and Triplachne was weakly supported. In the ITS tree, relationships among these genera were unresolved. The hypothesis of closely related but separately evolving lineages within Gastridium is discussed, suggesting a re-evaluation of its current assessment in taxonomic authorities to enhance our knowledge of the grass family, and assist future biodiversity surveys of key Mediterranean grassland ecosystems.

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Morphological and phylogenetic evidence for subtribe Cinninae and two new subtribes, Hookerochloinae and Dupontiinae (Poaceae tribe PoeaePPAMclade)

Gillespie

Soreng

Bull

et al. 2022

TAXON

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Molecular phylogenetic analyses and morphological characters of the grass supersubtribe Poodinae (tribe Poeae, PPAM clade) were evaluated with the goal of determining the relationships of single-flowered spikelet genera recently classified in subtribe Cinninae and the sister genus of the New Zealand endemic genus Simplicia. A total of 136 samples representing 40 genera and 105 species were analyzed for three plastid (matK, trnC-rpoB, trnT-trnL-trnF) and two nuclear ribosomal DNA markers (ITS, ETS). The Cinninae subtribe, including Aniselytron, Cinna, Cinnastrum, Cyathopus, and Simplicia, was recovered as monophyletic with weak support only in the combined analysis with known/putative hybrid taxa removed. Cinna (excluding Cinnastrum) resolved as paraphyletic due to the position of the morphologically distinctive Cyathopus. Cinninae are characterized by flat leaf blades, open panicles, small, strongly compressed, single-flowered spikelets, with a rachilla extension, and lemmas that are awnless or with a short subterminal awn. The genus Cinnastrum is resurrected for Cinna poiformis and differs from Cinna in its broader glumes and subterete caryopsis with solid endosperm. Simplicia is likely most closely related to the southern and eastern Asian genus Aniselytron, with which it shares unequal and short lower glumes and spikelet disarticulation above the glumes, in contrast to the other three genera of the subtribe. The HSAQN clade, which has mainly multi-flowered spikelets and is sister to Cinninae, is named subtribe Hookerochloinae, including Arctagrostis, Hookerochloa, Nicoraepoa, Saxipoa, and Sylvipoa. The DAD clade, which is known to be of reticulate origin postulated here as involving Cinninae, is named subtribe Dupontiinae, and includes Arctohyalopoa, Arctophila, Dupontia, and Dupontiopsis. These three subtribes, together with subtribes Alopecurinae, Beckmanniinae, and Ventenatinae (along with Brizochloinae not tested here), make up the well-supported Alopecurinae superclade within supersubtribe Poodinae.

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Molecular phylogenetic analysis resolves Trisetum (Poaceae: Pooideae: Koeleriinae) polyphyletic: Evidence for a new genus, Sibirotrisetum and resurrection of Acrospelion

Cited by 20 publications

References 29 publications

Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae

Genetic diversity and taxonomic issues inGastridiumP.Beauv (Poaceae) inferred from plastid and nuclear DNA sequence analysis

Morphological and phylogenetic evidence for subtribe Cinninae and two new subtribes, Hookerochloinae and Dupontiinae (Poaceae tribe PoeaePPAMclade)

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