Monophyly, phylogenetic position and the role of hybridization in Schoenoxiphium Nees (Cariceae, Cyperaceae)

Gehrke, Berit; Martín‐Bravo, Santiago; Muasya, A. Muthama; Luceño, Modesto

doi:10.1016/j.ympev.2010.03.036

Cited by 39 publications

(77 citation statements)

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“…Within the Caricoid clade, two well-supported lineages are found: the Schoenoxiphium clade, including the former genus Schoenoxiphium plus two small clades of Carex species (one containing sections Junciformes and Aciculares and the other grouping C. distachya and allies; Gehrke et al 2010;Global Carex Group 2016), and another comprising the polyphyletic genus Kobresia, the monophyletic genus Uncinia, and several clades with mostly unispicate Carex species (Waterway et al 2009). Morphologically, most species in the Schoenoxiphium clade present compound inflorescences (but unispicate in sections Junciformes and Aciculares, C. macrostyla, C. peregrina, C. pulicaris, and rarely in some individuals of a few species in the former genus Schoenoxiphiun), flattened rachilla mostly present and well developed (ciliate or aculeolate in at least some individuals of all species in the former genus Schoenoxiphium), usually leading to a male spike or a spike of spikelets, perigynia closed (utricles) to wide-mouthed (utricles with male spikes protruding or utriculiform cladoprophylls; Jiménez-Mejías et al 2016), and three stigmas.…”

Section: Introductionmentioning

confidence: 99%

“…Morphologically, most species in the Schoenoxiphium clade present compound inflorescences (but unispicate in sections Junciformes and Aciculares, C. macrostyla, C. peregrina, C. pulicaris, and rarely in some individuals of a few species in the former genus Schoenoxiphiun), flattened rachilla mostly present and well developed (ciliate or aculeolate in at least some individuals of all species in the former genus Schoenoxiphium), usually leading to a male spike or a spike of spikelets, perigynia closed (utricles) to wide-mouthed (utricles with male spikes protruding or utriculiform cladoprophylls; Jiménez-Mejías et al 2016), and three stigmas. Although this group is more or less morphologically well circumscribed (Global Carex Group 2015), its species boundaries are still weakly studied, and the previous published studies (Levyns 1945;Kukkonen 1983;Timonen 1989;Gordon-Gray 1995;Gehrke et al 2010) included only a partial species sampling. The former genus Schoenoxiphium, a monophyletic group nested in the Schoenoxiphium clade, has about 20 species, with its center of diversity in the southeastern parts of Africa, with a few species extending their distribution to southwestern Africa, eastern Africa, Madagascar, and the Arabian Peninsula ( fig.…”

Section: Introductionmentioning

confidence: 99%

“…The former genus Schoenoxiphium, a monophyletic group nested in the Schoenoxiphium clade, has about 20 species, with its center of diversity in the southeastern parts of Africa, with a few species extending their distribution to southwestern Africa, eastern Africa, Madagascar, and the Arabian Peninsula ( fig. 1; Gehrke et al 2010). Moreover, recent phylogenetic analyses have suggested a complex evolutionary history of the group due to hybridization events and/or lineage sorting (Gerhke et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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New Insights into the Systematics of the Schoenoxiphium Clade (Carex, Cyperaceae)

Villaverde

Maguilla

Márquez‐Corro

et al. 2017

International Journal of Plant Sciences

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Editor: Erika EdwardsPremise of research. The Schoenoxiphium clade (Carex, Cyperaceae) exhibits a high species diversity in South Africa and a complex taxonomy. Previous phylogenetic studies did not resolve the species relationships within the Schoenoxiphium clade due to the lack of informative characters in DNA markers used. Our aim is to resolve the species relationships within the Schoenoxiphium clade by adding information from more markers and more samples to information from previous studies.Methodology. We sampled 19 out of 20 recognized species in the former genus Schoenoxiphium. Four DNA regions (two nuclear ribosomal: internal transcribed spacer, external transcribed spacer; two plastid: matK and rps16) were sequenced for 134 samples. Phylogenetic reconstruction was performed using Bayesian inference and maximum likelihood analyses.Pivotal results. The monophyly of the Schoenoxiphium clade was confirmed. Five main clades with strong support were retrieved in congruence with a previous phylogeny. Although species relationships within these clades are still partially unresolved, our phylogeny highlights the need for the description of at least two new species in this group.Conclusions. The monophyly of the former genus Schoenoxiphium, taken together with its morphological synapomorphies and the recent phylogenetic studies and subsequent recircumscription of the genus Carex to include all nested genera, advises the consideration of this clade as a section (Carex sect. Schoenoxiphium Baillon). Additional investigations based on genomic sequencing are needed to fully resolve the species relationships within each of the five main clades.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New Insights into the Systematics of the Schoenoxiphium Clade (Carex, Cyperaceae)

Villaverde

Maguilla

Márquez‐Corro

et al. 2017

International Journal of Plant Sciences

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“…Gehrke et al (2010); Hipp et al (2006); Kükenthal (1909); Reznicek (1990); Starr and Ford (2009);Starr et al (2004Starr et al ( , 2008; Waterway and Starr (2007); Waterway et al (2009).…”

Section: Map 59 Asplundia Vagans Occurrence In Venezuelamentioning

confidence: 99%

“…Although molecular data (Starr et al, 2004(Starr et al, , 2008Waterway et al, 2009;Gehrke et al, 2010) resolve Uncinia as monophyletic, it is embedded in the very large genus Carex and is a major element in a core unispicate clade (Waterway and Starr, 2007;Starr and Ford, 2009) that also includes Cymophyllus and unispiculate species of Kobresia and Carex. Sister to this core unispicate clade is the Schoenoxiphium clade composed of Schoenoxiphium Nees and species of Carex.…”

Section: Uncinia Persmentioning

confidence: 99%

Flora of Guaramacal (Venezuela): Monocotyledons

Dorr¹

2014

Smithsonian Contributions to Botany

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Smithsonian Institution Scholarly PressSmithsonian Institution Scholarly Press s m i t h s o n i a n c o n t r i b u t i o n s t o b o t a n y • n u m b e r 1 0 0 Smithsonian Institution Scholarly Press Smithsonian Institution Scholarly Press Flora of Guaramacal (Venezuela): Monocotyledons L. J. Dorr SERIES PUBLICATIONS OF THE SMITHSONIAN INSTITUTIONEmphasis upon publication as a means of "diffusing knowledge" was expressed by the first Secretary of the Smithsonian. In his formal plan for the Institution, Joseph Henry outlined a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This theme of basic research has been adhered to through the years by thousands of titles issued in series publications under the Smithsonian imprint, commencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: In these series, the Institution publishes small papers and full-scale monographs that report on the research and collections of its various museums and bureaus. The Smithsonian Contributions Series are distributed via mailing lists to libraries, universities, and similar institutions throughout the world.Manuscripts submitted for series publication are received by the Smithsonian Institution Scholarly Press from authors with direct affiliation with the various Smithsonian museums or bureaus and are subject to peer review and review for compliance with manuscript preparation guidelines. General requirements for manuscript preparation are on the inside back cover of printed volumes. For detailed submissions requirements and to review the "Manuscript Preparation and Style Guide for Authors," visit the Submissions page at www.scholarlypress.si.edu. s m i t h s o n i a n c o n t r i b u t i o n s t o b o t a n y • n u m b e r 1 0 0 Includes bibliographical references and index.

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A pre‐Miocene Irano‐Turanian cradle: Origin and diversification of the species‐rich monocot genus Gagea (Liliaceae)

Peterson

Harpke

Peterson

et al. 2019

Ecology and Evolution

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The Irano‐Turanian (IT) floristic region is considered an important center of origin for many taxa. However, there is a lack of studies dealing with typical IT genera that also occur in neighboring areas. The species‐rich monocot genus Gagea Salisb. shows a center of diversity in IT region and a distribution in adjacent regions, therefore representing a good study object to investigate spatial and temporal relationships among IT region and its neighboring areas (East Asia, Euro‐Siberia, Himalaya, and Mediterranean). We aimed at (a) testing the origin of the genus and of its major lineages in the IT region, (b) reconstructing divergence times, and (c) reconstructing colonization events. To address these problems, sequences of the ribosomal DNA internal transcribed spacer (ITS) region of 418 individuals and chloroplast intergenic spacers sequences (psbA‐trnH, trnL‐trnF) of 497 individuals, representing 116 species from all sections of the genus and nearly its entire distribution area were analyzed. Divergence times were estimated under a random molecular clock based on nrITS phylogeny, which was the most complete data set regarding the representation of species and distribution areas. Ancestral distribution ranges were estimated for the nrITS data set as well as for a combined data set, revealing that Gagea most likely originated in southwestern Asia. This genus first diversified there starting in the Early Miocene. In the Middle Miocene, Gagea migrated to the Mediterranean and to East Asia, while migration into Euro‐Siberia took place in the Late Miocene. During the Pleistocene, the Arctic was colonized and Gagea serotina, the most widespread species, reached North America. The Mediterranean basin was colonized multiple times from southwestern Asia or Euro‐Siberia. Most of the currently existing species originated during the last 3 Ma.

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Monophyly, phylogenetic position and the role of hybridization in Schoenoxiphium Nees (Cariceae, Cyperaceae)

Cited by 39 publications

References 57 publications

New Insights into the Systematics of the Schoenoxiphium Clade (Carex, Cyperaceae)

New Insights into the Systematics of the Schoenoxiphium Clade (Carex, Cyperaceae)

Flora of Guaramacal (Venezuela): Monocotyledons

A pre‐Miocene Irano‐Turanian cradle: Origin and diversification of the species‐rich monocot genus Gagea (Liliaceae)

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