Artículo
Delimitation of the genus Schizachyrium (Poaceae, Andropogoneae) based on molecular and morphological data
Peichoto, Myriam Carolina
; Moreno, Ercilia Maria Sara
; Welker, Cassiano A. D.; Solis Neffa, Viviana Griselda
; Scataglini, María Amalia
Fecha de publicación:
03/2022
Editorial:
John Wiley and Sons Inc
Revista:
Journal of Systematics and Evolution
ISSN:
1759-6831
e-ISSN:
0529-1526
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Schizachyrium (Poaceae, Andropogoneae) includes about 60 species distributed in tropical and subtropical regions of the world. In all recent molecular phylogenies of Andropogoneae, representatives of Schizachyrium appear closely related to Andropogon species. The objective of this study was to contribute to the delimitation of Schizachyrium. We performed a phylogenetic study including 38 taxa (>63%) of Schizachyrium, along with representatives of related genera, mainly of Andropogon, yielding a total of 49 taxa. This is the first phylogenetic analysis to include the type species of Schizachyrium, S. condensatum. DNA sequences of two plastid markers (ndhF and trnL-F) were analyzed under Bayesian methods. The results indicate that Schizachyrium is not monophyletic: 26 of the 38 Schizachyrium taxa analyzed are placed in a Schizachyrium s.s. clade that includes the type species of the genus, while 10 taxa are related to Andropogon species and two other species, S. delavayi (from China and India) and S. jeffreysii (from Africa), appear clearly separated. Additionally, 58 morphological characters (41 qualitative and 17 quantitative) were scored for the same 49 taxa and analyzed under the parsimony criterion. Character optimizations showed that (i) the reduced pedicellate spikelets, (ii) with lower glume less than or equal to 0.5 mm wide, (iii) awned, and (iv) without lemma and palea support the Schizachyrium s.s. clade. We propose these four characters as diagnostic features for the delimitation of Schizachyrium s.s.
Palabras clave:
DASH CLADE
,
GRASSES
,
MOLECULAR PHYLOGENY
,
MORPHOLOGICAL ANALYSIS
,
PANICOIDEAE
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IBODA)
Articulos de INST.DE BOTANICA DARWINION (I)
Articulos de INST.DE BOTANICA DARWINION (I)
Articulos(IBONE)
Articulos de INST.DE BOTANICA DEL NORDESTE (I)
Articulos de INST.DE BOTANICA DEL NORDESTE (I)
Citación
Peichoto, Myriam Carolina; Moreno, Ercilia Maria Sara; Welker, Cassiano A. D.; Solis Neffa, Viviana Griselda; Scataglini, María Amalia; Delimitation of the genus Schizachyrium (Poaceae, Andropogoneae) based on molecular and morphological data; John Wiley and Sons Inc; Journal of Systematics and Evolution; 60; 2; 3-2022; 319-330
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