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Artículo

Phylogeny of Nassella (stipeae, pooideae, poaceae) based on analyses of chloroplast and nuclear ribosomal DNA and morphology

Cialdella, Ana MariaIcon ; Sede, Silvana MabelIcon ; Romaschenko, Konstantin; Peterson, Paul M.; Soreng, Robert J.; Zuloaga, Fernando OmarIcon ; Morrone, OsvaldoIcon
Fecha de publicación: 12/2014
Editorial: American Society of Plant Taxonomists
Revista: Systematic Botany
ISSN: 0363-6445
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

The genus Nassella, as currently circumscribed, includes 116-117 American species. It is characterized by florets with a strongly convolute lemma, a conspicuous or inconspicuous crown, and a short palea. Using 53 species of Nassella and 22 outgroup species we conducted phylogenetic analyses to test the monophyly of Nassella and relationships among species. Two plastid (trnT-trnL and rpl32-trnL) and two nuclear ribosomal (ITS and ETS) regions and morphology were used. Our DNA data alone and combined with morphology showed Nassella to be paraphyletic with respect to a monophyletic Amelichloa. Two main clades were recovered: one with species of Nassella distributed in regions of high elevation from Mexico to northwestern Argentina and one composed of the remaining species of Nassella and those of Amelichloa. The latter is mainly concentrated in southern South America in a variety of habitats with generally lower elevation than the other clade. The monophyly of the close relative of Nassella, the South American genus Jarava s. s., was rejected. None of the groups previously circumscribed as subgenera of Stipa, that are now considered to be composed of species in Nassella, were recovered as monophyletic. The close phylogenetic relationship of Nassella and Amelichloa is supported by only one morphological synapomorphy: the lemma margins flat and strongly overlapping. © Copyright 2014 by the American Society of Plant Taxonomists.
Palabras clave: Ets , Its , Morphology , Phylogeny , Plastid Dna , Stipeae
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/37137
DOI: http://dx.doi.org/10.1600/036364414X681419
URL: http://www.ingentaconnect.com/content/aspt/sb/2014/00000039/00000003/art00014
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Articulos(IBODA)
Articulos de INST.DE BOTANICA DARWINION (I)
Citación
Cialdella, Ana Maria; Sede, Silvana Mabel; Romaschenko, Konstantin; Peterson, Paul M.; Soreng, Robert J.; et al.; Phylogeny of Nassella (stipeae, pooideae, poaceae) based on analyses of chloroplast and nuclear ribosomal DNA and morphology; American Society of Plant Taxonomists; Systematic Botany; 39; 3; 12-2014; 814-828
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