Artículo
New circumscription of the genus Gamochaeta (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
Urtubey, Estrella
; López, Alicia
; Chemisquy, Maria Amelia
; Anderberg, Arne A.; Baeza, Carlos M.; Bayón, Néstor D.; Deble, Leonardo P.; Moreira Muñoz, Andrés; Nesom, Guy L.; Alford, Mac H.; Salomón, Luciana
; Freire, Susana Edith
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
07/2016
Editorial:
Springer Wien
Revista:
Plant Systematics and Evolution
ISSN:
0378-2697
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Gamochaeta(tribe Gnaphalieae, Asteraceae) iscomposed of ca. 60 species primarily distributed in tropicaland subtropical America. Within the tribe Gnaphalieae, thegenus is characterized by capitula arranged in spikes orhead-like clusters, few hermaphroditic central florets,truncate style branches with apical sweeping trichomes,pappus bristles connate at the base into a ring falling as aunit, and achenes with globose twin trichomes. Previousmolecular phylogenetic studies have suggested the para-phyly of the genus, but have not provided a basis forredefining generic limits due to incomplete taxon sampling.To address this problem, DNA sequences from the plastid(trnL-F) and nuclear (ETS and ITS) genomes were ana-lyzed from a broad taxon sample representing the full rangeof morphological variation known in the genus. Our resultsaffirm thatGamochaetais paraphyletic as presently cir-cumscribed. Two clades can be recognized: one clade thatincludes the majority of the species currently assigned toGamochaetaand a second clade that includesGamochaetopsis,Stuckertiellaand seven species ofGamochaeta.We present here a new circumscription ofGamochaeta, including two new combinations,Gamo-chaeta alpinaandGamochaeta peregrina,and the resur-rection ofGamochaeta capitata. Our results also showOmalotheca supina,O. norvegicaandO. sylvatica, whichwere placed by some authors inGamochaetaor inGnaphalium, form a monophyletic group distantly relatedto both genera.
Palabras clave:
Gamochaetopsis
,
Omalotheca
,
Stuckertiella
,
Ets
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IBODA)
Articulos de INST.DE BOTANICA DARWINION (I)
Articulos de INST.DE BOTANICA DARWINION (I)
Citación
Urtubey, Estrella; López, Alicia; Chemisquy, Maria Amelia; Anderberg, Arne A.; Baeza, Carlos M.; et al.; New circumscription of the genus Gamochaeta (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences; Springer Wien; Plant Systematics and Evolution; 302; 8; 7-2016; 1047-1066
Compartir
Altmétricas