New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences

Autores
Urtubey, Estrella; López, Alicia Beatriz; Chemisquy, Maria Amelia; Anderberg, Arne A.; Baeza, Carlos M.; Bayón, Néstor David; Deble, Leonardo Paz; Moreira-Muñoz, Andrés; Nesom, Guy L.; Alford, Mac H.; Salomón, Luciana; Freire, Susana Edith
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Gamochaeta (tribe Gnaphalieae, Asteraceae) is composed of ca. 60 species primarily distributed in tropical and subtropical America. Within the tribe Gnaphalieae, the genus is characterized by capitula arranged in spikes or head-like clusters, few hermaphroditic central florets, truncate style branches with apical sweeping trichomes, pappus bristles connate at the base into a ring falling as a unit, and achenes with globose twin trichomes. Previous molecular phylogenetic studies have suggested the paraphyly of the genus, but have not provided a basis for redefining 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 analyzed from a broad taxon sample representing the full range of morphological variation known in the genus. Our results affirm that Gamochaeta is paraphyletic as presently circumscribed. Two clades can be recognized: one clade that includes the majority of the species currently assigned to Gamochaeta and a second clade that includes Gamochaetopsis, Stuckertiella and seven species of Gamochaeta. We present here a new circumscription of Gamochaeta, including two new combinations, Gamochaeta alpina and Gamochaeta peregrina, and the resurrection of Gamochaeta capitata. Our results also show Omalotheca supina, O. norvegica and O. sylvatica, which were placed by some authors in Gamochaeta or in Gnaphalium, form a monophyletic group distantly related to both genera.
Facultad de Ciencias Agrarias y Forestales
Materia
Ciencias Agrarias
Gamochaetopsis
Omalotheca
Stuckertiella
ETS
ITS
trnL-F
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/133379
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/133379
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequencesUrtubey, EstrellaLópez, Alicia BeatrizChemisquy, Maria AmeliaAnderberg, Arne A.Baeza, Carlos M.Bayón, Néstor DavidDeble, Leonardo PazMoreira-Muñoz, AndrésNesom, Guy L.Alford, Mac H.Salomón, LucianaFreire, Susana EdithCiencias AgrariasGamochaetopsisOmalothecaStuckertiellaETSITStrnL-F<i>Gamochaeta</i> (tribe Gnaphalieae, Asteraceae) is composed of ca. 60 species primarily distributed in tropical and subtropical America. Within the tribe Gnaphalieae, the genus is characterized by capitula arranged in spikes or head-like clusters, few hermaphroditic central florets, truncate style branches with apical sweeping trichomes, pappus bristles connate at the base into a ring falling as a unit, and achenes with globose twin trichomes. Previous molecular phylogenetic studies have suggested the paraphyly of the genus, but have not provided a basis for redefining 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 analyzed from a broad taxon sample representing the full range of morphological variation known in the genus. Our results affirm that <i>Gamochaeta</i> is paraphyletic as presently circumscribed. Two clades can be recognized: one clade that includes the majority of the species currently assigned to <i>Gamochaeta</i> and a second clade that includes <i>Gamochaetopsis</i>, <i>Stuckertiella</i> and seven species of <i>Gamochaeta</i>. We present here a new circumscription of <i>Gamochaeta</i>, including two new combinations, <i>Gamochaeta alpina</i> and <i>Gamochaeta peregrina</i>, and the resurrection of <i>Gamochaeta capitata</i>. Our results also show <i>Omalotheca supina</i>, <i>O. norvegica</i> and <i>O. sylvatica</i>, which were placed by some authors in <i>Gamochaeta</i> or in <i>Gnaphalium</i>, form a monophyletic group distantly related to both genera.Facultad de Ciencias Agrarias y Forestales2016-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1047-1066http://sedici.unlp.edu.ar/handle/10915/133379enginfo:eu-repo/semantics/altIdentifier/issn/0378-2697info:eu-repo/semantics/altIdentifier/issn/2199-6881info:eu-repo/semantics/altIdentifier/issn/1615-6110info:eu-repo/semantics/altIdentifier/doi/10.1007/s00606-016-1316-4info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:31:52Zoai:sedici.unlp.edu.ar:10915/133379Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:31:52.506SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
title New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
spellingShingle New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
Urtubey, Estrella
Ciencias Agrarias
Gamochaetopsis
Omalotheca
Stuckertiella
ETS
ITS
trnL-F
title_short New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
title_full New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
title_fullStr New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
title_full_unstemmed New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
title_sort New circumscription of the genus <i>Gamochaeta</i> (Asteraceae, Gnaphalieae) inferred from nuclear and plastid DNA sequences
dc.creator.none.fl_str_mv Urtubey, Estrella
López, Alicia Beatriz
Chemisquy, Maria Amelia
Anderberg, Arne A.
Baeza, Carlos M.
Bayón, Néstor David
Deble, Leonardo Paz
Moreira-Muñoz, Andrés
Nesom, Guy L.
Alford, Mac H.
Salomón, Luciana
Freire, Susana Edith
author Urtubey, Estrella
author_facet Urtubey, Estrella
López, Alicia Beatriz
Chemisquy, Maria Amelia
Anderberg, Arne A.
Baeza, Carlos M.
Bayón, Néstor David
Deble, Leonardo Paz
Moreira-Muñoz, Andrés
Nesom, Guy L.
Alford, Mac H.
Salomón, Luciana
Freire, Susana Edith
author_role author
author2 López, Alicia Beatriz
Chemisquy, Maria Amelia
Anderberg, Arne A.
Baeza, Carlos M.
Bayón, Néstor David
Deble, Leonardo Paz
Moreira-Muñoz, Andrés
Nesom, Guy L.
Alford, Mac H.
Salomón, Luciana
Freire, Susana Edith
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Agrarias
Gamochaetopsis
Omalotheca
Stuckertiella
ETS
ITS
trnL-F
topic Ciencias Agrarias
Gamochaetopsis
Omalotheca
Stuckertiella
ETS
ITS
trnL-F
dc.description.none.fl_txt_mv <i>Gamochaeta</i> (tribe Gnaphalieae, Asteraceae) is composed of ca. 60 species primarily distributed in tropical and subtropical America. Within the tribe Gnaphalieae, the genus is characterized by capitula arranged in spikes or head-like clusters, few hermaphroditic central florets, truncate style branches with apical sweeping trichomes, pappus bristles connate at the base into a ring falling as a unit, and achenes with globose twin trichomes. Previous molecular phylogenetic studies have suggested the paraphyly of the genus, but have not provided a basis for redefining 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 analyzed from a broad taxon sample representing the full range of morphological variation known in the genus. Our results affirm that <i>Gamochaeta</i> is paraphyletic as presently circumscribed. Two clades can be recognized: one clade that includes the majority of the species currently assigned to <i>Gamochaeta</i> and a second clade that includes <i>Gamochaetopsis</i>, <i>Stuckertiella</i> and seven species of <i>Gamochaeta</i>. We present here a new circumscription of <i>Gamochaeta</i>, including two new combinations, <i>Gamochaeta alpina</i> and <i>Gamochaeta peregrina</i>, and the resurrection of <i>Gamochaeta capitata</i>. Our results also show <i>Omalotheca supina</i>, <i>O. norvegica</i> and <i>O. sylvatica</i>, which were placed by some authors in <i>Gamochaeta</i> or in <i>Gnaphalium</i>, form a monophyletic group distantly related to both genera.
Facultad de Ciencias Agrarias y Forestales
description <i>Gamochaeta</i> (tribe Gnaphalieae, Asteraceae) is composed of ca. 60 species primarily distributed in tropical and subtropical America. Within the tribe Gnaphalieae, the genus is characterized by capitula arranged in spikes or head-like clusters, few hermaphroditic central florets, truncate style branches with apical sweeping trichomes, pappus bristles connate at the base into a ring falling as a unit, and achenes with globose twin trichomes. Previous molecular phylogenetic studies have suggested the paraphyly of the genus, but have not provided a basis for redefining 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 analyzed from a broad taxon sample representing the full range of morphological variation known in the genus. Our results affirm that <i>Gamochaeta</i> is paraphyletic as presently circumscribed. Two clades can be recognized: one clade that includes the majority of the species currently assigned to <i>Gamochaeta</i> and a second clade that includes <i>Gamochaetopsis</i>, <i>Stuckertiella</i> and seven species of <i>Gamochaeta</i>. We present here a new circumscription of <i>Gamochaeta</i>, including two new combinations, <i>Gamochaeta alpina</i> and <i>Gamochaeta peregrina</i>, and the resurrection of <i>Gamochaeta capitata</i>. Our results also show <i>Omalotheca supina</i>, <i>O. norvegica</i> and <i>O. sylvatica</i>, which were placed by some authors in <i>Gamochaeta</i> or in <i>Gnaphalium</i>, form a monophyletic group distantly related to both genera.
publishDate 2016
dc.date.none.fl_str_mv 2016-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/133379
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dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/issn/2199-6881
info:eu-repo/semantics/altIdentifier/issn/1615-6110
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00606-016-1316-4
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
1047-1066
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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