Natural hybrids in Senecio (Asteraceae): new records from Argentina

Autores
Lopez, Mariana Gabriela; Wulff, Arturo Federico; Xifreda, C. C.
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Hybridisation is very common within Senecio. It is considered a fundamental mechanism of speciation and also a major feature causing systematic complexity. Morphological features are the preliminary characteristics used to identify hybrids; however this approach is usually not sufficient when this is the case chromosome studies represent a valuable tool for reinforcing the observations. Two natural homoploid interspecific hybrids are reported here: Senecio 6 lulioi M. G. Lo´pez et Xifreda (S. brasiliensis (Spreng.) Less. 6S. grisebachii Baker) and Senecio 6piepaloensis M. G. Lo´pez et Xifreda (S. ragonesei Cabrera6 S. sectilis Griseb.). Classic cytogenetic analysis and pollen stainability were performed to evaluate hybrid origins and to designate the putative parents. S. 6lulioi presented a low frequency of quadrivalents and heteromorphic bivalents, both strong evidences of hybridisation between closely related species. S.6 piepaloensis exhibited a high frequency of meiotic irregularities, and reduced pollen stainability, certain characteristics of hybrids. This analysis is discussed in relation to the role of hybridisation in the evolution of the genus, and its systematic significance.
Fil: Lopez, Mariana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina
Fil: Wulff, Arturo Federico. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Xifreda, C. C.. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Etnobotánica y Botánica Aplicada; Argentina
Materia
Senecio
cytogenetics
hybrids
meitoic irregularities
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/244618
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Natural hybrids in Senecio (Asteraceae): new records from ArgentinaLopez, Mariana GabrielaWulff, Arturo FedericoXifreda, C. C.Seneciocytogeneticshybridsmeitoic irregularitieshttps://purl.org/becyt/ford/2.9https://purl.org/becyt/ford/2Hybridisation is very common within Senecio. It is considered a fundamental mechanism of speciation and also a major feature causing systematic complexity. Morphological features are the preliminary characteristics used to identify hybrids; however this approach is usually not sufficient when this is the case chromosome studies represent a valuable tool for reinforcing the observations. Two natural homoploid interspecific hybrids are reported here: Senecio 6 lulioi M. G. Lo´pez et Xifreda (S. brasiliensis (Spreng.) Less. 6S. grisebachii Baker) and Senecio 6piepaloensis M. G. Lo´pez et Xifreda (S. ragonesei Cabrera6 S. sectilis Griseb.). Classic cytogenetic analysis and pollen stainability were performed to evaluate hybrid origins and to designate the putative parents. S. 6lulioi presented a low frequency of quadrivalents and heteromorphic bivalents, both strong evidences of hybridisation between closely related species. S.6 piepaloensis exhibited a high frequency of meiotic irregularities, and reduced pollen stainability, certain characteristics of hybrids. This analysis is discussed in relation to the role of hybridisation in the evolution of the genus, and its systematic significance.Fil: Lopez, Mariana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; ArgentinaFil: Wulff, Arturo Federico. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Xifreda, C. C.. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Etnobotánica y Botánica Aplicada; ArgentinaTaylor & Francis Ltd2008-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/244618Lopez, Mariana Gabriela; Wulff, Arturo Federico; Xifreda, C. C.; Natural hybrids in Senecio (Asteraceae): new records from Argentina; Taylor & Francis Ltd; Plant Biosystems; 142; 1; 3-2008; 186-1911126-3504CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/11263500701873075info:eu-repo/semantics/altIdentifier/doi/10.1080/11263500701873075info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:26:57Zoai:ri.conicet.gov.ar:11336/244618instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:26:57.982CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Natural hybrids in Senecio (Asteraceae): new records from Argentina
title Natural hybrids in Senecio (Asteraceae): new records from Argentina
spellingShingle Natural hybrids in Senecio (Asteraceae): new records from Argentina
Lopez, Mariana Gabriela
Senecio
cytogenetics
hybrids
meitoic irregularities
title_short Natural hybrids in Senecio (Asteraceae): new records from Argentina
title_full Natural hybrids in Senecio (Asteraceae): new records from Argentina
title_fullStr Natural hybrids in Senecio (Asteraceae): new records from Argentina
title_full_unstemmed Natural hybrids in Senecio (Asteraceae): new records from Argentina
title_sort Natural hybrids in Senecio (Asteraceae): new records from Argentina
dc.creator.none.fl_str_mv Lopez, Mariana Gabriela
Wulff, Arturo Federico
Xifreda, C. C.
author Lopez, Mariana Gabriela
author_facet Lopez, Mariana Gabriela
Wulff, Arturo Federico
Xifreda, C. C.
author_role author
author2 Wulff, Arturo Federico
Xifreda, C. C.
author2_role author
author
dc.subject.none.fl_str_mv Senecio
cytogenetics
hybrids
meitoic irregularities
topic Senecio
cytogenetics
hybrids
meitoic irregularities
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.9
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Hybridisation is very common within Senecio. It is considered a fundamental mechanism of speciation and also a major feature causing systematic complexity. Morphological features are the preliminary characteristics used to identify hybrids; however this approach is usually not sufficient when this is the case chromosome studies represent a valuable tool for reinforcing the observations. Two natural homoploid interspecific hybrids are reported here: Senecio 6 lulioi M. G. Lo´pez et Xifreda (S. brasiliensis (Spreng.) Less. 6S. grisebachii Baker) and Senecio 6piepaloensis M. G. Lo´pez et Xifreda (S. ragonesei Cabrera6 S. sectilis Griseb.). Classic cytogenetic analysis and pollen stainability were performed to evaluate hybrid origins and to designate the putative parents. S. 6lulioi presented a low frequency of quadrivalents and heteromorphic bivalents, both strong evidences of hybridisation between closely related species. S.6 piepaloensis exhibited a high frequency of meiotic irregularities, and reduced pollen stainability, certain characteristics of hybrids. This analysis is discussed in relation to the role of hybridisation in the evolution of the genus, and its systematic significance.
Fil: Lopez, Mariana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina
Fil: Wulff, Arturo Federico. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Xifreda, C. C.. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Etnobotánica y Botánica Aplicada; Argentina
description Hybridisation is very common within Senecio. It is considered a fundamental mechanism of speciation and also a major feature causing systematic complexity. Morphological features are the preliminary characteristics used to identify hybrids; however this approach is usually not sufficient when this is the case chromosome studies represent a valuable tool for reinforcing the observations. Two natural homoploid interspecific hybrids are reported here: Senecio 6 lulioi M. G. Lo´pez et Xifreda (S. brasiliensis (Spreng.) Less. 6S. grisebachii Baker) and Senecio 6piepaloensis M. G. Lo´pez et Xifreda (S. ragonesei Cabrera6 S. sectilis Griseb.). Classic cytogenetic analysis and pollen stainability were performed to evaluate hybrid origins and to designate the putative parents. S. 6lulioi presented a low frequency of quadrivalents and heteromorphic bivalents, both strong evidences of hybridisation between closely related species. S.6 piepaloensis exhibited a high frequency of meiotic irregularities, and reduced pollen stainability, certain characteristics of hybrids. This analysis is discussed in relation to the role of hybridisation in the evolution of the genus, and its systematic significance.
publishDate 2008
dc.date.none.fl_str_mv 2008-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/244618
Lopez, Mariana Gabriela; Wulff, Arturo Federico; Xifreda, C. C.; Natural hybrids in Senecio (Asteraceae): new records from Argentina; Taylor & Francis Ltd; Plant Biosystems; 142; 1; 3-2008; 186-191
1126-3504
CONICET Digital
CONICET
url http://hdl.handle.net/11336/244618
identifier_str_mv Lopez, Mariana Gabriela; Wulff, Arturo Federico; Xifreda, C. C.; Natural hybrids in Senecio (Asteraceae): new records from Argentina; Taylor & Francis Ltd; Plant Biosystems; 142; 1; 3-2008; 186-191
1126-3504
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.1080/11263500701873075
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis Ltd
publisher.none.fl_str_mv Taylor & Francis Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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