Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae)

In the present study 16 populations belonging to 13 species of the genus Vernonia Schreb. were examined cytologically. In total, six different chromosome numbers, which represent three basic numbers: x = 10, x = 16 and x = 17, were found. These results include the first chromosome number reports for...

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Autores principales: Angulo, María Betiana, Dematteis, Massimiliano
Formato: Artículo
Lenguaje:Inglés
Publicado: Taylor & Francis 2025
Materias:
Chromosomes
Cytology
Evolution
Taxonomy
Vernonia
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/58885
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-58885
record_format dspace
spelling I48-R184-123456789-588852025-11-04T14:52:57Z Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae) Angulo, María Betiana Dematteis, Massimiliano Chromosomes Cytology Evolution Taxonomy Vernonia In the present study 16 populations belonging to 13 species of the genus Vernonia Schreb. were examined cytologically. In total, six different chromosome numbers, which represent three basic numbers: x = 10, x = 16 and x = 17, were found. These results include the first chromosome number reports for the following four species: V. lanifera Cristo´ bal & Dematt. (2n = 2x = 32), V. membranácea Gardner (2n = 2x = 34), V. salzmannii DC. (2n = 2x = 20) and V scabrifoliata Hieron. (2n = 2x = 128). Besides, a new chromosome number was found in V. saltensis Hieron. (2n = 2x = 32), for which only tetraploid populations have been previously recorded. The data obtained in this work, along with the information available from the literature, show that the genus Vernonia in South America is heterogeneous with basic chromosome numbers that range between x = 9 and x = 19. These numbers suggest that a combination of polyploidy and aneuploidy has played an important role in the evolution of the genus. 2025-11-03T12:26:42Z 2025-11-03T12:26:42Z 2009-03 Artículo Dematteis, Massimiliano y Angulo, María Betiana, 2009. Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae). Plant Biosystems. London: Taylor & Francis, vol. 143, no. 1, p. 20-24. E-ISSN 1724-5575. DOI https://doi.org/10.1080/11263500802633204 1126-3504 http://repositorio.unne.edu.ar/handle/123456789/58885 eng https://doi.org/10.1080/11263500802633204 openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 20-24 application/pdf Taylor & Francis Plant Biosystems, 2009, vol. 143, no. 1, p. 20-24.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Chromosomes
Cytology
Evolution
Taxonomy
Vernonia
spellingShingle Chromosomes
Cytology
Evolution
Taxonomy
Vernonia
Angulo, María Betiana
Dematteis, Massimiliano
Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae)
topic_facet Chromosomes
Cytology
Evolution
Taxonomy
Vernonia
description In the present study 16 populations belonging to 13 species of the genus Vernonia Schreb. were examined cytologically. In total, six different chromosome numbers, which represent three basic numbers: x = 10, x = 16 and x = 17, were found. These results include the first chromosome number reports for the following four species: V. lanifera Cristo´ bal & Dematt. (2n = 2x = 32), V. membranácea Gardner (2n = 2x = 34), V. salzmannii DC. (2n = 2x = 20) and V scabrifoliata Hieron. (2n = 2x = 128). Besides, a new chromosome number was found in V. saltensis Hieron. (2n = 2x = 32), for which only tetraploid populations have been previously recorded. The data obtained in this work, along with the information available from the literature, show that the genus Vernonia in South America is heterogeneous with basic chromosome numbers that range between x = 9 and x = 19. These numbers suggest that a combination of polyploidy and aneuploidy has played an important role in the evolution of the genus.
format Artículo
author Angulo, María Betiana
Dematteis, Massimiliano
author_facet Angulo, María Betiana
Dematteis, Massimiliano
author_sort Angulo, María Betiana
title Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae)
title_short Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae)
title_full Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae)
title_fullStr Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae)
title_full_unstemmed Caryological analysis of South American species of Vernonia (Vernonieae, Asteraceae)
title_sort caryological analysis of south american species of vernonia (vernonieae, asteraceae)
publisher Taylor & Francis
publishDate 2025
url http://repositorio.unne.edu.ar/handle/123456789/58885
work_keys_str_mv AT angulomariabetiana caryologicalanalysisofsouthamericanspeciesofvernoniavernonieaeasteraceae
AT dematteismassimiliano caryologicalanalysisofsouthamericanspeciesofvernoniavernonieaeasteraceae
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