Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil

Hypochaeris is an excellent system for studying different modes of chromosome evolution in plants. We carried out a cytogenetic analysis on populations of 2 Hypochaeris species, comprising 10 populations of H. catharinensis and 5 of H. lutea, to assess possible changes on chromosome organization in...

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Autores: Fiorin, Fernando Gianetti, Ruas, Paulo Maurício, Ortiz Herrera, María Ángeles, Urtubey, Estrella, Matzenbacher, Nelson Ivo, Ruas, Claudete De Fátima
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/107687
Acceso en línea:https://hdl.handle.net/11441/107687
https://doi.org/10.4238/2013.January.4.4
Access Level:acceso abierto
Palabra clave:Asteraceae
Chromomycin A3 banding
Karyotype evolution
Polyploidy
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spelling Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern BrazilFiorin, Fernando GianettiRuas, Paulo MaurícioOrtiz Herrera, María ÁngelesUrtubey, EstrellaMatzenbacher, Nelson IvoRuas, Claudete De FátimaAsteraceaeChromomycin A3 bandingKaryotype evolutionPolyploidyHypochaeris is an excellent system for studying different modes of chromosome evolution in plants. We carried out a cytogenetic analysis on populations of 2 Hypochaeris species, comprising 10 populations of H. catharinensis and 5 of H. lutea, to assess possible changes on chromosome organization in this interesting genus. Conventional Feulgen staining and fluorescent banding revealed that the general aspects of chromosome morphology for all populations of both species were similar, evidence of the typical bimodal karyotypes with 2n = 8 chromosomes that characterize the South American Hypochaeris. Comparative analysis of the karyotypes identified minor variations in the absolute size and arm ratio of corresponding chromosome pairs. One population of H. lutea was entirely polyploid adding a novel cytotype to this species. Fluorescent banding revealed strong chromomycin A3 (CMA3)-positive signals on both arms of chromosomes 3 and 4 of H. catharinensis, revealing a new pattern for the distribution of GC-rich heterochromatin in Hypochaeris. A strong CMA-positive signal was observed on the short arm of chromosome 3 in one population of H. lutea, while the other populations validated the CMA3 pattern already described for this species. While the overall karyotype similarities of the 2 species are in compass with all South American Hypochaeris, the presence of unusual large blocks of GC-rich heterochromatin suggests that chromosome rearrangements, related to dispersion of heterochromatin, are taking place in the karyotype of H. catharinensis. The novel polyploid cytotype identified in H. lutea provides support that polyploidization is an active process in the mode of chromosome evolution in Hypochaeris.Conselho Nacional de Desenvolvimento Científico e Tecnológico #201254/2003-4, #201332/2003-5Fundacao de Pesquisas Cientificas de Ribeirao PretoBiología Vegetal y Ecología2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/107687https://doi.org/10.4238/2013.January.4.4reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésGenetics and Molecular Research, 12 (2), 1849-1858.#201254/2003-4#201332/2003-5http://dx.doi.org/10.4238/2013.January.4.4info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1076872026-06-17T12:51:07Z
dc.title.none.fl_str_mv Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
title Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
spellingShingle Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
Fiorin, Fernando Gianetti
Asteraceae
Chromomycin A3 banding
Karyotype evolution
Polyploidy
title_short Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
title_full Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
title_fullStr Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
title_full_unstemmed Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
title_sort Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), asteraceae, endemics to southern Brazil
dc.creator.none.fl_str_mv Fiorin, Fernando Gianetti
Ruas, Paulo Maurício
Ortiz Herrera, María Ángeles
Urtubey, Estrella
Matzenbacher, Nelson Ivo
Ruas, Claudete De Fátima
author Fiorin, Fernando Gianetti
author_facet Fiorin, Fernando Gianetti
Ruas, Paulo Maurício
Ortiz Herrera, María Ángeles
Urtubey, Estrella
Matzenbacher, Nelson Ivo
Ruas, Claudete De Fátima
author_role author
author2 Ruas, Paulo Maurício
Ortiz Herrera, María Ángeles
Urtubey, Estrella
Matzenbacher, Nelson Ivo
Ruas, Claudete De Fátima
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Biología Vegetal y Ecología
dc.subject.none.fl_str_mv Asteraceae
Chromomycin A3 banding
Karyotype evolution
Polyploidy
topic Asteraceae
Chromomycin A3 banding
Karyotype evolution
Polyploidy
description Hypochaeris is an excellent system for studying different modes of chromosome evolution in plants. We carried out a cytogenetic analysis on populations of 2 Hypochaeris species, comprising 10 populations of H. catharinensis and 5 of H. lutea, to assess possible changes on chromosome organization in this interesting genus. Conventional Feulgen staining and fluorescent banding revealed that the general aspects of chromosome morphology for all populations of both species were similar, evidence of the typical bimodal karyotypes with 2n = 8 chromosomes that characterize the South American Hypochaeris. Comparative analysis of the karyotypes identified minor variations in the absolute size and arm ratio of corresponding chromosome pairs. One population of H. lutea was entirely polyploid adding a novel cytotype to this species. Fluorescent banding revealed strong chromomycin A3 (CMA3)-positive signals on both arms of chromosomes 3 and 4 of H. catharinensis, revealing a new pattern for the distribution of GC-rich heterochromatin in Hypochaeris. A strong CMA-positive signal was observed on the short arm of chromosome 3 in one population of H. lutea, while the other populations validated the CMA3 pattern already described for this species. While the overall karyotype similarities of the 2 species are in compass with all South American Hypochaeris, the presence of unusual large blocks of GC-rich heterochromatin suggests that chromosome rearrangements, related to dispersion of heterochromatin, are taking place in the karyotype of H. catharinensis. The novel polyploid cytotype identified in H. lutea provides support that polyploidization is an active process in the mode of chromosome evolution in Hypochaeris.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/107687
https://doi.org/10.4238/2013.January.4.4
url https://hdl.handle.net/11441/107687
https://doi.org/10.4238/2013.January.4.4
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Genetics and Molecular Research, 12 (2), 1849-1858.
#201254/2003-4
#201332/2003-5
http://dx.doi.org/10.4238/2013.January.4.4
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Fundacao de Pesquisas Cientificas de Ribeirao Preto
publisher.none.fl_str_mv Fundacao de Pesquisas Cientificas de Ribeirao Preto
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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