Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil

Autores
Fiorin, F. G.; Ruas, P. M.; Ortiz, M. A.; Urtubey, Estrella; Matzenbacher, N. I.; Ruas, C. F.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Fiorin, F. G.. Universidade Estadual de Londrina; Brasil
Fil: Ruas, P. M.. Universidade Estadual de Londrina; Brasil
Fil: Ortiz, M. A.. Universidad de Sevilla; España
Fil: Urtubey, Estrella. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion; Argentina
Fil: Matzenbacher, N. I.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Ruas, C. F.. Universidade Estadual de Londrina; Brasil
Materia
Hypochaeris
Karyotype
Populations
Brazil
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:11336/11463
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/11463
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern BrazilFiorin, F. G.Ruas, P. M.Ortiz, M. A.Urtubey, EstrellaMatzenbacher, N. I.Ruas, C. F.HypochaerisKaryotypePopulationsBrazilhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Hypochaeris 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.Fil: Fiorin, F. G.. Universidade Estadual de Londrina; BrasilFil: Ruas, P. M.. Universidade Estadual de Londrina; BrasilFil: Ortiz, M. A.. Universidad de Sevilla; EspañaFil: Urtubey, Estrella. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion; ArgentinaFil: Matzenbacher, N. I.. Universidade Federal do Rio Grande do Sul; BrasilFil: Ruas, C. F.. Universidade Estadual de Londrina; BrasilSociedade Brasileira de Genética2013-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/11463Fiorin, F. G.; Ruas, P. M.; Ortiz, M. A.; Urtubey, Estrella; Matzenbacher, N. I.; et al.; Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil; Sociedade Brasileira de Genética; Genetics And Molecular Biology; 12; 2; 1-2013; 1849-18581415-47571678-4685enginfo:eu-repo/semantics/altIdentifier/url/http://www.geneticsmr.com/articles/1999info:eu-repo/semantics/altIdentifier/doi/10.4238/2013.January.4.4info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:40:58Zoai:ri.conicet.gov.ar:11336/11463instacron: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:34982025-10-15 14:40:58.828CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
title Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
spellingShingle Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
Fiorin, F. G.
Hypochaeris
Karyotype
Populations
Brazil
title_short Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
title_full Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
title_fullStr Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
title_full_unstemmed Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
title_sort Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil
dc.creator.none.fl_str_mv Fiorin, F. G.
Ruas, P. M.
Ortiz, M. A.
Urtubey, Estrella
Matzenbacher, N. I.
Ruas, C. F.
author Fiorin, F. G.
author_facet Fiorin, F. G.
Ruas, P. M.
Ortiz, M. A.
Urtubey, Estrella
Matzenbacher, N. I.
Ruas, C. F.
author_role author
author2 Ruas, P. M.
Ortiz, M. A.
Urtubey, Estrella
Matzenbacher, N. I.
Ruas, C. F.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Hypochaeris
Karyotype
Populations
Brazil
topic Hypochaeris
Karyotype
Populations
Brazil
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Fiorin, F. G.. Universidade Estadual de Londrina; Brasil
Fil: Ruas, P. M.. Universidade Estadual de Londrina; Brasil
Fil: Ortiz, M. A.. Universidad de Sevilla; España
Fil: Urtubey, Estrella. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion; Argentina
Fil: Matzenbacher, N. I.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Ruas, C. F.. Universidade Estadual de Londrina; Brasil
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 2013-01
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/11336/11463
Fiorin, F. G.; Ruas, P. M.; Ortiz, M. A.; Urtubey, Estrella; Matzenbacher, N. I.; et al.; Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil; Sociedade Brasileira de Genética; Genetics And Molecular Biology; 12; 2; 1-2013; 1849-1858
1415-4757
1678-4685
url http://hdl.handle.net/11336/11463
identifier_str_mv Fiorin, F. G.; Ruas, P. M.; Ortiz, M. A.; Urtubey, Estrella; Matzenbacher, N. I.; et al.; Karyotype studies on populations of two Hypochaeris species (H. catharinensis and H. lutea), Asteraceae, from southern Brazil; Sociedade Brasileira de Genética; Genetics And Molecular Biology; 12; 2; 1-2013; 1849-1858
1415-4757
1678-4685
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.geneticsmr.com/articles/1999
info:eu-repo/semantics/altIdentifier/doi/10.4238/2013.January.4.4
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
dc.publisher.none.fl_str_mv Sociedade Brasileira de Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
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
_version_ 1846082904370708480
score 13.22299

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