Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae)
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/224420 |
Resumo: | Chromosome evolution, in the Bidens genus, was by polyploidy mechanisms. The basic number to the genus is X = 12 chromosomes, as all the Fitchinae subtribe. The association of chromosome number and environment in these plants was made some time ago, concerning the cytotypes of the species. In this paper, the chromosome number of nine Bidens pilosa populations was studied. The chromosome numbers found were 2n = 48, 70 and 72. In six of the nine populations analysed the most frequent number was 2n = 72. The lbiúna population had 2n = 70 chromosomes and two had the lowest chromosome number (2n = 48). Observations of the B. pilosa population suggests that ploidy levels were related to a geographical gradient establishing the environmental altitudes. The data showed that lower ploidy levels, that is 2n = 48, were found at lower altitudes, while the populations higher ploidy levels were found in several environments, over a wide distribution. |
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Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae)Bidens pilosaChromosome polymorphismCytotypeKaryotypePlant cytogeneticsChromosome evolution, in the Bidens genus, was by polyploidy mechanisms. The basic number to the genus is X = 12 chromosomes, as all the Fitchinae subtribe. The association of chromosome number and environment in these plants was made some time ago, concerning the cytotypes of the species. In this paper, the chromosome number of nine Bidens pilosa populations was studied. The chromosome numbers found were 2n = 48, 70 and 72. In six of the nine populations analysed the most frequent number was 2n = 72. The lbiúna population had 2n = 70 chromosomes and two had the lowest chromosome number (2n = 48). Observations of the B. pilosa population suggests that ploidy levels were related to a geographical gradient establishing the environmental altitudes. The data showed that lower ploidy levels, that is 2n = 48, were found at lower altitudes, while the populations higher ploidy levels were found in several environments, over a wide distribution.Departamento Biologia Geral Universidade Estadual de Londrina Campus Universitáio, Cx Postal 6001, Cep 86 051 970 Londrina, PRDepto. Cie. Biólogicas Faculdade de Ciências e Letras UNESP, Av Dom Antônio 2100, Cep 19 800 000 Assis, SPDepto. Cie. Biólogicas Faculdade de Ciências e Letras UNESP, Av Dom Antônio 2100, Cep 19 800 000 Assis, SPUniversidade Estadual de Londrina (UEL)Universidade Estadual Paulista (UNESP)Mariano, A. C.Marin-Morales, M. A. [UNESP]2022-04-28T19:56:28Z2022-04-28T19:56:28Z1999-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article45-60Cytobios, v. 1999, n. 384, p. 45-60, 1999.0011-4529http://hdl.handle.net/11449/2244202-s2.0-0346404207Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCytobiosinfo:eu-repo/semantics/openAccess2024-06-13T17:38:42Zoai:repositorio.unesp.br:11449/224420Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-06-13T17:38:42Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) |
title |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) |
spellingShingle |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) Mariano, A. C. Bidens pilosa Chromosome polymorphism Cytotype Karyotype Plant cytogenetics |
title_short |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) |
title_full |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) |
title_fullStr |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) |
title_full_unstemmed |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) |
title_sort |
Chromosome polymorphism and cytotype establishment in Bidens pilosa (Asteraceae) |
author |
Mariano, A. C. |
author_facet |
Mariano, A. C. Marin-Morales, M. A. [UNESP] |
author_role |
author |
author2 |
Marin-Morales, M. A. [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Londrina (UEL) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Mariano, A. C. Marin-Morales, M. A. [UNESP] |
dc.subject.por.fl_str_mv |
Bidens pilosa Chromosome polymorphism Cytotype Karyotype Plant cytogenetics |
topic |
Bidens pilosa Chromosome polymorphism Cytotype Karyotype Plant cytogenetics |
description |
Chromosome evolution, in the Bidens genus, was by polyploidy mechanisms. The basic number to the genus is X = 12 chromosomes, as all the Fitchinae subtribe. The association of chromosome number and environment in these plants was made some time ago, concerning the cytotypes of the species. In this paper, the chromosome number of nine Bidens pilosa populations was studied. The chromosome numbers found were 2n = 48, 70 and 72. In six of the nine populations analysed the most frequent number was 2n = 72. The lbiúna population had 2n = 70 chromosomes and two had the lowest chromosome number (2n = 48). Observations of the B. pilosa population suggests that ploidy levels were related to a geographical gradient establishing the environmental altitudes. The data showed that lower ploidy levels, that is 2n = 48, were found at lower altitudes, while the populations higher ploidy levels were found in several environments, over a wide distribution. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-12-01 2022-04-28T19:56:28Z 2022-04-28T19:56:28Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Cytobios, v. 1999, n. 384, p. 45-60, 1999. 0011-4529 http://hdl.handle.net/11449/224420 2-s2.0-0346404207 |
identifier_str_mv |
Cytobios, v. 1999, n. 384, p. 45-60, 1999. 0011-4529 2-s2.0-0346404207 |
url |
http://hdl.handle.net/11449/224420 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Cytobios |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
45-60 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803045473361068032 |