Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4238/vol9-1gmr750 http://hdl.handle.net/11449/18755 |
Resumo: | Among catfish species of the genus Rhamdia reported for the Brazilian territory, R. quelen is the most widespread, being found in nearly all hydrographic basins of Brazil. Nowadays, R. quelen is a synonym for at least 47 other species in this genus, its taxonomic status still being controversial. The available cytogenetic reports show a wide variation in the karyotypic macrostructure, with the frequent presence of supernumerary chromosomes. The remarkable cytogenetic variability associated with taxonomic issues in this species indicates that R. quelen is actually a species complex. In order to carry out a wide comparative cytogenetic study in R. quelen from southern and southeastern Brazil and examine a species complex, we analyzed the chromosomes of 14 populations from the main hydrographic basins of these two regions. Using classic and molecular cytogenetic techniques, we found seven distinct karyotypic formulae, all bearing 2n = 58 chromosomes. Supernumerary chromosomes were present in most of the populations; their number, size and C-banding pattern allowed us to differentiate populations with similar karyotypic compositions. We examined patterns of chromosomal evolution as well as the probable mechanisms involved in the origin and morphological differentiation of their supernumerary chromosomes. |
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Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomesKaryotypeSupernumerary chromosomesRhamdiaHeterochromatinNon-disjunctionAmong catfish species of the genus Rhamdia reported for the Brazilian territory, R. quelen is the most widespread, being found in nearly all hydrographic basins of Brazil. Nowadays, R. quelen is a synonym for at least 47 other species in this genus, its taxonomic status still being controversial. The available cytogenetic reports show a wide variation in the karyotypic macrostructure, with the frequent presence of supernumerary chromosomes. The remarkable cytogenetic variability associated with taxonomic issues in this species indicates that R. quelen is actually a species complex. In order to carry out a wide comparative cytogenetic study in R. quelen from southern and southeastern Brazil and examine a species complex, we analyzed the chromosomes of 14 populations from the main hydrographic basins of these two regions. Using classic and molecular cytogenetic techniques, we found seven distinct karyotypic formulae, all bearing 2n = 58 chromosomes. Supernumerary chromosomes were present in most of the populations; their number, size and C-banding pattern allowed us to differentiate populations with similar karyotypic compositions. We examined patterns of chromosomal evolution as well as the probable mechanisms involved in the origin and morphological differentiation of their supernumerary chromosomes.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ São Paulo, Dept Genet & Biol Evolut, São Paulo, BrazilUniv Estadual Paulista Julio de Mesquista Filho, Dept Morfol, Botucatu, SP, BrazilUniv Estadual Paulista Julio de Mesquista Filho, Dept Morfol, Botucatu, SP, BrazilFunpec-editoraUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Garcia, C.Oliveira, C. [UNESP]Almeida-Toledo, L. F.2014-05-20T13:52:32Z2014-05-20T13:52:32Z2010-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article365-384application/pdfhttp://dx.doi.org/10.4238/vol9-1gmr750Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 9, n. 1, p. 365-384, 2010.1676-5680http://hdl.handle.net/11449/1875510.4238/vol9-1gmr750WOS:000277326200032WOS000277326200032.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGenetics and Molecular Research0,439info:eu-repo/semantics/openAccess2023-10-22T06:06:37Zoai:repositorio.unesp.br:11449/18755Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:36:01.367320Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes |
title |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes |
spellingShingle |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes Garcia, C. Karyotype Supernumerary chromosomes Rhamdia Heterochromatin Non-disjunction |
title_short |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes |
title_full |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes |
title_fullStr |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes |
title_full_unstemmed |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes |
title_sort |
Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes |
author |
Garcia, C. |
author_facet |
Garcia, C. Oliveira, C. [UNESP] Almeida-Toledo, L. F. |
author_role |
author |
author2 |
Oliveira, C. [UNESP] Almeida-Toledo, L. F. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Garcia, C. Oliveira, C. [UNESP] Almeida-Toledo, L. F. |
dc.subject.por.fl_str_mv |
Karyotype Supernumerary chromosomes Rhamdia Heterochromatin Non-disjunction |
topic |
Karyotype Supernumerary chromosomes Rhamdia Heterochromatin Non-disjunction |
description |
Among catfish species of the genus Rhamdia reported for the Brazilian territory, R. quelen is the most widespread, being found in nearly all hydrographic basins of Brazil. Nowadays, R. quelen is a synonym for at least 47 other species in this genus, its taxonomic status still being controversial. The available cytogenetic reports show a wide variation in the karyotypic macrostructure, with the frequent presence of supernumerary chromosomes. The remarkable cytogenetic variability associated with taxonomic issues in this species indicates that R. quelen is actually a species complex. In order to carry out a wide comparative cytogenetic study in R. quelen from southern and southeastern Brazil and examine a species complex, we analyzed the chromosomes of 14 populations from the main hydrographic basins of these two regions. Using classic and molecular cytogenetic techniques, we found seven distinct karyotypic formulae, all bearing 2n = 58 chromosomes. Supernumerary chromosomes were present in most of the populations; their number, size and C-banding pattern allowed us to differentiate populations with similar karyotypic compositions. We examined patterns of chromosomal evolution as well as the probable mechanisms involved in the origin and morphological differentiation of their supernumerary chromosomes. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 2014-05-20T13:52:32Z 2014-05-20T13:52:32Z |
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 |
http://dx.doi.org/10.4238/vol9-1gmr750 Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 9, n. 1, p. 365-384, 2010. 1676-5680 http://hdl.handle.net/11449/18755 10.4238/vol9-1gmr750 WOS:000277326200032 WOS000277326200032.pdf |
url |
http://dx.doi.org/10.4238/vol9-1gmr750 http://hdl.handle.net/11449/18755 |
identifier_str_mv |
Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 9, n. 1, p. 365-384, 2010. 1676-5680 10.4238/vol9-1gmr750 WOS:000277326200032 WOS000277326200032.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Genetics and Molecular Research 0,439 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
365-384 application/pdf |
dc.publisher.none.fl_str_mv |
Funpec-editora |
publisher.none.fl_str_mv |
Funpec-editora |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1808128538404978688 |