Karyotypic evolution trends in Rhamdia quelen (Siluriformes, Heptapteridae) with considerations about the origin and differentiation of its supernumerary chromosomes

Detalhes bibliográficos
Autor(a) principal: Garcia, C.
Data de Publicação: 2010
Outros Autores: Oliveira, C. [UNESP], Almeida-Toledo, L. F.
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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spelling 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
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