Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes)
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Neotropical ichthyology (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100007 |
Resumo: | Karyotypic data are presented for four species of fish belonging to the Pimelodidae family. These species show a conserved diploid number, 2n = 56 chromosomes, with different karyotypic formulae. The analyzed species showed little amount of heterochromatin located preferentially in the centromeric and telomeric regions of some chromosomes. The nucleolus organizer regions activity (Ag-NORs) and the chromosomal location of ribosomal genes by fluorescent in situ hybridization (FISH), with 18S and 5S probes, showing only one chromosome pair marked bearer of ribosomal genes, the only exception was Pimelodus britskii that presented multiple NORs and syntenic location of the 18S and 5S probes. Non-Robertsonian events, as pericentric inversion and NORs duplication are requested to explain the karyotype diversification in Pseudoplatystoma from the rio Paraguay (MS), Pimelodus from the rio Iguaçu (PR), Sorubim from the rio Paraguay (MS) and Steindachneridion from the rio Paraíba do Sul (SP). The obtained data for the karyotype macrostructure of these species corroborates a conserved pattern observed in Pimelodidae. On the other hand, interspecific variations detected by molecular cytogenetics markers made possible cytotaxonomic inferences and differentiation of the species here analyzed. |
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Neotropical ichthyology (Online) |
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Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes)Pseudoplatystoma reticulatumPimelodus britskiiSorubim limaSteindachneridion parahybaeKaryotypic data are presented for four species of fish belonging to the Pimelodidae family. These species show a conserved diploid number, 2n = 56 chromosomes, with different karyotypic formulae. The analyzed species showed little amount of heterochromatin located preferentially in the centromeric and telomeric regions of some chromosomes. The nucleolus organizer regions activity (Ag-NORs) and the chromosomal location of ribosomal genes by fluorescent in situ hybridization (FISH), with 18S and 5S probes, showing only one chromosome pair marked bearer of ribosomal genes, the only exception was Pimelodus britskii that presented multiple NORs and syntenic location of the 18S and 5S probes. Non-Robertsonian events, as pericentric inversion and NORs duplication are requested to explain the karyotype diversification in Pseudoplatystoma from the rio Paraguay (MS), Pimelodus from the rio Iguaçu (PR), Sorubim from the rio Paraguay (MS) and Steindachneridion from the rio Paraíba do Sul (SP). The obtained data for the karyotype macrostructure of these species corroborates a conserved pattern observed in Pimelodidae. On the other hand, interspecific variations detected by molecular cytogenetics markers made possible cytotaxonomic inferences and differentiation of the species here analyzed.Sociedade Brasileira de Ictiologia2011-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100007Neotropical Ichthyology v.9 n.1 2011reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/S1679-62252011005000002info:eu-repo/semantics/openAccessMoraes Neto,AméricoSilva,Maelin daMatoso,Daniele AparecidaVicari,Marcelo RicardoAlmeida,Mara Cristina deCollares-Pereira,Maria JoãoArtoni,Roberto Ferreiraeng2011-05-24T00:00:00Zoai:scielo:S1679-62252011000100007Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2011-05-24T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) |
title |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) |
spellingShingle |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) Moraes Neto,Américo Pseudoplatystoma reticulatum Pimelodus britskii Sorubim lima Steindachneridion parahybae |
title_short |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) |
title_full |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) |
title_fullStr |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) |
title_full_unstemmed |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) |
title_sort |
Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) |
author |
Moraes Neto,Américo |
author_facet |
Moraes Neto,Américo Silva,Maelin da Matoso,Daniele Aparecida Vicari,Marcelo Ricardo Almeida,Mara Cristina de Collares-Pereira,Maria João Artoni,Roberto Ferreira |
author_role |
author |
author2 |
Silva,Maelin da Matoso,Daniele Aparecida Vicari,Marcelo Ricardo Almeida,Mara Cristina de Collares-Pereira,Maria João Artoni,Roberto Ferreira |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Moraes Neto,Américo Silva,Maelin da Matoso,Daniele Aparecida Vicari,Marcelo Ricardo Almeida,Mara Cristina de Collares-Pereira,Maria João Artoni,Roberto Ferreira |
dc.subject.por.fl_str_mv |
Pseudoplatystoma reticulatum Pimelodus britskii Sorubim lima Steindachneridion parahybae |
topic |
Pseudoplatystoma reticulatum Pimelodus britskii Sorubim lima Steindachneridion parahybae |
description |
Karyotypic data are presented for four species of fish belonging to the Pimelodidae family. These species show a conserved diploid number, 2n = 56 chromosomes, with different karyotypic formulae. The analyzed species showed little amount of heterochromatin located preferentially in the centromeric and telomeric regions of some chromosomes. The nucleolus organizer regions activity (Ag-NORs) and the chromosomal location of ribosomal genes by fluorescent in situ hybridization (FISH), with 18S and 5S probes, showing only one chromosome pair marked bearer of ribosomal genes, the only exception was Pimelodus britskii that presented multiple NORs and syntenic location of the 18S and 5S probes. Non-Robertsonian events, as pericentric inversion and NORs duplication are requested to explain the karyotype diversification in Pseudoplatystoma from the rio Paraguay (MS), Pimelodus from the rio Iguaçu (PR), Sorubim from the rio Paraguay (MS) and Steindachneridion from the rio Paraíba do Sul (SP). The obtained data for the karyotype macrostructure of these species corroborates a conserved pattern observed in Pimelodidae. On the other hand, interspecific variations detected by molecular cytogenetics markers made possible cytotaxonomic inferences and differentiation of the species here analyzed. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100007 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1679-62252011005000002 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
dc.source.none.fl_str_mv |
Neotropical Ichthyology v.9 n.1 2011 reponame:Neotropical ichthyology (Online) instname:Sociedade Brasileira de Ictiologia (SBI) instacron:SBI |
instname_str |
Sociedade Brasileira de Ictiologia (SBI) |
instacron_str |
SBI |
institution |
SBI |
reponame_str |
Neotropical ichthyology (Online) |
collection |
Neotropical ichthyology (Online) |
repository.name.fl_str_mv |
Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI) |
repository.mail.fl_str_mv |
||neoichth@nupelia.uem.br |
_version_ |
1752122179986653184 |