Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin

Detalhes bibliográficos
Autor(a) principal: Nakayama, Celeste Mutuko
Data de Publicação: 2012
Outros Autores: Feldberg, Eliana, Bertollo, Luiz Antônio Carlos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional do INPA
Texto Completo: https://repositorio.inpa.gov.br/handle/1/14597
Resumo: Six species of Serrasalmidae from the central Amazon, representatives of the genera Serrasalmus (S. elongatus, S. maculatus, S. cf. rhombeus, and S. rhombeus), Pygocentrus (P. nattereri), and Colossoma (C. macropomum), were analyzed regarding the distribution of the Ag-NORs, C-positive heterochromatin and 18S and 5S rRNA genes on the chromosomes. All specimens had 2n = 60 chromosomes, except S. cf. rhombeus, with 2n = 58, and C. macropomum with 2n = 54 chromosomes. The Ag-NORs were multiple and located on the short arms of subtelo-acrocentric chromosomes in all Serrasalmus species and in P. nattereri, but were found on metacentric chromosomes in C. macropomum. The 18S rDNA sites were usually coincident with Ag-NORs, although some species had a higher number and/or a distinct localization of these sites. C-positive heterochromatin was preferentially situated in centromeric regions, remarkably on metacentric pair number 7 in all Serrasalmus species and number 3 in P. nattereri, which beared a conspicuous proximal C-band on the long arms. The 5S rDNA sites were detected in a single chromosomal pair in all species. In Serrasalmus and P. nattereri, this pair was the number 7 and 3, respectively, thereby revealing its co-localization with the conspicuous heterochromatic band. However, in C. macropomum, only one homologue (probably belonging to pair number 12) exhibited 5S rDNA sites on the short arms, close to the centromere. The present data revealed reliable cytotaxonomic markers, enabling the evaluation of karyotype differentiation and interrelationships among Serrasalmidae, as well as the probable occurrence of a species complex in S. rhombeus. © 2012 Sociedade Brasileira de Ictiologia.
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spelling Nakayama, Celeste MutukoFeldberg, ElianaBertollo, Luiz Antônio Carlos2020-04-24T16:55:11Z2020-04-24T16:55:11Z2012https://repositorio.inpa.gov.br/handle/1/1459710.1590/S1679-62252012000100005Six species of Serrasalmidae from the central Amazon, representatives of the genera Serrasalmus (S. elongatus, S. maculatus, S. cf. rhombeus, and S. rhombeus), Pygocentrus (P. nattereri), and Colossoma (C. macropomum), were analyzed regarding the distribution of the Ag-NORs, C-positive heterochromatin and 18S and 5S rRNA genes on the chromosomes. All specimens had 2n = 60 chromosomes, except S. cf. rhombeus, with 2n = 58, and C. macropomum with 2n = 54 chromosomes. The Ag-NORs were multiple and located on the short arms of subtelo-acrocentric chromosomes in all Serrasalmus species and in P. nattereri, but were found on metacentric chromosomes in C. macropomum. The 18S rDNA sites were usually coincident with Ag-NORs, although some species had a higher number and/or a distinct localization of these sites. C-positive heterochromatin was preferentially situated in centromeric regions, remarkably on metacentric pair number 7 in all Serrasalmus species and number 3 in P. nattereri, which beared a conspicuous proximal C-band on the long arms. The 5S rDNA sites were detected in a single chromosomal pair in all species. In Serrasalmus and P. nattereri, this pair was the number 7 and 3, respectively, thereby revealing its co-localization with the conspicuous heterochromatic band. However, in C. macropomum, only one homologue (probably belonging to pair number 12) exhibited 5S rDNA sites on the short arms, close to the centromere. The present data revealed reliable cytotaxonomic markers, enabling the evaluation of karyotype differentiation and interrelationships among Serrasalmidae, as well as the probable occurrence of a species complex in S. rhombeus. © 2012 Sociedade Brasileira de Ictiologia.Volume 10, Número 1, Pags. 53-58Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessCharaciformesColossomaColossoma MacropomumPygocentrusPygocentrus NattereriSerrasalmidaeSerrasalmusSerrasalmus RhombeusKaryotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basininfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleNeotropical Ichthyologyengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfapplication/pdf207581https://repositorio.inpa.gov.br/bitstream/1/14597/1/artigo-inpa.pdfa246bee51072c5fc329fa3db598f2252MD51CC-LICENSElicense_rdfapplication/octet-stream914https://repositorio.inpa.gov.br/bitstream/1/14597/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD521/145972020-07-14 09:13:46.797oai:repositorio:1/14597Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-14T13:13:46Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false
dc.title.en.fl_str_mv Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
title Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
spellingShingle Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
Nakayama, Celeste Mutuko
Characiformes
Colossoma
Colossoma Macropomum
Pygocentrus
Pygocentrus Nattereri
Serrasalmidae
Serrasalmus
Serrasalmus Rhombeus
title_short Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
title_full Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
title_fullStr Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
title_full_unstemmed Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
title_sort Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin
author Nakayama, Celeste Mutuko
author_facet Nakayama, Celeste Mutuko
Feldberg, Eliana
Bertollo, Luiz Antônio Carlos
author_role author
author2 Feldberg, Eliana
Bertollo, Luiz Antônio Carlos
author2_role author
author
dc.contributor.author.fl_str_mv Nakayama, Celeste Mutuko
Feldberg, Eliana
Bertollo, Luiz Antônio Carlos
dc.subject.eng.fl_str_mv Characiformes
Colossoma
Colossoma Macropomum
Pygocentrus
Pygocentrus Nattereri
Serrasalmidae
Serrasalmus
Serrasalmus Rhombeus
topic Characiformes
Colossoma
Colossoma Macropomum
Pygocentrus
Pygocentrus Nattereri
Serrasalmidae
Serrasalmus
Serrasalmus Rhombeus
description Six species of Serrasalmidae from the central Amazon, representatives of the genera Serrasalmus (S. elongatus, S. maculatus, S. cf. rhombeus, and S. rhombeus), Pygocentrus (P. nattereri), and Colossoma (C. macropomum), were analyzed regarding the distribution of the Ag-NORs, C-positive heterochromatin and 18S and 5S rRNA genes on the chromosomes. All specimens had 2n = 60 chromosomes, except S. cf. rhombeus, with 2n = 58, and C. macropomum with 2n = 54 chromosomes. The Ag-NORs were multiple and located on the short arms of subtelo-acrocentric chromosomes in all Serrasalmus species and in P. nattereri, but were found on metacentric chromosomes in C. macropomum. The 18S rDNA sites were usually coincident with Ag-NORs, although some species had a higher number and/or a distinct localization of these sites. C-positive heterochromatin was preferentially situated in centromeric regions, remarkably on metacentric pair number 7 in all Serrasalmus species and number 3 in P. nattereri, which beared a conspicuous proximal C-band on the long arms. The 5S rDNA sites were detected in a single chromosomal pair in all species. In Serrasalmus and P. nattereri, this pair was the number 7 and 3, respectively, thereby revealing its co-localization with the conspicuous heterochromatic band. However, in C. macropomum, only one homologue (probably belonging to pair number 12) exhibited 5S rDNA sites on the short arms, close to the centromere. The present data revealed reliable cytotaxonomic markers, enabling the evaluation of karyotype differentiation and interrelationships among Serrasalmidae, as well as the probable occurrence of a species complex in S. rhombeus. © 2012 Sociedade Brasileira de Ictiologia.
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2020-04-24T16:55:11Z
dc.date.available.fl_str_mv 2020-04-24T16:55:11Z
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dc.identifier.uri.fl_str_mv https://repositorio.inpa.gov.br/handle/1/14597
dc.identifier.doi.none.fl_str_mv 10.1590/S1679-62252012000100005
url https://repositorio.inpa.gov.br/handle/1/14597
identifier_str_mv 10.1590/S1679-62252012000100005
dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Volume 10, Número 1, Pags. 53-58
dc.rights.driver.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
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dc.publisher.none.fl_str_mv Neotropical Ichthyology
publisher.none.fl_str_mv Neotropical Ichthyology
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