Artigo

Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil)

We analyzed the karyotypes of three specimens of fi shes of the genus Hypostomus Lacépède, 1803 (Loricaridae) from Xingu River (Amazon region). We used conventional staining techniques, including C-banding, Ag-NOR staining, CMA3- and DAPI-banding. Each specimen had a different cytotype: Hypostomus s...

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Autor principal: Milhomem, Susana Suely Rodrigues
Outros Autores: Castro, R. R., Nagamachi, Cleusa Yoshiko, Souza, Augusto C.Paes de, Feldberg, Eliana, Pieczarka, Júlio César
Grau: Artigo
Idioma: English
Publicado em: Comparative Cytogenetics 2020
Assuntos:
Hypostomus
Hypostomus Sp.
Loricariidae
Siluriformes
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/16278
id oai:repositorio:1-16278
recordtype dspace
spelling oai:repositorio:1-16278 Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil) Milhomem, Susana Suely Rodrigues Castro, R. R. Nagamachi, Cleusa Yoshiko Souza, Augusto C.Paes de Feldberg, Eliana Pieczarka, Júlio César Hypostomus Hypostomus Sp. Loricariidae Siluriformes We analyzed the karyotypes of three specimens of fi shes of the genus Hypostomus Lacépède, 1803 (Loricaridae) from Xingu River (Amazon region). We used conventional staining techniques, including C-banding, Ag-NOR staining, CMA3- and DAPI-banding. Each specimen had a different cytotype: Hypostomus sp. Xingu-1 had 2n=64 (32M/SM, 32ST/A); Hypostomus sp. Xingu-2 has 2n=66 (32M/SM, 34ST/A), and Hypostomus sp. Xingu-3 had 2n=65 (38M/SM, 26ST/A + 1 B). The three cytotypes showed similar C-, CMA3- and DAPI-banding patterns. The nucleolus organizing regions were located in the short arm of chromosome pair 25 of Hypostomus sp. Xingu-1 and pair 29 of Hypostomus sp. Xingu-2, and in the long arm of pair 30 of Hypostomus sp. Xingu-3, probably because of a pericentric inversion. A fusion/fi ssion rearrangement explains the difference in the diploid number and number of M/SM and ST/A chromosomes between the 2n= 64 and 2n=66 cytotypes. The B chromosome most probably explains the difference between the 2n= 64 and 2n=65 cytotypes. The cytotype with 2n=65 had a signifi cantly larger number of M/SM chromosomes, probably because of pericentric inversions. These three cytotypes may represent different species. © Comparative Cytogenetics. 2020-06-02T20:08:35Z 2020-06-02T20:08:35Z 2010 Artigo https://repositorio.inpa.gov.br/handle/1/16278 10.3897/compcytogen.v4i1.31 en Volume 4, Número 1, Pags. 45-54 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Comparative Cytogenetics
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Hypostomus
Hypostomus Sp.
Loricariidae
Siluriformes
spellingShingle Hypostomus
Hypostomus Sp.
Loricariidae
Siluriformes
Milhomem, Susana Suely Rodrigues
Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil)
topic_facet Hypostomus
Hypostomus Sp.
Loricariidae
Siluriformes
description We analyzed the karyotypes of three specimens of fi shes of the genus Hypostomus Lacépède, 1803 (Loricaridae) from Xingu River (Amazon region). We used conventional staining techniques, including C-banding, Ag-NOR staining, CMA3- and DAPI-banding. Each specimen had a different cytotype: Hypostomus sp. Xingu-1 had 2n=64 (32M/SM, 32ST/A); Hypostomus sp. Xingu-2 has 2n=66 (32M/SM, 34ST/A), and Hypostomus sp. Xingu-3 had 2n=65 (38M/SM, 26ST/A + 1 B). The three cytotypes showed similar C-, CMA3- and DAPI-banding patterns. The nucleolus organizing regions were located in the short arm of chromosome pair 25 of Hypostomus sp. Xingu-1 and pair 29 of Hypostomus sp. Xingu-2, and in the long arm of pair 30 of Hypostomus sp. Xingu-3, probably because of a pericentric inversion. A fusion/fi ssion rearrangement explains the difference in the diploid number and number of M/SM and ST/A chromosomes between the 2n= 64 and 2n=66 cytotypes. The B chromosome most probably explains the difference between the 2n= 64 and 2n=65 cytotypes. The cytotype with 2n=65 had a signifi cantly larger number of M/SM chromosomes, probably because of pericentric inversions. These three cytotypes may represent different species. © Comparative Cytogenetics.
format Artigo
author Milhomem, Susana Suely Rodrigues
author2 Castro, R. R.
Nagamachi, Cleusa Yoshiko
Souza, Augusto C.Paes de
Feldberg, Eliana
Pieczarka, Júlio César
author2Str Castro, R. R.
Nagamachi, Cleusa Yoshiko
Souza, Augusto C.Paes de
Feldberg, Eliana
Pieczarka, Júlio César
title Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil)
title_short Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil)
title_full Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil)
title_fullStr Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil)
title_full_unstemmed Different cytotypes in fi shes of the genus Hypostomus Lcépède, 1803, (Siluriformes: Loricariidae) from Xingu river (Amazon region, Brazil)
title_sort different cytotypes in fi shes of the genus hypostomus lcépède, 1803, (siluriformes: loricariidae) from xingu river (amazon region, brazil)
publisher Comparative Cytogenetics
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/16278
_version_ 1787143341610106880
score 11.755432

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