Artigo

Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin

Cytogenetic studies were performed in Serrasalmus spilopleura, a piranha species, from three sampling sites in the Central Amazon basin: 1. Catalão; 2. Manacapuru, 3. Itacoatiara. All specimens displayed 2n = 60 chromosomes and no sexual chromosomal heteromorphism was found. However, by considering...

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Autor principal: Centofante, Liano
Outros Autores: Porto, Jorge Ivan Rebelo, Feldberg, Eliana
Grau: Artigo
Idioma: English
Publicado em: Caryologia 2020
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/19078
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spelling oai:repositorio:1-19078 Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin Centofante, Liano Porto, Jorge Ivan Rebelo Feldberg, Eliana Cytogenetic studies were performed in Serrasalmus spilopleura, a piranha species, from three sampling sites in the Central Amazon basin: 1. Catalão; 2. Manacapuru, 3. Itacoatiara. All specimens displayed 2n = 60 chromosomes and no sexual chromosomal heteromorphism was found. However, by considering the karyotypic formula, three cytotypes were identifyed: cytotype A consisted of 24M+20SM+4ST+12A, and was the most common being found in all three sampling sites; cytotype C consisted of 23M+21SM+4ST+12A, was found only in Catalão and differ from cytotype A by the presence of a heteroziguous inversion in the first chromosome pair and a distal heterocromatinization in the long arm of this same pair, probably caused by the rearrangement or due to a chromosomal adjustment; cytotype D consisted of 24M+20SM+4ST+12A, was found only in Manacapuru and differ from cytoytpe A by a heteroziguous size polymorphism on the second chromosome pair, probably due to a translocation. C-banding revealed the same constitutive heterochromatin pattern for the three cytotypes except for the chromosome pair that underwent pericentric inversion (cytotype C) which possessed different heterochromatic blocks. Analysis in the number of active nucleolar organizing regions (NORs) revealed no differentiationamong cytotypes and NOR-bearing chromosomes varied from 10–12 acrocentric chromosomes. © 2002 Taylor & Francis Group, LLC. 2020-06-15T22:05:12Z 2020-06-15T22:05:12Z 2002 Artigo https://repositorio.inpa.gov.br/handle/1/19078 10.1080/00087114.2002.10589256 en Volume 55, Número 1, Pags. 37-45 Restrito Caryologia
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
description Cytogenetic studies were performed in Serrasalmus spilopleura, a piranha species, from three sampling sites in the Central Amazon basin: 1. Catalão; 2. Manacapuru, 3. Itacoatiara. All specimens displayed 2n = 60 chromosomes and no sexual chromosomal heteromorphism was found. However, by considering the karyotypic formula, three cytotypes were identifyed: cytotype A consisted of 24M+20SM+4ST+12A, and was the most common being found in all three sampling sites; cytotype C consisted of 23M+21SM+4ST+12A, was found only in Catalão and differ from cytotype A by the presence of a heteroziguous inversion in the first chromosome pair and a distal heterocromatinization in the long arm of this same pair, probably caused by the rearrangement or due to a chromosomal adjustment; cytotype D consisted of 24M+20SM+4ST+12A, was found only in Manacapuru and differ from cytoytpe A by a heteroziguous size polymorphism on the second chromosome pair, probably due to a translocation. C-banding revealed the same constitutive heterochromatin pattern for the three cytotypes except for the chromosome pair that underwent pericentric inversion (cytotype C) which possessed different heterochromatic blocks. Analysis in the number of active nucleolar organizing regions (NORs) revealed no differentiationamong cytotypes and NOR-bearing chromosomes varied from 10–12 acrocentric chromosomes. © 2002 Taylor & Francis Group, LLC.
format Artigo
author Centofante, Liano
spellingShingle Centofante, Liano
Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin
author2 Porto, Jorge Ivan Rebelo
Feldberg, Eliana
author2Str Porto, Jorge Ivan Rebelo
Feldberg, Eliana
title Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin
title_short Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin
title_full Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin
title_fullStr Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin
title_full_unstemmed Chromosomal polymorphism in Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) from Central Amazon Basin
title_sort chromosomal polymorphism in serrasalmus spilopleura kner, 1858 (characidae, serrasalminae) from central amazon basin
publisher Caryologia
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/19078
_version_ 1787143941122949120
score 11.755432

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