Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?

Four populations of Astyanax hastatus Myers 1928 from the Guapimirim River basin (Rio de Janeiro State) were analyzed and three distinct cytotypes identified. These cytotypes presented 2n = 50 chromosomes, with 4M+8SM+10ST+28A (Cytotype A), 8M+10SM+14ST+18A (Cytotype B), 6M+8SM+4ST+32A (Cytotype C)...

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Autores principales: Kavalco, Karine Frehner, de Oliveira Brandão, Karina, Pazza, Rubens, de Almeida-Toledo, Lurdes Foresti
Formato: Texto
Lenguaje:English
Publicado: Sociedade Brasileira de Genética 2009
Materias:
Animal Genetics
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3036056/
https://www.ncbi.nlm.nih.gov/pubmed/21637509
http://dx.doi.org/10.1590/S1415-47572009005000055
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author Kavalco, Karine Frehner
de Oliveira Brandão, Karina
Pazza, Rubens
de Almeida-Toledo, Lurdes Foresti
author_facet Kavalco, Karine Frehner
de Oliveira Brandão, Karina
Pazza, Rubens
de Almeida-Toledo, Lurdes Foresti
author_sort Kavalco, Karine Frehner
collection PubMed
description Four populations of Astyanax hastatus Myers 1928 from the Guapimirim River basin (Rio de Janeiro State) were analyzed and three distinct cytotypes identified. These cytotypes presented 2n = 50 chromosomes, with 4M+8SM+10ST+28A (Cytotype A), 8M+10SM+14ST+18A (Cytotype B), 6M+8SM+4ST+32A (Cytotype C) and scanty heterochromatin, mainly located throughout pericentromeric regions of several chromosomal pairs. No homologies with the As-51 satellite DNA were observed in the three cytotypes, although all of them presented multiple 18S rDNA sites, as detected by both silver nitrate staining and FISH (fluorescent in situ hybridization). The application of the term “species complex” in Astyanax is discussed from a cytotaxonomic viewpoint.
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spelling pubmed-30360562011-06-02 Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax? Kavalco, Karine Frehner de Oliveira Brandão, Karina Pazza, Rubens de Almeida-Toledo, Lurdes Foresti Genet Mol Biol Animal Genetics Four populations of Astyanax hastatus Myers 1928 from the Guapimirim River basin (Rio de Janeiro State) were analyzed and three distinct cytotypes identified. These cytotypes presented 2n = 50 chromosomes, with 4M+8SM+10ST+28A (Cytotype A), 8M+10SM+14ST+18A (Cytotype B), 6M+8SM+4ST+32A (Cytotype C) and scanty heterochromatin, mainly located throughout pericentromeric regions of several chromosomal pairs. No homologies with the As-51 satellite DNA were observed in the three cytotypes, although all of them presented multiple 18S rDNA sites, as detected by both silver nitrate staining and FISH (fluorescent in situ hybridization). The application of the term “species complex” in Astyanax is discussed from a cytotaxonomic viewpoint. Sociedade Brasileira de Genética 2009 2009-09-01 /pmc/articles/PMC3036056/ /pubmed/21637509 http://dx.doi.org/10.1590/S1415-47572009005000055 Text en Copyright © 2009, Sociedade Brasileira de Genética. http://creativecommons.org/licenses/by/2.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Animal Genetics
Kavalco, Karine Frehner
de Oliveira Brandão, Karina
Pazza, Rubens
de Almeida-Toledo, Lurdes Foresti
Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?
title Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?
title_full Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?
title_fullStr Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?
title_full_unstemmed Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?
title_short Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax?
title_sort astyanax hastatus myers, 1928 (teleostei, characidae): a new species complex within the genus astyanax?
topic Animal Genetics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3036056/
https://www.ncbi.nlm.nih.gov/pubmed/21637509
http://dx.doi.org/10.1590/S1415-47572009005000055
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