Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon
Cytogenetic characterization of two freshwater sciaenid species from the genus Plagioscion (P. squamosissimus and Plagioscion sp.) was obtained for the first time. Giemsa staining, Ag-NOR and C-banding revealed that both species presented 2n = 48 chromosomes (almost all acrocentric). Single NORs and...
| Autor principal: | Feldberg, Eliana |
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| Outros Autores: | Porto, Jorge Ivan Rebelo, dos Santos, Elen Bethlen Pedraça, Valentim, Francisco Carlos Souza |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Genetics and Molecular Biology
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/14972 |
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oai:repositorio:1-14972 |
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oai:repositorio:1-14972 Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon Feldberg, Eliana Porto, Jorge Ivan Rebelo dos Santos, Elen Bethlen Pedraça Valentim, Francisco Carlos Souza Fresh Water Animals Cell Centromere Chromosome C Band Chromosome Nor Cytogenetics Female Fish Giemsa Stain Heterochromatin Male Nonhuman Silver Staining Animalsia Perciformes Plagioscion Plagioscion Plagioscion Squamosissimus Plagioscion Squamosissimus Sciaenidae Cytogenetic characterization of two freshwater sciaenid species from the genus Plagioscion (P. squamosissimus and Plagioscion sp.) was obtained for the first time. Giemsa staining, Ag-NOR and C-banding revealed that both species presented 2n = 48 chromosomes (almost all acrocentric). Single NORs and heterochromatin were found mainly at the pericentromeric position. Karyotypic formulae and NOR location proved to be valuable in showing both interspecific and intraspecific differences. All chromosomes were acrocentric in P. squamosissimus. NORs were located at proximal positions on the long arms of the last chromosome pair of the complement, and were heteromorphic due to size differences. Such heteromorphic NORs seem to be associated with each population sampled. Plagioscion sp. presented two cytotypes: cytotype a (2M + 46A) and cytotype b (48A). In both cytotypes, NOR-bearing chromosomes were located at the proximal position on the long arms of the first chromosome pair of the complement. However, NOR-bearing chromosomes were metacentric in cytotype a and acrocentric in cytotype b. 2020-05-07T13:59:14Z 2020-05-07T13:59:14Z 1999 Artigo https://repositorio.inpa.gov.br/handle/1/14972 10.1590/S1415-47571999000300011 en Volume 22, Número 3, Pags. 351-356 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Genetics and Molecular Biology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Fresh Water Animals Cell Centromere Chromosome C Band Chromosome Nor Cytogenetics Female Fish Giemsa Stain Heterochromatin Male Nonhuman Silver Staining Animalsia Perciformes Plagioscion Plagioscion Plagioscion Squamosissimus Plagioscion Squamosissimus Sciaenidae |
| spellingShingle |
Fresh Water Animals Cell Centromere Chromosome C Band Chromosome Nor Cytogenetics Female Fish Giemsa Stain Heterochromatin Male Nonhuman Silver Staining Animalsia Perciformes Plagioscion Plagioscion Plagioscion Squamosissimus Plagioscion Squamosissimus Sciaenidae Feldberg, Eliana Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon |
| topic_facet |
Fresh Water Animals Cell Centromere Chromosome C Band Chromosome Nor Cytogenetics Female Fish Giemsa Stain Heterochromatin Male Nonhuman Silver Staining Animalsia Perciformes Plagioscion Plagioscion Plagioscion Squamosissimus Plagioscion Squamosissimus Sciaenidae |
| description |
Cytogenetic characterization of two freshwater sciaenid species from the genus Plagioscion (P. squamosissimus and Plagioscion sp.) was obtained for the first time. Giemsa staining, Ag-NOR and C-banding revealed that both species presented 2n = 48 chromosomes (almost all acrocentric). Single NORs and heterochromatin were found mainly at the pericentromeric position. Karyotypic formulae and NOR location proved to be valuable in showing both interspecific and intraspecific differences. All chromosomes were acrocentric in P. squamosissimus. NORs were located at proximal positions on the long arms of the last chromosome pair of the complement, and were heteromorphic due to size differences. Such heteromorphic NORs seem to be associated with each population sampled. Plagioscion sp. presented two cytotypes: cytotype a (2M + 46A) and cytotype b (48A). In both cytotypes, NOR-bearing chromosomes were located at the proximal position on the long arms of the first chromosome pair of the complement. However, NOR-bearing chromosomes were metacentric in cytotype a and acrocentric in cytotype b. |
| format |
Artigo |
| author |
Feldberg, Eliana |
| author2 |
Porto, Jorge Ivan Rebelo dos Santos, Elen Bethlen Pedraça Valentim, Francisco Carlos Souza |
| author2Str |
Porto, Jorge Ivan Rebelo dos Santos, Elen Bethlen Pedraça Valentim, Francisco Carlos Souza |
| title |
Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon |
| title_short |
Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon |
| title_full |
Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon |
| title_fullStr |
Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon |
| title_full_unstemmed |
Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (perciformes, sciaenidae) from the Central Amazon |
| title_sort |
cytogenetic studies of two freshwater sciaenids of the genus plagioscion (perciformes, sciaenidae) from the central amazon |
| publisher |
Genetics and Molecular Biology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/14972 |
| _version_ |
1787143911520600064 |
| score |
11.755432 |