Karyotypic conservatism in five species of Prochilodus (Characiformes, Prochilodontidae) disclosed by cytogenetic markers
The family Prochilodontidae is considered a group with well conserved chromosomes characterized by their number, morphology and banding patterns. Thence, our study aimed at accomplishing a cytogenetic analysis with conventional methods (Giemsa staining, silver staining of the nucleolus organizer reg...
| Autores: | , , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2013 |
| País: | Brasil |
| Recursos: | Universidade Estadual Paulista (UNESP) |
| Repositório: | Repositório Institucional da UNESP |
| Idioma: | inglês |
| OAI Identifier: | oai:repositorio.unesp.br:11449/76527 |
| Acesso em linha: | http://dx.doi.org/10.1590/S1415-47572013000300008 http://hdl.handle.net/11449/76527 |
| Access Level: | Acceso aberto |
| Palavra-chave: | AgNOR C-banding Conserved karyotype FISH Hydrographic basins DNA 18S DNA 5S C banding Characiformes chromosome marker chromosome NOR chromosome number chromosome structure cytogenetics DNA probe fluorescence in situ hybridization genetic conservation Giemsa stain heterochromatin hydrography karyotype nonhuman Prochilodus Prochilodus argenteus Prochilodus brevis Prochilodus costatus Prochilodus lineatus Prochilodus nigricans river basin silver staining |
| Resumo: | The family Prochilodontidae is considered a group with well conserved chromosomes characterized by their number, morphology and banding patterns. Thence, our study aimed at accomplishing a cytogenetic analysis with conventional methods (Giemsa staining, silver staining of the nucleolus organizer regions-AgNOR, and C-banding) and fluorescence in situ hybridization (FISH) with 18S and 5S ribosomal DNA probes in five species of the Prochilodus genus (Prochilodus argenteus, Prochilodus brevis, Prochilodus costatus, Prochilodus lineatus and Prochilodus nigricans) collected from different Brazilian hydrographic basins. The results revealed conservatism in chromosome number, morphology, AgNORs 18S and 5S rDNAs location and constitutive heterochromatin distribution patterns. The minor differences observed in this work, such as an Ag-NOR on a P. argenteus chromosome and a distinct C-banding pattern in P. lineatus, are not sufficient to question the conservatism described for this group. Future work using repetitive DNA sequences as probes for FISH will be interesting to further test the cytogenetic conservatism in Prochilodus. © 2013, Sociedade Brasileira de Genética. |
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