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	Provedor de dados Genet. Mol. Biol. (2) Neotropical Ichthyology (1) Autor Almeida,Fernanda Simões de (1) Contel,Eucleia Primo Betioli (1) Dias,Ana Lúcia (1) Garcia,Caroline (1) Giuliano-Caetano,Lucia (1) Malabarba,Luiz R. (1) Moreira Filho,Orlando (1) Sodré,Leda Maria Koelblinger (1) Treco,Fernando Rodrigo (1) Mais... Palavra-chave Pimelodus (3) 18S rDNA (1) 5S rDNA (1) Conservation (1) Fluorochromes (1) Genetic variability (1) Heterochromatin (1) NOR (1) Paracentric inversion (1) Parapimelodus (1) Population structure (1) RAPD markers (1) Species marker (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2008 (2) 2003 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Population structure analysis of Pimelodus maculatus (Pisces, Siluriformes) from the Tietê and Paranapanema Rivers (Brazil) Genet. Mol. Biol. Almeida,Fernanda Simões de; Sodré,Leda Maria Koelblinger; Contel,Eucleia Primo Betioli. Pimelodus maculatus populations from the Tietê and Paranapanema rivers were sampled and had their genetic structure analyzed by using RAPD markers, with the aim of contributing to future conservation studies. The proportion of polymorphic loci was greater than 50% in the populations of both rivers. Genetic diversity data showed that, in spite of its nine hydroelectric plants, the Tietê river population was genetically homogeneous, whereas the Paranapanema river population was structured. This might be due to the presence of high waterfalls distributed all along its course. These data may serve as indicators for future conservation studies on the Tietê and Paranapanema rivers. Tipo: Info:eu-repo/semantics/article Palavras-chave: RAPD markers; Population structure; Conservation; Genetic variability; Pimelodus. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300014 Localization of ribosomal genes in three Pimelodus species (Siluriformes, Pimelodidae) of the São Francisco River: 5S genes as species markers and conservation of the 18S rDNA sites Genet. Mol. Biol. Garcia,Caroline; Moreira Filho,Orlando. Pimelodidae is one of the most representative of Neotropical catfish families. However, these fish are still poorly studied in terms of cytogenetics, especially regarding the application of more accurate techniques such as the chromosomal localization of ribosomal genes. In the present work, fluorescent in situ hybridization with 5S and 18S rDNA probes was employed for rDNA site mapping in Pimelodus sp., P. fur and P. maculatus from the São Francisco River in the Três Marias municipality - MG. The results from the application of the 18S probe confirmed the previous data obtained by silver nitrate staining, identifying a simple nucleolar organizing region system for these species. However, the labeling results from the 5S rDNA probe demonstrated a... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pimelodus; Paracentric inversion; 5S rDNA; 18S rDNA; Species marker. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200018 Cytogenetic study of two species of the family Pimelodidae (Siluriformes) collected in lago Guaíba, Rio Grande do Sul, Brazil Neotropical Ichthyology Treco,Fernando Rodrigo; Malabarba,Luiz R.; Giuliano-Caetano,Lucia; Dias,Ana Lúcia. A cytogenetic study was conducted on specimens of Parapimelodus nigribarbis and Pimelodus maculatus collected in the lago Guaíba drainage, Porto Alegre, Rio Grande do Sul, Brazil. The two species had a diploid number of 56 chromosomes, with P. nigribarbis showing a karyotype of 20m + 20sm + 4st + 12a with FN of 100, and P. maculatus showing a karyotype of 24m + 20sm + 6st + 6a with FN of 106. NORs were demonstrated in both species in only one pair of subtelocentric chromosomes, in the terminal region of the long arm, which was coincident with C- banding and CMA3 staining, while DAPI staining was negative in these regions. Parapimelodus nigribarbis had a greater number of heterochromatic bands than did P. maculatus, which were distributed mainly in the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Parapimelodus; Pimelodus; NOR; Heterochromatin; Fluorochromes. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000100010 Registros recuperados: 3 Primeira ... 1 ... Última

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