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	Provedor de dados Genet. Mol. Biol. (3) Autor Wasko,Adriane Pinto (3) Foresti,Fausto (2) Martins,Cesar (2) Oliveira,Claudio (2) Galetti Jr.,Pedro Manoel (1) Santos,Lessandra Viviane De Rosa (1) Santos,Lessandra Viviane de Rosa (1) Mais... Palavra-chave 5S rDNA (1) B chromosomes (1) C-banding (1) Chromosomes (1) Curimatidae (1) Cyphocharax modesta (1) Cyphocharax modestus (1) FISH (1) Nucleotide sequence (1) Steindachnerina insculpta (1) Supernumerary chromosomes (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2008 (1) 2006 (1) 2000 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Nucleotide sequence, genomic organization and chromosome localization of 5S rDNA in two species of Curimatidae (Teleostei, Characiformes) Genet. Mol. Biol. Santos,Lessandra Viviane de Rosa; Foresti,Fausto; Wasko,Adriane Pinto; Oliveira,Claudio; Martins,Cesar. The 5S ribosomal DNA (5S rDNA) of higher eukaryotes is organized in repeat units of tandem arrays composed of a 5S rDNA coding region, conserved even among non-related taxa, and a variable non-transcribed spacer sequence (NTS). To contribute to knowledge on the organization and evolution of vertebrate 5S rDNA we used PCR, nucleotide sequencing, Southern blot hybridization and chromosome fluorescence in situ hybridization (FISH) to investigate 5S rDNA tandem repeats in the South American Curimatidae fish Steindachnerina insculpta and Cyphocharax modesta. 5S rDNA repeats of 180 base pairs (bp) from both species were PCR-generated and sequenced evidencing the shortest 5S rDNA monomer so far described in eukaryote species. Southern blotting revealed that both... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cyphocharax modesta; Steindachnerina insculpta; 5S rDNA; Chromosomes; FISH; Nucleotide sequence. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200009 Mapping 18S ribosomal genes in fish of the genus Brycon (Characidae) by fluorescence in situ hybridization (FISH) Genet. Mol. Biol. Wasko,Adriane Pinto; Galetti Jr.,Pedro Manoel. The present study provides data on the nucleolar organizer regions (NORs) of seven Brycon species based on mapping of the 18S rRNA genes by fluorescence in situ hybridization (FISH). Fluorescent signals were observed on the telomere of the long arm of two large submetacentric chromosomes, thus confirming the number and location of NORs previously revealed by other classical cytogenetic techniques. Although there were no inter- or intra-individual variations in the number and location of the 18S loci, NOR size polymorphism was observed between homologous chromosomes. The clustering and conservation of NORs in a single chromosome pair indicates a high level of NOR stability among species of the genus Brycon. Tipo: Info:eu-repo/semantics/article Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100025 Identification and description of distinct B chromosomes in Cyphocharax modestus (Characiformes, Curimatidae) Genet. Mol. Biol. Santos,Lessandra Viviane De Rosa; Foresti,Fausto; Martins,Cesar; Oliveira,Claudio; Wasko,Adriane Pinto. Cytogenetic analyses were performed in Cyphocharax modestus, collected at Paranapanema River and Tietê River (São Paulo State, Brazil). A karyotype with 2n = 54 chromosomes was observed in the animals from both Brazilian freshwater river systems. One to four B chromosomes were also detected in individuals from the Paranapanema River, which represents the probable first report of more than a single supernumerary element in a species of the Curimatidae group. C-banding revealed centromeric and telomeric heterochromatin blocks in several chromosomes of the normal karyotype complement of C. modestus. Moreover, while some B chromosomes were characterized by the complete absence of C-bands, others were totally heterochromatic. Although there was a prevalence of... Tipo: Info:eu-repo/semantics/article Palavras-chave: B chromosomes; C-banding; Curimatidae; Cyphocharax modestus; Supernumerary chromosomes. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200019 Registros recuperados: 3 Primeira ... 1 ... Última

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