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	Provedor de dados 83 (3) Autor Margarido,Vladimir P. (3) Pavanelli,Carla S. (2) Baumgärtner,Lucas (1) Girardi,Simone C. (1) Graça,Weferson J. da (1) Oliveira,Renata C. C. (1) Paiz,Leonardo M. (1) Venere,Paulo C. (1) Vitorino,Carla A. (1) Mais... Palavra-chave 18S rDNA (1) 5S rDNA (1) B chromosome (1) Bottleneck (1) Calophysus-Pimelodus clade (1) Chromosomes (1) Citotaxonomy (1) Conservation (1) Endogamy (1) F ST (1) Iguaçu River (1) Karyotype (1) Paraná River (1) Pirarucu (1) Population genetics (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2018 (1) 2017 (1) 2015 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Contributions to the systematic of Pimelodidae (Osteichthyes, Siluriformes): basic and molecular cytogenetics on seven species of Pimelodus from three Brazilian hydrographic systems 83 Girardi,Simone C.; Pavanelli,Carla S.; Margarido,Vladimir P.. ABSTRACT Pimelodidae harbors several species and is widely distributed throughout the Neotropical region. Pimelodus is the genus with the largest number of species, however it is a polyphyletic group. Cytogenetic analyzes of the valid species still covers less than half of them. Herein, seven Pimelodus species from three Brazilian hydrographic systems were analyzed through basic (Giemsa, AgNORs and C banding) and molecular (5S and 18S rDNA-FISH) cytogenetic methods. All species had 2n=56 chromosomes with different karyotype formulas observed among the species. AgNORs were corresponding to 18S rDNA and localized on long arm of one chromosome pair in all species. Heterochromatin distribution follows the pattern commonly verified in the family and allows to... Tipo: Info:eu-repo/semantics/article Palavras-chave: 5S rDNA; 18S rDNA; B chromosome; Calophysus-Pimelodus clade; Citotaxonomy. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200209 Cytogenetics of Gymnogeophagus setequedas (Cichlidae: Geophaginae), with comments on its geographical distribution 83 Paiz,Leonardo M.; Baumgärtner,Lucas; Graça,Weferson J. da; Margarido,Vladimir P.; Pavanelli,Carla S.. ABSTRACT We provide cytogenetic data for the threatened species Gymnogeophagus setequedas, and the first record of that species collected in the Iguaçu River, within the Iguaçu National Park’s area of environmental preservation, which is an unexpected occurrence for that species. We verified a diploid number of 2n = 48 chromosomes (4sm + 24st + 20a) and the presence of heterochromatin in centromeric and pericentromeric regions, which are conserved characters in the Geophagini. The multiple nucleolar organizer regions observed in G. setequedas are considered to be apomorphic characters in the Geophagini, whereas the simple 5S rDNA cistrons located interstitially on the long arm of subtelocentric chromosomes represent a plesiomorphic character. Because G.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosomes; Conservation; Iguaçu River; Karyotype; Paraná River. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200211 Genetic diversity of Arapaima gigas (Schinz, 1822) (Osteoglossiformes: Arapaimidae) in the Araguaia-Tocantins basin estimated by ISSR marker 83 Vitorino,Carla A.; Oliveira,Renata C. C.; Margarido,Vladimir P.; Venere,Paulo C.. The genetic diversity of the specimens of four natural populations of Arapaima from Araguaia-Tocantins basin was assessed within and among these stocks, using five primers for ISSR. COI (cytochrome c oxidase subunit I ) partial sequences confirmed that the specimens belongs to Arapaima gigas . The ISSR provided 168 loci, of which 165 were polymorphic. However, the number of loci for each population and expected heterozygosity values were low. AMOVA showed 52.63% intra-population variation and 47.37% inter-population variation. The F ST was high among all populations (F ST ≥ 0.25), however, the cluster analysis (PCoA) and Bayesian inference showed three major groups: Araguaiana-MT + São Félix do Araguaia-MT, Novo Santo Antônio-MT and Itupiranga-PA. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bottleneck; Endogamy; F ST; Pirarucu; Population genetics. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300557 Registros recuperados: 3 Primeira ... 1 ... Última

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