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	Provedor de dados Genet. Mol. Biol. (1) Neotropical Ichthyology (1) Autor Feldberg,Eliana (2) Nakayama,Celeste Mutuko (2) Bertollo,Luiz Antonio Carlos (1) Porto,Jorge Ivan Rebelo (1) Teixeira,Aylton Saturnino (1) Palavra-chave Brazilian Amazon basin (1) Chromosomal evolution (1) Esterase enzymes (1) Fish (1) Heterochromatin (1) Karyotype (1) Piranhas (1) Ribosomal genes (1) Serrasalmus rhombeus species complex (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2012 (1) 2006 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Esterase-D and chromosome patterns in Central Amazon piranha (Serrasalmus rhombeus Linnaeus, 1766) from Lake Catalão Genet. Mol. Biol. Teixeira,Aylton Saturnino; Nakayama,Celeste Mutuko; Porto,Jorge Ivan Rebelo; Feldberg,Eliana. This study presents additional genetic data on piranha (Serrasalmus rhombeus Linnaeus, 1766) complex previously diagnosed due to the presence of distinct cytotypes 2n = 58 and 2n = 60. Three esterase-D enzyme loci (Est-D1, Est-D2 and Est-D3) were examined and complemented with chromosomal data from 66 piranha specimens collected from Lake Catalão. For all specimens the Est-D1 and Est-D2 loci were monomorphic. In contrast, the Est-D3 locus was polymorphic with genotypes and alleles being differentially distributed in the previously described cytotypes and served as the basis for detecting a new cytotype (2n = 60 B). In cytotype 2n = 58 the Est-D3 locus was also polymorphic and presented Mendelian allelic segregation with four genotypes (Est-D3(11),... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian Amazon basin; Esterase enzymes; Serrasalmus rhombeus species complex; Karyotype. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300018 Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin Neotropical Ichthyology Nakayama,Celeste Mutuko; Feldberg,Eliana; Bertollo,Luiz Antonio Carlos. Six species of Serrasalmidae from the central Amazon, representatives of the genera Serrasalmus (S. elongatus, S. maculatus, S. cf. rhombeus, and S. rhombeus), Pygocentrus (P. nattereri), and Colossoma (C. macropomum), were analyzed regarding the distribution of the Ag-NORs, C-positive heterochromatin and 18S and 5S rRNA genes on the chromosomes. All specimens had 2n = 60 chromosomes, except S. cf. rhombeus, with 2n = 58, and C. macropomum with 2n = 54 chromosomes. The Ag-NORs were multiple and located on the short arms of subtelo-acrocentric chromosomes in all Serrasalmus species and in P. nattereri, but were found on metacentric chromosomes in C. macropomum. The 18S rDNA sites were usually coincident with Ag-NORs, although some species had a higher... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosomal evolution; Fish; Heterochromatin; Piranhas; Ribosomal genes. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100005 Registros recuperados: 2 Primeira ... 1 ... Última

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