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	Provedor de dados Genet. Mol. Biol. (1) Neotropical Ichthyology (1) Autor Bertollo,Luiz Antonio Carlos (1) Diniz,Débora (1) Feldberg,Eliana (1) Ferreira,Milena (1) Laudicina,Alejandro (1) Marajó,Leandro (1) Py-Daniel,Lúcia H. Rapp (1) Viana,Patrik F. (1) Mais... Palavra-chave Chromosomal markers (2) Amazon region (1) Fish cytogenetics (1) Karyotypic characterization (1) NOR (1) Ribosomal DNA (1) Ribosomal genes (1) Twig catfish (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2018 (1) 2009 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Chromosomal location of 18S and 5S rDNA sites in Triportheus fish species (Characiformes, Characidae) Genet. Mol. Biol. Diniz,Débora; Laudicina,Alejandro; Bertollo,Luiz Antonio Carlos. The location of 18S and 5S rDNA sites was determined in eight species and populations of the fish genus Triportheus by using fluorescent in situ hybridization (FISH). The males and females of all species had 2n = 52 chromosomes and a ZZ/ZW sex chromosome system. A single 18S rDNA site that was roughly equivalent to an Ag-NOR was detected on the short arms of a submetacentric pair in nearly all species, and up to two additional sites were also observed in some species. In addition, another 18S rDNA cluster was identified in a distal region on the long arms of the W chromosome; this finding corroborated previous evidence that this cluster would be a shared feature amongst Triportheus species. In T. angulatus, a heterozygotic paracentric inversion involving... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosomal markers; Fish cytogenetics; NOR; Ribosomal genes. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100006 Cytogenetics of two Farlowella species (Loricariidae: Loricariinae): implications on the taxonomic status of the species Neotropical Ichthyology Marajó,Leandro; Viana,Patrik F.; Ferreira,Milena; Py-Daniel,Lúcia H. Rapp; Feldberg,Eliana. ABSTRACT Farlowella is one of the most diverse genera of the Loricariinae, restricted to South America rivers. The taxonomic and phylogenetic relationships among its species are contentious and, while genetic studies would contribute to the understanding of their relationships, the only available datum refer to the karyotype description of only one species. In the present study two Amazonian species, Farlowella cf. amazonum and F. schreitmuelleri, were analyzed using conventional and molecular cytogenetic procedures. Both species had diploid chromosome number 58, but different fundamental numbers (NF) 116 and 112, respectively, indicative of chromosomal rearrangements. C-banding is almost poor, especially in F. cf. amazonum, and occurs predominantly in the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon region; Chromosomal markers; Karyotypic characterization; Ribosomal DNA; Twig catfish. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400213 Registros recuperados: 2 Primeira ... 1 ... Última

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