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	Provedor de dados BJB (1) Genet. Mol. Biol. (1) Neotropical Ichthyology (1) Autor COSTA,C. T. A. (1) Feldberg,Eliana (1) Gross,Maria Claudia (1) Hashimoto,Diogo Teruo (1) KUHN,G. C. S. (1) Porto,Jorge Ivan Rebelo (1) Porto-Foresti,Fábio (1) SENE,F. M. (1) Schneider,Carlos Henrique (1) Silva,Adailton Moreira da (1) Terencio,Maria Leandra (1) Mais... Palavra-chave Karyotype differentiation (3) Fish cytogenetics (2) Chromosomal rearrangements (1) Courtship song (1) Cytotaxonomy (1) Drosophila meridionalis (1) Heteromorphic sex chromosome system (1) NOR phenotypes (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2010 (1) 2008 (1) 2000 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Comparative cytogenetics of Carnegiella marthae and Carnegiella strigata (Characiformes, Gasteropelecidae) and description of a ZZ/ZW sex chromosome system Genet. Mol. Biol. Terencio,Maria Leandra; Schneider,Carlos Henrique; Gross,Maria Claudia; Silva,Adailton Moreira da; Feldberg,Eliana; Porto,Jorge Ivan Rebelo. Comparative cytogenetic analyses of hatchetfishes Carnegiella marthae and Carnegiella strigata (Gasteropelecidae) from the Rio Negro basin were performed using conventional Giemsa staining, silver (Ag) -staining and C-banding. The diploid chromosome numbers of both species equaled 2n = 50 but their karyotypes were distinct. We found evidence for sex chromosomes in C. marthae since karyotype of males presented 20 M + 12 SM + 4 ST + 14 A and ZZ ST chromosomes while the females presented 20 M + 12 SM + 4 ST + 14 A and ZW ST chromosomes of distinct size. Conversely, C. strigata presented 4 M + 4 SM + 2 ST + 40 A chromosomes without sex chromosome heteromorphism. Karyotypes of both species had two NOR-bearing SM chromosomes of distinct size indicating the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish cytogenetics; Karyotype differentiation; NOR phenotypes; Heteromorphic sex chromosome system; Cytotaxonomy. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200011 Chromosome polymorphism of heterochromatin and nucleolar regions in two populations of the fish Astyanax bockmanni (Teleostei: Characiformes) Neotropical Ichthyology Hashimoto,Diogo Teruo; Porto-Foresti,Fábio. Karyotype and other chromosomal markers as revealed by C-banding and silver (Ag) impregnation in two Astyanax bockmanni populations (Barra Seca Stream and Campo Novo River) were examined. The diploid chromosome number 2n = 50 and nearly identical karyotypes were documented. C-banding revealed heterochromatic blocks on the terminal regions of some chromosomes, with high frequencies of polymorphisms. The Ag-impregnation showed that the nucleolus organizer regions (NORs) varied in number, location and organization. Astyanax bockmanni revealed chromosome characteristics similar those of the species complex "A. scabripinnis". Mechanisms that may be responsible for the high degree of polymorphism are discussed. Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish cytogenetics; Chromosomal rearrangements; Karyotype differentiation. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400016 Low courtship song variation in South and Southeastern Brazilian populations of Drosophila meridionalis (Diptera, Drosophilidae) BJB COSTA,C. T. A.; KUHN,G. C. S.; SENE,F. M.. Drosophila meridionalis is a cactus-breeding species with a wide distribution in South America. Most populations of this species are geographically isolated, what provides a promising scenario for studying evolution. Former studies of this species revealed a remarkable karyotypic variation among its populations. Up to six distinct metaphase chromosomes were described, showing that this species is polymorphic at least at the chromosomal level. In order to elucidate the taxonomic status of populations showing different metaphase chromosomes, we analyzed the courtship song of five populations of D. meridionalis in South and Southeastern Brazil. In addition, we analyzed the metaphase chromossomes of each population. Our results show that, despite the two... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila meridionalis; Courtship song; Karyotype differentiation. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100008 Registros recuperados: 3 Primeira ... 1 ... Última

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