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	Provedor de dados BABT (1) Neotropical Ichthyology (1) Autor Carvalho,Rafael Augusto de (2) Dias,Ana Lúcia (2) Fenocchio,Alberto Sergio (1) Martins-Santos,Isabel C. (1) Sanchez,Sebástian (1) Swarça,Ana Claudia (1) Mais... Palavra-chave AgNOR (1) C-banding (1) CMA3 (1) Chromomycin A3 (1) Cytogenetics (1) FISH (1) Fish chromosome (1) Heteromorphism (1) In situ hibridization (1) NORs (1) Pimelodidae (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Chromosomal analyses in Megalonema platanum (Siluriformes: Pimelodidae), an endangered species from South American rivers Neotropical Ichthyology Carvalho,Rafael Augusto de; Sanchez,Sebástian; Swarça,Ana Claudia; Fenocchio,Alberto Sergio; Martins-Santos,Isabel C.; Dias,Ana Lúcia. This study presents chromosomal data of Megalonema platanum from rio Tibagi, Paraná, Brazil and from rio Paraná, Argentina. The diploid number was equal 54 with karyotype composition of 24m+16sm+2st+12a in both populations. The AgNOR sites were detected in the terminal position of a submetacentric pair of the two analyzed populations, coinciding with secondary constrictions on the short arm of pair 15. CMA3 and FISH with 18S rDNA probe displayed fluorescent signals that correspond to the AgNOR sites and secondary constriction. The presence of a small acrocentric supernumerary chromosome can be observed in M. platanum from rio Tibagi, with centromeric heterochromatin. Others heterochromatic blocks were evidenced in the terminal position of some chromosome... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cytogenetics; C-banding; CMA3; FISH; NORs; Pimelodidae. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100017 Interindividual size heteromorphism of NOR and chromosomal location of 5S rRNA genes in Iheringichthys labrosus BABT Carvalho,Rafael Augusto de; Dias,Ana Lúcia. Twenty-five specimens of Iheringichthys labrosus from the Capivara Reservoir were analysed cytogenetically. AgNORs were detected in a pair of ST chromosomes, in the telomeric region of the long arm. Some individuals showed size heteromorphism of this region between homologous chromosomes. Treatment with CMA3 displayed GC-rich regions corresponding to the AgNOR pair, plus other fluorescent staining. In situ hybridization by fluorescence (FISH) with the 18S rDNA probe showed only one pair of stained chromosomes, confirming the heteromorphism observed with AgNO3 and CMA3 in some individuals. The 5S rDNA probe revealed telomeric staining on the long arm of a pair of chromosomes of the ST-A group, probably different from the NOR pair. Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish chromosome; AgNOR; In situ hibridization; Chromomycin A3; Heteromorphism. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100017 Registros recuperados: 2 Primeira ... 1 ... Última

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