Data/hora: 06/06/2024 00:45:13

Provedor de dados: | 52
País: | Brazil
Título: | Interindividual size heteromorphism of NOR and chromosomal location of 5S rRNA genes in Iheringichthys labrosus
Autores: | Carvalho,Rafael Augusto de; Dias,Ana Lúcia.
Data: | 2007-01-01
Ano: | 2007
Palavras-chave: | Fish chromosome; AgNOR; In situ hibridization; Chromomycin A3; Heteromorphism.
Resumo: | 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
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100017
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132007000100017
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.50 n.1 2007
Fonte: | info:eu-repo/semantics/openAccess