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dc.contributor.authorA C P Souza
dc.contributor.authorAline L Nascimento
dc.contributor.authorCastro R R
dc.contributor.authorRegina maria de Souza Barros
dc.contributor.authorCleusa C Y Nagamachi
dc.contributor.authorJúlio César Pieczarka
dc.contributor.authorEliana Feldberg
dc.date.accessioned2016-02-23T20:26:44Z-
dc.date.available2016-02-23T20:26:44Z-
dc.date.issued2004
dc.identifier.issn0008-7114
dc.identifier.urihttp://repositorio.inpa.gov.br/handle/123/2598-
dc.description.abstractThree specimes of Baryancistrus aff. Niveatus were studied cytogenetically by conventional staining, C banding, Ag-NORs, CMA 3, DAPI and FISH with human telomeric probes. The results revealed a complement con-sisting of 52 metacentric, submetacentric and subtelocentric type chromosomes. C banding showed that heterochro-matin is located at pairs 1, 3, 6, 10, 11 and 22 in different positions. NORs were located at the short arm of pair 3, coinciding with a positive C-band. This region was also marked with CMA 3, which also marked heterochromatic blocks in chromosomes 11 and 22. These regions were negatively stained by DAPI. These results revealed the pres-ence of two different types of constitutive heterochromatin, probably due to their base composition. Chromosome bearing rDNA sites presented a difference in size in the NOR regions, probably due to heterochromatin and ribos-somal cistrons amplification. The localization of telomeric sequences by FISH revealed the conservative nature of this region.
dc.languagePortuguês
dc.rightsRestrito
dc.subjectAmazônia
dc.subjectSiluriformes
dc.subjectAncistrinae
dc.titleKaryotypic analysis of Baryancistrus aff. niveatus (Ancistrinae, Loricaryidae) by C-banding, Ag-NOR, CMA(3), DAPI anf FISH.
dc.typeArtigo
dc.description.localpubItália
dc.description.volume57
dc.publisher.periodicoCaryologia (Firenze)
Aparece nas coleções:Coordenação de Biodiversidade (CBIO)

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