Supernumerary chromosomes, Robertsonian rearrangement and multiple NORs in Corydoras aeneus (Pisces, Siluriformes, Callichthyidae)

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dc.contributor.authorOliveira, C.
dc.contributor.authorToledo, L. F. Almeida
dc.contributor.authorForesti, F. [UNESP]
dc.contributor.authorToledo, S. A.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T19:56:13Z
dc.date.available2022-04-28T19:56:13Z
dc.date.issued1988-01-01
dc.description.abstractCytogenetic studies in four samples of Corydoras aetteus from tributaries of the Tietê River in the upper Paraná System, Brazil (rivers Araquá, Corumbataí, Capivara and Alambari) evidenced a diploid number of 2n = 60 and 2n = 61 plus a variable number of 0 to 3 small supernumeraries or B chromosomes. The variability in the A complement was due to the occurrence of a Robertsonian rearrangement. The supernumerary chromosomes were almost totally C-band positive. The analysis of male meiotic cells showed the occurrence of 29 bivalents and one trivalent in the individuals heterozygous for the Robertsonian rearrangement and of univalents in the individuals with supernumerary chromosomes. Four chromosome pairs are involved in nucleolar organization. All the 4 samples presented supernumerary chromosomes, but the Robertsonian rearrangement was restricted to the rivers Araqua and Corumbataí. © 1988 by the Japan Society for Bioscience, Biotechnology, and Agrochemistry.en
dc.description.affiliationDepartamento de Biologia Instituto de Biociências da Universidade de São Paulo, São Paulo
dc.description.affiliationDepartamento de Morfologia Instituto Básico de Biologia Médica e Agrícola Universidade Estadual Paulista ªJulio de Mesquita Filho», Botucatu
dc.description.affiliationUnespDepartamento de Morfologia Instituto Básico de Biologia Médica e Agrícola Universidade Estadual Paulista ªJulio de Mesquita Filho», Botucatu
dc.format.extent227-236
dc.identifierhttp://dx.doi.org/10.1080/00087114.1988.10797863
dc.identifier.citationCaryologia, v. 41, n. 3-4, p. 227-236, 1988.
dc.identifier.doi10.1080/00087114.1988.10797863
dc.identifier.issn2165-5391
dc.identifier.issn0008-7114
dc.identifier.scopus2-s2.0-0345095109
dc.identifier.urihttp://hdl.handle.net/11449/224399
dc.language.isoeng
dc.relation.ispartofCaryologia
dc.sourceScopus
dc.titleSupernumerary chromosomes, Robertsonian rearrangement and multiple NORs in Corydoras aeneus (Pisces, Siluriformes, Callichthyidae)en
dc.typeArtigo

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