Cytogenetic analysis of B chromosomes in one population of the fish Moenkhausia sanctaefilomenae (Steindachner, 1907) (Teleostei, Characiformes)

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorHashimoto, Diogo Teruo
dc.creatorVoltolin, Tatiana Aparecida
dc.creatorValim de Arruda Paes, Ana Danyelle Noitel
dc.creatorForesti, Fausto
dc.creatorBortolozzi, Jehud
dc.creatorPorto-Foresti, Fábio
dc.date2014-05-20T13:52:35Z
dc.date2014-05-20T13:52:35Z
dc.date2012-01-01
dc.date.accessioned2017-04-05T21:07:09Z
dc.date.available2017-04-05T21:07:09Z
dc.identifierComparative Cytogenetics. St Petersburg: Zoological Inst, v. 6, n. 2, p. 141-151, 2012.
dc.identifier1993-0771
dc.identifierhttp://hdl.handle.net/11449/18767
dc.identifier10.3897/CompCytogen.v6i2.1769
dc.identifierWOS:000307194600004
dc.identifierWOS000307194600004.pdf
dc.identifierhttp://dx.doi.org/10.3897/CompCytogen.v6i2.1769
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/864833
dc.descriptionThe aim of this study was to characterize cytogenetically one population of the fish Moenkhausia sanctaefilomenae (Steindachner, 1907), with emphasis on the analysis of B chromosomes. The nucleolar activity in the B microchromosomes was characterized, and an analysis of mitotic instability of these microchromosomes was accomplished. The results showed a diploid chromosome number of 50 chromosomes. In all individuals, we observed the presence of B microchromosomes with intra- and inter-individual variability. The analysis of the nucleolus organizing regions (NORs) by silver nitrate staining demonstrated multiple NORs. We observed active sites of ribosomal DNA in the B microchromosomes, with a frequency of 20% in the analyzed cells, which shows gene activity in these chromosomal elements. The analysis of constitutive heterochromatin patterns showed that the B microchromosomes are heterochromatic or euchromatic, which demonstrates differentiation of DNA composition between these genomic elements. The calculation of the mitotic instability index implied that B chromosomes in this species might be in a final stage of instability.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherZoological Inst
dc.relationComparative Cytogenetics
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectfish cytogenetic
dc.subjectNOR expression
dc.subjectsupernumerary chromosomes
dc.subjectmitotic instability
dc.titleCytogenetic analysis of B chromosomes in one population of the fish Moenkhausia sanctaefilomenae (Steindachner, 1907) (Teleostei, Characiformes)
dc.typeOtro


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