New occurrence of a macro B-chromosome in Astyanax scabripinnis paranae (Pisces, Characiformes, Characidae)

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dc.contributor.authorMaistro, E. L. [UNESP]
dc.contributor.authorForesti, F. [UNESP]
dc.contributor.authorOliveira, C. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:17:55Z
dc.date.available2014-05-27T11:17:55Z
dc.date.issued1994-01-01
dc.description.abstractCytogenetic studies performed on 17 specimens (11 females and six males) of Astyanax scabripinnis paranae from the Cascatinha stream showed that this population has 2n = 50 chromosomes (8M + 22SM + 10ST + 10A), two chromosome pairs with NORs and conspicuous C-band positive blocks in the terminal position of the long arm of five chromosome pairs. Three females presented 2n = 51 chromosomes and the extra chromosome was a large metacentric similar in size and morphology to the first chromosome pair in the karyotype. This accessory chromosome was entirely heterochromatic in C-banded metaphases, which permitted its classification as a supernumerary chromosome. Some aspects related to the morphology of such macro B-chromosomes are discussed.en
dc.description.affiliationDepartamento de Morfologia Instituto de Biociencias UNESP, 18618-000 Botucatu, SP
dc.description.affiliationUnespDepartamento de Morfologia Instituto de Biociencias UNESP, 18618-000 Botucatu, SP
dc.format.extent153-156
dc.identifierhttp://www.gmb.org.br/Revistas/V17/v17a25.pdf
dc.identifier.citationBrazilian Journal of Genetics, v. 17, n. 2, p. 153-156, 1994.
dc.identifier.file2-s2.0-0028024862.pdf
dc.identifier.issn0100-8455
dc.identifier.lattes0804793944846367
dc.identifier.scopus2-s2.0-0028024862
dc.identifier.urihttp://hdl.handle.net/11449/64449
dc.language.isoeng
dc.relation.ispartofBrazilian Journal of Genetics
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectanimal cell
dc.subjectchromosome analysis
dc.subjectfemale
dc.subjectfish
dc.subjectkaryotype
dc.subjectmale
dc.subjectnonhuman
dc.subjectsupernumerary chromosome
dc.titleNew occurrence of a macro B-chromosome in Astyanax scabripinnis paranae (Pisces, Characiformes, Characidae)en
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/bjg/paboutj.htm
dcterms.licensehttp://www.gmb.org.br/copyright.html
unesp.author.lattes0804793944846367
unesp.author.orcid0000-0003-0757-7876[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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