Chromosome evolution in the erythrinid fish, Erythrinus erythrinus (Teleostei : Characiformes)

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dc.contributor.authorBertollo, LAC
dc.contributor.authorOliveira, C.
dc.contributor.authorMolina, W. F.
dc.contributor.authorMargarido, V. P.
dc.contributor.authorFontes, M. S.
dc.contributor.authorPastori, M. C.
dc.contributor.authorFalcao, J. D.
dc.contributor.authorFenocchio, A. S.
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)
dc.contributor.institutionUniv Estadual Oeste Parana
dc.contributor.institutionUniv Nacl Misiones
dc.contributor.institutionUniversidade Federal do Amazonas (UFAM)
dc.date.accessioned2014-05-20T15:28:27Z
dc.date.available2014-05-20T15:28:27Z
dc.date.issued2004-08-01
dc.description.abstractThe genus Erythrinus belongs to the family Erythrinidae, a neotropical fish group. This genus contains only two described species, Erythrinus erythrinus being the most widely distributed in South America. Six samples of this species from five distinct Brazilian localities and one from Argentina were studied cytogenetically. Four groups were identified on the basis of their chromosomal features. Group A comprises three samples, all with 2n = 54 chromosomes, a very similar karyotypic structure, and the absence of chromosome differentiation between males and females. One sample bears up to four supernumerary microchromosomes, which look like 'double minute chromosomes' in appearance. Groups B - D comprise the three remaining samples, all sharing an X1X1X2X2/X1X2Y sex chromosome system. Group B shows 2n = 54/53 chromosomes in females and males, respectively, and also shows up to three supernumerary microchromosomes. Groups C and D show 2n = 52/51 chromosomes in females and males, respectively, but differ in the number of metacentric, subtelocentric, and acrocentric chromosomes. In these three groups ( B - D), the Y is a metacentric chromosome clearly identified as the largest in the complement. The present results offer clear evidence that local samples of E. erythrinus retain exclusive and fixed chromosomal features, indicating that this species may represent a species complex.en
dc.description.affiliationUniv Fed Sao Carlos, Dept Genet & Evolucao, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, São Paulo, Brazil
dc.description.affiliationUniv Fed Rio Grande Norte, Dept Ciências Biol, Natal, RN, Brazil
dc.description.affiliationUniv Estadual Oeste Parana, Toledo, PR, Brazil
dc.description.affiliationUniv Nacl Misiones, Dept Genet, Posadas, Argentina
dc.description.affiliationUniv Fed Amazonas, Dept Biol, Manaus, Amazonas, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, São Paulo, Brazil
dc.format.extent228-233
dc.identifierhttp://dx.doi.org/10.1038/sj.hdy.6800511
dc.identifier.citationHeredity. London: Nature Publishing Group, v. 93, n. 2, p. 228-233, 2004.
dc.identifier.doi10.1038/sj.hdy.6800511
dc.identifier.issn0018-067X
dc.identifier.urihttp://hdl.handle.net/11449/38259
dc.identifier.wosWOS:000222851600018
dc.language.isoeng
dc.publisherNature Publishing Group
dc.relation.ispartofHeredity
dc.relation.ispartofjcr3.872
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectErythrinus fishpt
dc.subjectchromosomal diversitypt
dc.subjectsex chromosomespt
dc.titleChromosome evolution in the erythrinid fish, Erythrinus erythrinus (Teleostei : Characiformes)en
dc.typeArtigo
dcterms.licensehttp://www.nature.com/authors/policies/confidentiality.html
dcterms.rightsHolderNature Publishing Group

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