Molecular cytogenetic analyses reveal extensive chromosomal rearrangements and novel B chromosomes in Moenkhausia (Teleostei, characidae)

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dc.contributor.authorDo Nascimento, Cristiano Neves [UNESP]
dc.contributor.authorTroy, Waldo Pinheiro
dc.contributor.authorPansonato Alves, José Carlos
dc.contributor.authorCarvalho, Margarida Lima
dc.contributor.authorOliveira, Claudio [UNESP]
dc.contributor.authorForesti, Fausto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade do Estado de Mato Grosso - UNEMAT
dc.contributor.institutionCentro Universitário Toledo - UNITOLEDO
dc.contributor.institutionCentro de Ciências Biológicas e Naturais
dc.date.accessioned2021-06-25T11:07:14Z
dc.date.available2021-06-25T11:07:14Z
dc.date.issued2020-01-01
dc.description.abstractThe cytogenetic characteristics of five fish species of the Moenkhausia are described, based on the analysis of specimens collected in different headwater. All the species analyzed presented 2n=50 chromosomes. The C-banding revealed a similar distribution pattern of heterochromatic blocks in all the species, except Moenkhausia nigromarginata. The 5S rDNA sites were distributed on multiple chromosome pairs in all five species. Single and multiple histone H1 sites were observed in all the species, and histone H1 was shown to be co-located with the 18S rRNA gene in a single chromosome pair. The U2 snDNA gene was distributed at multiple sites in all the Moenkhausia species. The presence of B microchromosomes was confirmed in Moenkhausia forestii, while individuals of the three study populations of Moenkhausia oligolepis presented three morphologically distinct types of B chromosome. The chromosomal mapping of the 18S rDNA sites using the FISH technique revealed signals in the B chromosomes ofM. forestii, while clusters of the H1 histone and U2 snDNA genes were found in the B chromosomes of M. forestii and M. oligolepis. The classical and molecular cytogenetic markers used in this study revealed ample variation in the Moenkhausia karyotypes, reflecting the dynamic nature of the chromosomal evolution.en
dc.description.affiliationUniversidade Estadual Paulista - UNESP Instituto de Biociências Departamento de Biologia Estrutural e Funcional
dc.description.affiliationUniversidade do Estado de Mato Grosso - UNEMAT Departamento de Ciências Biológicas
dc.description.affiliationCentro Universitário Toledo - UNITOLEDO
dc.description.affiliationUniversidade Federal do Acre - UFAC Centro de Ciências Biológicas e Naturais
dc.description.affiliationUniversidade Estadual Paulista Instituto de Biociências Departamento de Biologia Estrutural e Funcional, Rubião Junior S/N
dc.description.affiliationUnespUniversidade Estadual Paulista - UNESP Instituto de Biociências Departamento de Biologia Estrutural e Funcional
dc.description.affiliationUnespUniversidade Estadual Paulista Instituto de Biociências Departamento de Biologia Estrutural e Funcional, Rubião Junior S/N
dc.format.extent1-9
dc.identifierhttp://dx.doi.org/10.1590/1678-4685-GMB-2020-0027
dc.identifier.citationGenetics and Molecular Biology, v. 43, n. 4, p. 1-9, 2020.
dc.identifier.doi10.1590/1678-4685-GMB-2020-0027
dc.identifier.fileS1415-47572020000600205.pdf
dc.identifier.issn1678-4685
dc.identifier.issn1415-4757
dc.identifier.scieloS1415-47572020000600205
dc.identifier.scopus2-s2.0-85096129232
dc.identifier.urihttp://hdl.handle.net/11449/208148
dc.language.isoeng
dc.relation.ispartofGenetics and Molecular Biology
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectChromosomal mapping
dc.subjectFish karyotypes
dc.subjectMultigenic families
dc.subjectRepetitive DNA
dc.subjectSupernumerary chromosomes
dc.titleMolecular cytogenetic analyses reveal extensive chromosomal rearrangements and novel B chromosomes in Moenkhausia (Teleostei, characidae)en
dc.typeArtigo
unesp.author.orcid0000-0001-9652-1596[1]

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