First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)

Detalhes bibliográficos
Autor(a) principal: Hashimoto,Diogo Teruo
Data de Publicação: 2008
Outros Autores: Gonçalves,Vanessa Regina, Bortolozzi,Jehud, Foresti,Fausto, Porto-Foresti,Fábio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Genetics and Molecular Biology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200021
Resumo: Several species of the genus Astyanax have already been genetically studied, and B-chromosomes have been considered to be an interesting feature in some species of this group. In the present paper we report, for the first time, the occurrence of a B microchromosome in a natural population of A. altiparanae. This additional genomic element was identified as an acrocentric chromosome, similar in size to the smallest chromosomal pairs of the standard karyotype. Analysis of the constitutive heterochromatin pattern by C-banding evidenced heterochromatic blocks located on centromeric, pericentromeric, and interstitial regions of some chromosomes, and also positive marks in a subtelocentric chromosomal pair that presented the short arms entirely heterochromatic. The application of this methodology also revealed a heterochromatic pattern in the extra chromosome, a typical feature of supernumerary chromosomes.
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spelling First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)B chromosomesfish cytogeneticsAstyanax altiparanaeSeveral species of the genus Astyanax have already been genetically studied, and B-chromosomes have been considered to be an interesting feature in some species of this group. In the present paper we report, for the first time, the occurrence of a B microchromosome in a natural population of A. altiparanae. This additional genomic element was identified as an acrocentric chromosome, similar in size to the smallest chromosomal pairs of the standard karyotype. Analysis of the constitutive heterochromatin pattern by C-banding evidenced heterochromatic blocks located on centromeric, pericentromeric, and interstitial regions of some chromosomes, and also positive marks in a subtelocentric chromosomal pair that presented the short arms entirely heterochromatic. The application of this methodology also revealed a heterochromatic pattern in the extra chromosome, a typical feature of supernumerary chromosomes.Sociedade Brasileira de Genética2008-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200021Genetics and Molecular Biology v.31 n.1 suppl.0 2008reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47572008000200021info:eu-repo/semantics/openAccessHashimoto,Diogo TeruoGonçalves,Vanessa ReginaBortolozzi,JehudForesti,FaustoPorto-Foresti,Fábioeng2008-06-03T00:00:00Zoai:scielo:S1415-47572008000200021Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2008-06-03T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false
dc.title.none.fl_str_mv First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
title First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
spellingShingle First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
Hashimoto,Diogo Teruo
B chromosomes
fish cytogenetics
Astyanax altiparanae
title_short First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
title_full First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
title_fullStr First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
title_full_unstemmed First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
title_sort First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
author Hashimoto,Diogo Teruo
author_facet Hashimoto,Diogo Teruo
Gonçalves,Vanessa Regina
Bortolozzi,Jehud
Foresti,Fausto
Porto-Foresti,Fábio
author_role author
author2 Gonçalves,Vanessa Regina
Bortolozzi,Jehud
Foresti,Fausto
Porto-Foresti,Fábio
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Hashimoto,Diogo Teruo
Gonçalves,Vanessa Regina
Bortolozzi,Jehud
Foresti,Fausto
Porto-Foresti,Fábio
dc.subject.por.fl_str_mv B chromosomes
fish cytogenetics
Astyanax altiparanae
topic B chromosomes
fish cytogenetics
Astyanax altiparanae
description Several species of the genus Astyanax have already been genetically studied, and B-chromosomes have been considered to be an interesting feature in some species of this group. In the present paper we report, for the first time, the occurrence of a B microchromosome in a natural population of A. altiparanae. This additional genomic element was identified as an acrocentric chromosome, similar in size to the smallest chromosomal pairs of the standard karyotype. Analysis of the constitutive heterochromatin pattern by C-banding evidenced heterochromatic blocks located on centromeric, pericentromeric, and interstitial regions of some chromosomes, and also positive marks in a subtelocentric chromosomal pair that presented the short arms entirely heterochromatic. The application of this methodology also revealed a heterochromatic pattern in the extra chromosome, a typical feature of supernumerary chromosomes.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200021
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200021
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1415-47572008000200021
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
dc.source.none.fl_str_mv Genetics and Molecular Biology v.31 n.1 suppl.0 2008
reponame:Genetics and Molecular Biology
instname:Sociedade Brasileira de Genética (SBG)
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instname_str Sociedade Brasileira de Genética (SBG)
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institution SBG
reponame_str Genetics and Molecular Biology
collection Genetics and Molecular Biology
repository.name.fl_str_mv Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)
repository.mail.fl_str_mv ||editor@gmb.org.br
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