Occurrence of ZZ/ZW sex chromosomes in Thoracocharax stellatus fish (Characiformes, Gasteropelecidae) from the Araguaia River, south America

Registro completo de metadados
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorVenere, Paulo Cesar-
Autor(es): dc.creatorSouza, Issakar Lima-
Autor(es): dc.creatorMartins, Cesar-
Autor(es): dc.creatorOliveira, Claudio-
Data de aceite: dc.date.accessioned2021-03-10T17:12:18Z-
Data de disponibilização: dc.date.available2021-03-10T17:12:18Z-
Data de envio: dc.date.issued2014-05-20-
Data de envio: dc.date.issued2014-05-20-
Data de envio: dc.date.issued2008-06-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s10709-007-9194-x-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/18667-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/18667-
Descrição: dc.descriptionThe karyotypic and chromosomal characteristics of the hatchetfish Thoracocharax stellatus from the Araguaia River, Brazil (Araguaia-Tocantins basin) were analyzed using Giemsa, AgNO3, and CMA(3) fluorescent staining, and C-banding. The diploid chromosome number was 54 and the karyotypes of females and males were composed of six metacentrics, six submetacentrics, six subtelocentrics and 36 acrocentrics. Two impaired acrocentric chromosomes were detected in the female karyotype. C-banding showed heterochromatic blocks at several chromosomes and an entirely heterochromatic acrocentric chromosome in females that was lacking in the male karyotype. This discovery indicated a heteromorphic sex chromosome system of the ZZ/ZW type. Ag-staining and CMA(3) fluorescence revealed one major chromosome pair bearing the NORs with the presence of additional signals in some metaphases. Both heterochromatic segments associated with Ag-NORs and the W chromosome were positively stained by CMA(3). Considering the present data and previous findings it is hypothesized that the occurrence of ZW sex chromosome system is widespread in the genus Thoracocharax.-
Formato: dc.format109-112-
Idioma: dc.languageen-
Publicador: dc.publisherSpringer-
Relação: dc.relationGenetica-
Relação: dc.relation1.366-
Relação: dc.relation0,649-
Direitos: dc.rightsclosedAccess-
Palavras-chave: dc.subjectfish cytogenetics-
Palavras-chave: dc.subjectchromosome banding-
Palavras-chave: dc.subjectheteromorphic sex chromosomes-
Palavras-chave: dc.subjecthatchetfish-
Título: dc.titleOccurrence of ZZ/ZW sex chromosomes in Thoracocharax stellatus fish (Characiformes, Gasteropelecidae) from the Araguaia River, south America-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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