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Campo DC | Valor | Idioma |
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dc.contributor.author | Viana, Patrik Ferreira | - |
dc.contributor.author | Ezaz, Tariq Tariq | - |
dc.contributor.author | Marajó, Leandro | - |
dc.contributor.author | Ferreira, Milena | - |
dc.contributor.author | Zuanon, Jansen | - |
dc.contributor.author | Cioffi, Marcelo de Bello | - |
dc.contributor.author | Bertollo, Luiz Antônio Carlos | - |
dc.contributor.author | Gross, Maria Claudia | - |
dc.contributor.author | Feldberg, Eliana | - |
dc.date.accessioned | 2020-06-15T21:37:52Z | - |
dc.date.available | 2020-06-15T21:37:52Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/16988 | - |
dc.description.abstract | The genus Colomesus is the sole representative of the family Tetraodontidae in the Amazon region. Here, Colomesus asellus was analyzed using conventional and molecular cytogenetic protocols. Its diploid chromosome number is 2n = 46 with 12 meta-, 10 submeta-, 16 subtelo-, and 8 acrocentric chromosomes and a fundamental number of FN = 84. An XX/XY sex chromosome system was identified. Mapping of 18S rDNA correlated with the nucleolus organizer regions (Ag-NORs) in the short arms of the 2 X chromosomes in females and in the Y chromosome in males. C-banding revealed heterochromatin in the centromeric regions of all chromosomes, except for pair 3. Prominent sex chromosome-specific heterochromatin amplification was observed, covering the short arms of the Y chromosome almost entirely. FISH with telomeric and tropomyosin (tpm1) sequences, respectively, revealed terminal signals in all chromosomes. The analysis of extended DNA fibers confirmed the colocalization and the interspersed pattern of the telomeric and tpm1 sequences. Thus, this study highlights the remarkable evolutionary dynamism presented by the Amazonian puffer fish regarding the differentiation of a heteromorphic XY sex chromosome system and a particular sex-specific amplification of rDNA sites. This is the first record of such an association in the Tetraodontidae family. © 2018 S. Karger AG, Basel. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 153, Número 2, Pags. 96-104 | pt_BR |
dc.rights | Restrito | * |
dc.subject | Dna 18s | en |
dc.subject | Repetitive Dna | en |
dc.subject | Tropomyosin | en |
dc.subject | Cell Nucleus Antigen | en |
dc.subject | Nucleolar Organizer Region Associated Proteins | en |
dc.subject | Ribosome Dna | en |
dc.subject | Rna 18s | en |
dc.subject | Tropomyosin | en |
dc.subject | Acrocentric Chromosome | en |
dc.subject | C Banding | en |
dc.subject | Chromosome Nor | en |
dc.subject | Chromosome Number | en |
dc.subject | Cytogenetics | en |
dc.subject | Diploidy | en |
dc.subject | Female | en |
dc.subject | In Situ Hybridization, Fluorescence | en |
dc.subject | Heterochromatin | en |
dc.subject | Karyotype | en |
dc.subject | Male | en |
dc.subject | Nonhuman | en |
dc.subject | Priority Journal | en |
dc.subject | Puffer Fish | en |
dc.subject | Sex Chromosome | en |
dc.subject | Telomere | en |
dc.subject | X Chromosome | en |
dc.subject | Y Chromosome | en |
dc.subject | Animals | en |
dc.subject | Chromosome Banding Pattern | en |
dc.subject | Gene Amplification | en |
dc.subject | Genetics | en |
dc.subject | Nucleotide Repeat | en |
dc.subject | Sex Chromosome | en |
dc.subject | Sex Determination Processes | en |
dc.subject | Tetraodontiformes | en |
dc.subject | Ultrastructure | en |
dc.subject | Animal | en |
dc.subject | Antigens, Nuclear | en |
dc.subject | Chromosome Banding | en |
dc.subject | Ribosomal Dna | en |
dc.subject | Female | en |
dc.subject | Gene Amplification | en |
dc.subject | In Situ Hybridization, Fluorescence | en |
dc.subject | Male | en |
dc.subject | Repetitive Sequences, Nucleic Acid | en |
dc.subject | Rna, Ribosomal, 18s | en |
dc.subject | Sex Chromosomes | en |
dc.subject | Sex Determination Processes | en |
dc.subject | Telomere | en |
dc.subject | Tetraodontiformes | en |
dc.subject | Tropomyosin | en |
dc.title | Genomic Organization of Repetitive DNAs and Differentiation of an XX/XY Sex Chromosome System in the Amazonian Puffer Fish, Colomesus asellus (Tetraodontiformes) | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1159/000484423 | - |
dc.publisher.journal | Cytogenetic and Genome Research | pt_BR |
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