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Your search keyword '"Artoni, Roberto Ferreira"' showing total 11 results
Start Over Author "Artoni, Roberto Ferreira" Journal genetica
11 results on '"Artoni, Roberto Ferreira"'

5. Erratum to: Identification and chromosome mapping of repetitive elements in the Astyanax scabripinnis (Teleostei: Characidae) species complex

Author

Barbosa, Patrícia, primary, de Oliveira, Luiz Antonio, additional, Pucci, Marcela Baer, additional, Santos, Mateus Henrique, additional, Moreira-Filho, Orlando, additional, Vicari, Marcelo Ricardo, additional, Nogaroto, Viviane, additional, de Almeida, Mara Cristina, additional, and Artoni, Roberto Ferreira, additional

Published
2015
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6. Identification and chromosome mapping of repetitive elements in the Astyanax scabripinnis (Teleostei: Characidae) species complex

Author

Barbosa, Patrícia, primary, de Oliveira, Luiz Antonio, additional, Pucci, Marcela Baer, additional, Santos, Mateus Henrique, additional, Moreira-Filho, Orlando, additional, Vicari, Marcelo Ricardo, additional, Nogaroto, Viviane, additional, de Almeida, Mara Cristina, additional, and Artoni, Roberto Ferreira, additional

Published
2014
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7. Origin of the X1X1X2X2/X1X2Y sex chromosome system of Harttia punctata (Siluriformes, Loricariidae) inferred from chromosome painting and FISH with ribosomal DNA markers

Author

Blanco, Daniel Rodrigues, primary, Vicari, Marcelo Ricardo, additional, Lui, Roberto Laridondo, additional, Artoni, Roberto Ferreira, additional, de Almeida, Mara Cristina, additional, Traldi, Josiane Baccarin, additional, Margarido, Vladimir Pavan, additional, and Moreira-Filho, Orlando, additional

Published
2014
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11. Identification and chromosome mapping of repetitive elements in the Astyanax scabripinnis (Teleostei: Characidae) species complex.

Author

Barbosa P, de Oliveira LA, Pucci MB, Santos MH, Moreira-Filho O, Vicari MR, Nogaroto V, de Almeida MC, and Artoni RF

Subjects
Animals, Base Sequence, DNA, Satellite, Female, Genetics, Population, In Situ Hybridization, Fluorescence, Long Interspersed Nucleotide Elements, Male, Molecular Sequence Data, Sequence Alignment, Characidae genetics, Chromosome Mapping, Repetitive Sequences, Nucleic Acid
Abstract

Most part of the eukaryotic genome is composed of repeated sequences or multiple copies of DNA, which were considered as "junk DNA", and may be associated to the heterochromatin. In this study, three populations of Astyanax aff. scabripinnis from Brazilian rivers of Guaratinguetá and Pindamonhangaba (São Paulo) and a population from Maringá (Paraná) were analyzed concerning the localization of the nucleolar organizer regions (Ag-NORs), the As51 satellite DNA, the 18S ribosomal DNA (rDNA), and the 5S rDNA. Repeated sequences were also isolated and identified by the Cot - 1 method, which indicated similarity (90%) with the LINE UnaL2 retrotransposon. The fluorescence in situ hybridization (FISH) showed the retrotransposon dispersed and more concentrated markers in centromeric and telomeric chromosomal regions. These sequences were co-localized and interspaced with 18S and 5S rDNA and As51, confirmed by fiber-FISH essay. The B chromosome found in these populations pointed to a conspicuous hybridization with LINE probe, which is also co-located in As51 sequences. The NORs were active at unique sites of a homologous pair in the three populations. There were no evidences that transposable elements and repetitive DNA had influence in the transcriptional regulation of ribosomal genes in our analyses.

Published
2015
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