| Revista: | Genetics and molecular biology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000459168 |
| ISSN: | 1415-4757 |
| Autors: | Santos, Alan Gomes dos1 Souza, José Francisco de Sousa e1 Soares, Simone Cardoso1 Nakayama, Celeste Mutuko2 Feldberg, Eliana1 |
| Institucions: | 1Instituto Nacional de Pesquisas da Amazonia, Manaus, Amazonas. Brasil 2Instituto Nacional de Pesquisas da Amazonia, Coordenacao de Biodiversidade, Manaus, Amazonas. Brasil |
| Any: | 2023 |
| Volum: | 46 |
| Número: | 4 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | The tribe Serrasalmini is a diverse group with paraphyletic genera and taxonomic uncertainties. Several studies have been carried out in this group of fish in order to understand this problem, including the cytogenetic approach. In this study, three species of a clade of Serrasalmini were characterized cytogenetically - Pristobrycon striolatus, Catoprion absconditus and Pygopristis denticulatus. The three species presented diploid number (2n) equal to 62 chromosomes, of one and two arms, with karyotypic formulas and species-specific fundamental numbers. Heterochromatin is centromeric and terminal (bi-telomeric) in most chromosomes, with a conspicuous interstitial block at pair 1 (m) in all three species. The nucleolar organizer regions were multiple and C-band positive, and their location was confirmed via 18S ribosomal DNA mapping; however, with additional sites. The 5S rDNA was located in interstitial region of long arm of pair 1 (m), in the three species (homeologous). Moreover, we observed synteny between 18S and 5S in the species C. absconditus and P. denticulatus, which, according to fiber-FISH, are interspersed. Thus, the maintenance of 2n (62) evidences the diversification of chromosomal formulas within the clade by non-Robertsonian rearrangements and reflects the paraphyly of the related species |
| Disciplines | Biología |
| Paraules clau: | Peces, Genética, Evolución y filogenia, Evolución cromosómica, Serrasalmini, Characiformes, Pirañas |
| Keyword: | Fish, Genetics, Evolution and phylogeny, Chromosomal evolution, Serrasalmini, Characiformes, Piranhas |
| Text complet: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
