| Revista: | Genetics and molecular biology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000459247 |
| ISSN: | 1415-4757 |
| Autors: | Deon, Geize Aparecida1 Glugoski, Larissa1 Hatanaka, Terumi1 Sassi, Francisco de Menezes Cavalcante1 Nogaroto, Viviane2 Bertollo, Luiz Antonio Carlos1 Liehr, Thomas3 Al Rikabi, Ahmed3 Moreira Filho, Orlando1 Cioffi, Marcelo de Bello1 Vicari, Marcelo Ricardo2 |
| Institucions: | 1Universidade Federal de Sao Carlos, Departamento de Genetica e Evolucao, Sao Carlos, Sao Paulo. Brasil 2Universidade Estadual de Ponta Grossa, Departamento de Biologia Estrutural, Molecular e Genetica, Ponta Grossa, Parana. Brasil 3University Hospital Jena, Institute of Human Genetics, Jena, Thuringen. Alemania |
| Any: | 2022 |
| Volum: | 45 |
| Número: | 2 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | The Neotropical armored catfish genus Harttia presents a wide variation of chromosomal rearrangements among its representatives. Studies indicate that translocation and Robertsonian rearrangements have triggered the karyotype evolution in the genus, including differentiation of sex chromosome systems. However, few studies used powerful tools, such as comparative whole chromosome painting, to clarify this highly diversified scenario. Here, we isolated probes from the X1 (a 5S rDNA carrier) and the X2 (a 45S rDNA carrier) chromosomes of Harttia punctata, which displays an X1X1X2X2/X1X2Y multiple sex chromosome system. Those probes were applied in other Harttia species to evidence homeologous chromosome blocks. The resulting data reinforce that translocation events played a role in the origin of the X1X2Y sex chromosome system in H. punctata. The repositioning of homologous chromosomal blocks carrying rDNA sites among ten Harttia species has also been demonstrated. Anchored to phylogenetic data it was possible to evidence some events of the karyotype diversification of the studied species and to prove an independent origin for the two types of multiple sex chromosomes, XX/XY1Y2 and X1X1X2X2/X1X2Y, that occur in Harttia species. The results point to evolutionary breakpoint regions in the genomes within or adjacent to rDNA sites that were widely reused in Harttia chromosome remodeling |
| Disciplines | Biología |
| Paraules clau: | Genética, Peces, Evolución y filogenia, Rearreglo cromosómico, Harttia, Siluriformes, Cromosomas sexuales |
| Keyword: | Genetics, Fish, Evolution and phylogeny, Harttia, Siluriformes, Chromosomal rearrangement, Sex chromosomes |
| Text complet: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
