The Satellite DNA Catalogues of Two Serrasalmidae (Teleostei, Characiformes): Conservation of General satDNA Features over 30 Million Years

• Autor(a) principal: Goes, Caio Augusto Gomes [UNESP]
• Data de Publicação: 2023
• Outros Autores: dos Santos, Natalia [UNESP], Rodrigues, Pedro Henrique de Mira [UNESP], Stornioli, José Henrique Forte, Silva, Amanda Bueno da [UNESP], dos Santos, Rodrigo Zeni [UNESP], Vidal, Jhon Alex Dziechciarz, Silva, Duílio Mazzoni Zerbinato de Andrade [UNESP], Artoni, Roberto Ferreira, Foresti, Fausto [UNESP], Hashimoto, Diogo Teruo [UNESP], Porto-Foresti, Fábio [UNESP], Utsunomia, Ricardo [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.3390/genes14010091; http://hdl.handle.net/11449/248258
• topic: cytogenomics; fish cytogenetics; repetitive DNA; satellite DNA

Satellite DNAs (satDNAs) are tandemly repeated sequences that are usually located on the heterochromatin, and the entire collection of satDNAs within a genome is called satellitome. Primarily, these sequences are not under selective pressure and evolve by concerted evolution, resulting in elevated rates of divergence between the satDNA profiles of reproductive isolated species/populations. Here, we characterized two additional satellitomes of Characiformes fish (Colossoma macropomum and Piaractus mesopotamicus) that diverged approximately 30 million years ago, while still retaining conserved karyotype features. The results we obtained indicated that several satDNAs (50% of satellite sequences in P. mesopotamicus and 43% in C. macropomum) show levels of conservation between the analyzed species, in the nucleotide and chromosomal levels. We propose that long-life cycles and few genomic changes could slow down rates of satDNA differentiation.