Journal
GENES
Volume 14, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/genes14010091
Keywords
cytogenomics; satellite DNA; fish cytogenetics; repetitive DNA
Categories
Ask authors/readers for more resources
Satellite DNAs (satDNAs) are repeated sequences located on heterochromatin and evolve by concerted evolution. In this study, two satellitomes of Characiformes fish were characterized, showing conservation between species despite divergence 30 million years ago. The results suggest that long-life cycles and few genomic changes may slow down satDNA differentiation rates.
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available