ArticleMolecular genetics and genomics : MGG2025
Genomic landscape of repetitive DNAs in Neotropical electric fishes.
Article in Molecular genetics and genomics : MGG, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Satellite DNA Genomics: The Ongoing Story.International journal of molecular sciences · 2025Review
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Authors and funding
5 authors.
Funding
Abstract
The Neotropical electric fishes of the order Gymnotiformes, known for their unique electrogenic and electrosensory systems, provide exceptional models for investigating ecological and evolutionary questions. While their phylogenetic and cytogenetic diversity is well documented, information about the diversity and evolution of repetitive DNA in gymnotiform genomes remains limited. To understand how repetitive DNA has shaped genome evolution in this group, we conducted bioinformatic analyses on raw sequencing data and genome assemblies from multiple species representing three major families. Our analysis revealed that closely related species share similar patterns of repetitive DNA composition, with Gymnotidae and Apteronotidae exhibiting the highest (16.5%) and lowest (9.4%) proportions of repetitive DNA, respectively. We identified 40 satellite DNA families, with five exclusive to Gymnotidae, twenty-two to Hypopomidae, and six shared between Apteronotidae species. Only one satellite DNA (NEFSat3-18) was conserved across all analyzed species, suggesting rapid evolutionary turnover of these sequences. The evolutionary dynamics of transposable elements varied among families, with Gymnotidae showing recent expansion of LINE elements and DNA transposons, while Apteronotidae displayed more ancient patterns of transposon activity. Analysis of transposable element landscapes revealed that all species experienced at least one burst of transposition during their evolution. Our findings demonstrate that repetitive DNA diversification parallels the evolutionary history of gymnotiform species. We also present a comprehensive dataset of repetitive DNA sequences that can be used as cytogenomic markers in comparative and evolutionary studies.
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