ArticleComparative cytogenetics2015
Repetitive sequences: the hidden diversity of heterochromatin in prochilodontid fish.
Article in Comparative cytogenetics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 13 citations in OpenAlex.
- Molecular cytogenetics provides insights into heterochromatin composition and karyotypic evolution in species of the Plebeia group (Apidae: Meliponini).Molecular cytogenetics · 2026Article
- Chromosomal characterization of three species of Serrasalmini (Serrasalmidae: Characiformes).Genetics and molecular biology · 2023Article
- Telomeres and Their Neighbors.Genes · 2022Review
- Multiple heterochromatin diversification events in the genome of fungus-farming ants: insights from repetitive sequences.Chromosoma · 2022Article
- Organization and expression analysis of 5S and 45S ribosomal DNA clusters in autotetraploid Carassius auratus.BMC ecology and evolution · 2021Article
- A new view on the scenario of karyotypic stasis in Epinephelidae fish: Cytogenetic, historical, and biogeographic approaches.Genetics and molecular biology · 2021Article
- Cytogenetic analysis of Bienertia sinuspersici Akhani as the first step in genome sequencing.Genes & genomics · 2020Article
- Review
- A new multiple sex chromosome system XGenetica · 2016Article
- Differential repetitive DNA composition in the centromeric region of chromosomes of Amazonian lizard species in the family Teiidae.Comparative cytogenetics · 2016Article
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Authors and funding
9 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The structure and organization of repetitive elements in fish genomes are still relatively poorly understood, although most of these elements are believed to be located in heterochromatic regions. Repetitive elements are considered essential in evolutionary processes as hotspots for mutations and chromosomal rearrangements, among other functions - thus providing new genomic alternatives and regulatory sites for gene expression. The present study sought to characterize repetitive DNA sequences in the genomes of Semaprochilodus insignis (Jardine & Schomburgk, 1841) and Semaprochilodus taeniurus (Valenciennes, 1817) and identify regions of conserved syntenic blocks in this genome fraction of three species of Prochilodontidae (Semaprochilodus insignis, Semaprochilodus taeniurus, and Prochilodus lineatus (Valenciennes, 1836) by cross-FISH using Cot-1 DNA (renaturation kinetics) probes. We found that the repetitive fractions of the genomes of Semaprochilodus insignis and Semaprochilodus taeniurus have significant amounts of conserved syntenic blocks in hybridization sites, but with low degrees of similarity between them and the genome of Prochilodus lineatus, especially in relation to B chromosomes. The cloning and sequencing of the repetitive genomic elements of Semaprochilodus insignis and Semaprochilodus taeniurus using Cot-1 DNA identified 48 fragments that displayed high similarity with repetitive sequences deposited in public DNA databases and classified as microsatellites, transposons, and retrotransposons. The repetitive fractions of the Semaprochilodus insignis and Semaprochilodus taeniurus genomes exhibited high degrees of conserved syntenic blocks in terms of both the structures and locations of hybridization sites, but a low degree of similarity with the syntenic blocks of the Prochilodus lineatus genome. Future comparative analyses of other prochilodontidae species will be needed to advance our understanding of the organization and evolution of the genomes in this group of fish.
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