Molecular divergence and genomic composition of B chromosomes in the fish Cyphocharax modestus (Characiformes, Curimatidae).

doi:10.1038/s41598-026-66448-7

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Article

Molecular divergence and genomic composition of B chromosomes in the fish Cyphocharax modestus (Characiformes, Curimatidae).

Scientific reports - 9 Sept 2026

Dos Santos Natalia, Sassi Francisco de Menezes Cavalcante, Dos Santos Rodrigo Zeni, Goes Caio Augusto Gomes, de Moraes Renata Luiza Rosa, Porto-Foresti Fabio, Liehr Thomas, Cioffi Marcelo de Bello, Utsunomia Ricardo

Abstract excerpt

B chromosomes are supernumerary elements that evolve from standard A chromosomes and are primarily composed of repetitive DNAs, yet their origin, diversification, and molecular composition remain poorly understood in most vertebrates. We investigated two allopatric populations of Cyphocharax modestus (Curimatidae) combining classical cytogenetics, comparative genomic hybridization (CGH), and comparative...

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Topics

Animals
Characiformes
Chromosomes
Karyotype
In Situ Hybridization, Fluorescence

Methodology Data sources Editorial policy Privacy Delete account & data About Contact Helena Bioinformatics

Comparative Genomic Hybridization

DNA, Satellite

Evolution, Molecular

Karyotyping

Genetic Variation

Genomics

Genome

Phylogeny

Source

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Identifiers

PMID: 42717220
DOI: 10.1038/s41598-026-66448-7
PMCID: PMC13558729

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