ArticleCell genomics2024
Comparative genomics illuminates karyotype and sex chromosome evolution of sharks.
Article in Cell genomics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Bony fish genomes: Status and gaps.Journal of fish biology · 2026Review
- Chromosome-level assembly of the Critically Endangered school shark, Galeorhinus galeus (Linnaeus, 1758).Scientific data · 2026Article
- Silver chimaera genome highlights lineage-specific sex chromosome and opsin gene evolution in holocephalans.DNA research : an international journal for rapid publication of reports on genes and genomes · 2026Article
- Improved genome assembly of whale shark, the world's biggest fish: revealing intragenomic heterogeneity in molecular evolution.GigaScience · 2026Article
- Genome Architecture and Speciation in Plants and Animals.Molecular ecology · 2025Review
- Sharks and rays have the oldest vertebrate sex chromosome with unique sex determination mechanisms.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Hiding in plain sight: the Y chromosome and its reinvigorated role in evolutionary processes.Evolution letters · 2025Article
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Authors and funding
13 authors.
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Abstract
Chondrichthyes is an important lineage to reconstruct the evolutionary history of vertebrates. Here, we analyzed genome synteny for six chondrichthyan chromosome-level genomes. Our comparative analysis reveals a slow evolutionary rate of chromosomal changes, with infrequent but independent fusions observed in sharks, skates, and chimaeras. The chondrichthyan common ancestor had a proto-vertebrate-like karyotype, including the presence of 18 microchromosome pairs. The X chromosome is a conversed microchromosome shared by all sharks, suggesting a likely common origin of the sex chromosome at least 181 million years ago. We characterized the Y chromosomes of two sharks that are highly differentiated from the X except for a small young evolutionary stratum and a small pseudoautosomal region. We found that shark sex chromosomes lack global dosage compensation but that dosage-sensitive genes are locally compensated. Our study on shark chromosome evolution enhances our understanding of shark sex chromosomes and vertebrate chromosome evolution.
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