Genome-wide sequence divergence of satellite DNA could underlie meiotic failure in male hybrids of bighead catfish and North African catfish (Clarias, Clariidae)
Language English Country United States Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
38795738
DOI
10.1016/j.ygeno.2024.110868
PII: S0888-7543(24)00089-2
Knihovny.cz E-resources
- Keywords
- Chromosome pairing, Clariid catfish, Hybrid sterility, Immunostaining, Synaptonemal complex,
- MeSH
- Genome MeSH
- Hybridization, Genetic * MeSH
- Meiosis * MeSH
- Infertility, Male * genetics veterinary MeSH
- Fish Diseases * genetics MeSH
- DNA, Satellite * genetics MeSH
- Catfishes * genetics MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Geographicals
- Africa, Northern MeSH
- Names of Substances
- DNA, Satellite * MeSH
Hybrid sterility, a hallmark of postzygotic isolation, arises from parental genome divergence disrupting meiosis. While chromosomal incompatibility is often implicated, the underlying mechanisms remain unclear. This study investigated meiotic behavior and genome-wide divergence in bighead catfish (C. macrocephalus), North African catfish (C. gariepinus), and their sterile male hybrids (important in aquaculture). Repetitive DNA analysis using bioinformatics and cytogenetics revealed significant divergence in satellite DNA (satDNA) families between parental species. Notably, one hybrid exhibited successful meiosis and spermatozoa production, suggesting potential variation in sterility expression. Our findings suggest that genome-wide satDNA divergence, rather than chromosome number differences, likely contributes to meiotic failure and male sterility in these catfish hybrids.
Department of Aquaculture Faculty of Fisheries Kasetsart University Bangkok 10900 Thailand
Kalasin Fish Hatchery Farm Buaban Yangtalad District Kalasin 46120 Thailand
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