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.

Animal Genomics and Bioresource Research Unit Department of Forest Biology Faculty of Forestry Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand

Animal Genomics and Bioresource Research Unit Department of Forest Biology Faculty of Forestry Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Department of Genetics Faculty of Science Kasetsart University Chatuchak Bangkok 10900 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Department of Aquaculture Faculty of Fisheries Kasetsart University Bangkok 10900 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Department of Botany Faculty of Science Kasetsart University Bangkok 10900 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Department of Fishery Biology Faculty of Fisheries Kasetsart University Bangkok 10900 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Department of Genetics Faculty of Science Kasetsart University Chatuchak Bangkok 10900 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Department of Genetics Faculty of Science Kasetsart University Chatuchak Bangkok 10900 Thailand; Pathum Thani Aquatic Animal Genetics Research and Development Center Aquatic Animal Genetics Research and Development Division Department of Fisheries Pathum Thani 12120 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Department of Microbiology Dankook University Cheonan 31116 Republic of Korea; Bio Medical Engineering Core Facility Research Center Dankook University Cheonan 31116 Republic of Korea

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; Faculty of Interdisciplinary Studies Khon Kaen University Nong Kom Ko Mueang Nong Khai District Nong Khai 43000 Thailand

Animal Genomics and Bioresource Research Unit Faculty of Science Kasetsart University 50 Ngamwongwan Chatuchak Bangkok 10900 Thailand; School of Agriculture and Cooperatives Sukhothai Thammathirat Open University Nonthaburi 11120 Thailand

CIIMAR CIMAR Interdisciplinary Centre of Marine and Environmental Research University of Porto Terminal de Cruzeiros do Porto de Leixões Av General Norton de Matos s n 4450 208 Porto Portugal; Department of Biology Faculty of Sciences University of Porto Rua do Campo Alegre s n 4169 007 Porto Portugal

Department of Aquaculture Faculty of Fisheries Kasetsart University Bangkok 10900 Thailand

Faculty of Natural Resources and Agro Industry Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus Sakon Nakhon 47000 Thailand

Kalasin Fish Hatchery Farm Buaban Yangtalad District Kalasin 46120 Thailand

Laboratory of Non Mendelian Evolution Institute of Animal Physiology and Genetics Czech Academy of Sciences Rumburská 89 Liběchov 27721 Czech Republic

Research Unit of Systems Microbiology Department of Biochemistry Faculty of Medicine Chulalongkorn University Bangkok 10330 Thailand

Citace poskytuje Crossref.org

Meiotic deviations and endoreplication lead to diploid oocytes in female hybrids between bighead catfish (Clarias macrocephalus) and North African catfish (Clarias gariepinus)