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Waldbieser GC, Liu S, Yuan Z, Older CE, Gao D, Shi C, Bosworth BG, Li N, Bao L, Kirby MA, Jin Y, Wood ML, Scheffler B, Simpson S, Youngblood RC, Duke MV, Ballard L, Phillippy A, Koren S, Liu Z. Reference genomes of channel catfish and blue catfish reveal multiple pericentric chromosome inversions. BMC Biol 2023; 21:67. [PMID: 37013528 PMCID: PMC10071708 DOI: 10.1186/s12915-023-01556-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 03/08/2023] [Indexed: 04/05/2023] Open
Abstract
BACKGROUND Channel catfish and blue catfish are the most important aquacultured species in the USA. The species do not readily intermate naturally but F1 hybrids can be produced through artificial spawning. F1 hybrids produced by mating channel catfish female with blue catfish male exhibit heterosis and provide an ideal system to study reproductive isolation and hybrid vigor. The purpose of the study was to generate high-quality chromosome level reference genome sequences and to determine their genomic similarities and differences. RESULTS We present high-quality reference genome sequences for both channel catfish and blue catfish, containing only 67 and 139 total gaps, respectively. We also report three pericentric chromosome inversions between the two genomes, as evidenced by long reads across the inversion junctions from distinct individuals, genetic linkage mapping, and PCR amplicons across the inversion junctions. Recombination rates within the inversional segments, detected as double crossovers, are extremely low among backcross progenies (progenies of channel catfish female × F1 hybrid male), suggesting that the pericentric inversions interrupt postzygotic recombination or survival of recombinants. Identification of channel catfish- and blue catfish-specific genes, along with expansions of immunoglobulin genes and centromeric Xba elements, provides insights into genomic hallmarks of these species. CONCLUSIONS We generated high-quality reference genome sequences for both blue catfish and channel catfish and identified major chromosomal inversions on chromosomes 6, 11, and 24. These perimetric inversions were validated by additional sequencing analysis, genetic linkage mapping, and PCR analysis across the inversion junctions. The reference genome sequences, as well as the contrasted chromosomal architecture should provide guidance for the interspecific breeding programs.
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Affiliation(s)
- Geoffrey C Waldbieser
- USDA-ARS Warmwater Aquaculture Research Unit, 141 Experiment Station Road, P.O. Box 38, Stoneville, MS, 38776, USA
| | - Shikai Liu
- MOE Key Laboratory of Mariculture and College of Fisheries, Ocean University of China, Qingdao, 266003, China
- The Fish Molecular Genetics and Biotechnology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, AL, 36849, USA
| | - Zihao Yuan
- The Fish Molecular Genetics and Biotechnology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, AL, 36849, USA
| | - Caitlin E Older
- USDA-ARS Warmwater Aquaculture Research Unit, 141 Experiment Station Road, P.O. Box 38, Stoneville, MS, 38776, USA
| | - Dongya Gao
- Department of Biology, College of Arts and Sciences, Syracuse University, Syracuse, NY, 13244, USA
| | - Chenyu Shi
- MOE Key Laboratory of Mariculture and College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Brian G Bosworth
- USDA-ARS Warmwater Aquaculture Research Unit, 141 Experiment Station Road, P.O. Box 38, Stoneville, MS, 38776, USA
| | - Ning Li
- The Fish Molecular Genetics and Biotechnology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, AL, 36849, USA
| | - Lisui Bao
- The Fish Molecular Genetics and Biotechnology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, AL, 36849, USA
| | - Mona A Kirby
- USDA-ARS Warmwater Aquaculture Research Unit, 141 Experiment Station Road, P.O. Box 38, Stoneville, MS, 38776, USA
| | - Yulin Jin
- The Fish Molecular Genetics and Biotechnology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, AL, 36849, USA
| | - Monica L Wood
- USDA-ARS Warmwater Aquaculture Research Unit, 141 Experiment Station Road, P.O. Box 38, Stoneville, MS, 38776, USA
| | - Brian Scheffler
- US Department of Agriculture, Agricultural Research Service, Genomics and Bioinformatics Research Unit, Stoneville, MS, USA
| | - Sheron Simpson
- US Department of Agriculture, Agricultural Research Service, Genomics and Bioinformatics Research Unit, Stoneville, MS, USA
| | - Ramey C Youngblood
- Institute for Genomics, Biocomputing, and Biotechnology, Mississippi State University, Starkville, MS, 39762, USA
| | - Mary V Duke
- US Department of Agriculture, Agricultural Research Service, Genomics and Bioinformatics Research Unit, Stoneville, MS, USA
| | - Linda Ballard
- USDA-ARS Warmwater Aquaculture Research Unit, 141 Experiment Station Road, P.O. Box 38, Stoneville, MS, 38776, USA
| | - Adam Phillippy
- Genome Informatics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Sergey Koren
- Genome Informatics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Zhanjiang Liu
- Department of Biology, College of Arts and Sciences, Syracuse University, Syracuse, NY, 13244, USA.
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Ye M, Lin X, Zhang Y, Huang Y, Li G, Tian C. Genome-Wide Identification and Characterization of Olfactory Receptor Genes in Silver Sillago (Sillago sihama). Animals (Basel) 2023; 13:ani13071232. [PMID: 37048487 PMCID: PMC10093537 DOI: 10.3390/ani13071232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
Olfactory receptor (OR) genes are essential in the specific recognition of diverse stimuli in fish. In this study, a total of 141 OR genes were identified in silver sillago (Sillago sihama), a marine fish sensitive to environmental stimuli, including 112 intact genes, 26 truncated genes, and three pseudogenes. A phylogenetic tree analysis elucidated that the OR genes of S. sihama were classified into six groups, of which β, γ, δ, ε, and ζ groups belonged to type I, and the η group belonged to type II. The type I OR genes contained almost all conserved motifs (n = 62), while type II OR genes mainly retained conserved motifs 7(3), 1, 10, 4, and 2 (n = 39). OR genes were mainly distributed on LG1, LG9, LG11, and LG12. Of all OR genes, 36.23% (50 genes) showed significant expansion in S. sihama. Ka/Ks analysis demonstrated that 227 sites were under purifying selection, while 12 sites were under positive selection, including eight genes in the OR2A12 gene subfamily. Sixty-one genes (44.20%) displayed differential expression under hypoxic stress. The identified OR genes explored the mechanism of environmental stress and ecological adaptation of S. sihama, and provided valuable genomic resources for further research on the olfaction of teleosts.
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Affiliation(s)
- Minghui Ye
- Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
| | - Xinghua Lin
- Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yulei Zhang
- Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Engineering Laboratory for Mariculture Organism Breeding, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, Zhanjiang 524088, China
| | - Yang Huang
- Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Engineering Laboratory for Mariculture Organism Breeding, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, Zhanjiang 524088, China
| | - Guangli Li
- Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Engineering Laboratory for Mariculture Organism Breeding, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, Zhanjiang 524088, China
| | - Changxu Tian
- Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Engineering Laboratory for Mariculture Organism Breeding, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, Zhanjiang 524088, China
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