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Tian Z, Wei M, Xue R, Song L, Li H, Ji H, Xiao P, Sun J. Comparative study on the transcriptional activities of grass carp (Ctenopharyngodon idellus) peroxisome proliferator-activated receptors induced by different fatty acids. Comp Biochem Physiol B Biochem Mol Biol 2024; 275:111021. [PMID: 39151662 DOI: 10.1016/j.cbpb.2024.111021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 08/13/2024] [Accepted: 08/13/2024] [Indexed: 08/19/2024]
Abstract
Peroxisome proliferator-activated receptors (PPARs) are ligand-activated transcription factors that are part of the nuclear hormone receptor family, playing a crucial role in gene expression regulation. They serve as a connection between lipid metabolism disorders and innate immunity by being activated by fatty acids and their derivatives, facilitating signal transduction between the cell surface and nucleus. However, the specific transcriptional effects of different fatty acids (FAs) in fish are not yet fully understood. In our research, we identified and characterized PPARs in grass carp (Ctenopharyngodon idellus). The complete coding sequences of pparαa, pparαb, pparγ, pparδa, and pparδb were 1443 bp, 1404 bp, 1569 bp, 1551 bp, and 1560 bp in length, respectively. Pparα showed the highest expression in the liver, pparγ was mainly expressed in abdominal adipose tissue, and pparδ exhibited increased expression in the heart compared to other tissues. Gene localization analysis revealed that only pparδa was present in both the nucleus and cytoplasm, while the other four genes were exclusively located in the nucleus. Furthermore, our study explored the influence of various fatty acids (docosahexaenoic acid, palmitic acid, lauric acid and oleic acid at concentrations of 0, 50, 100, and 200 μM) on the transcriptional activities of different PPARs, demonstrating the diverse effects of fatty acid ligands on PPAR transcriptional activity. These results have significant implications for understanding the regulation of PPARs transcriptional activity.
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Affiliation(s)
- Zhiqi Tian
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Mingkui Wei
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Rongrong Xue
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Lei Song
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Handong Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Hong Ji
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Peizhen Xiao
- Beijing Sunpu Biochemical and Technology Co., Ltd., Beijing 100126, China
| | - Jian Sun
- College of Animal Science and Technology, Northwest A&F University, Yangling, China.
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2
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Wang B, Wu B, Liu X, Hu Y, Ming Y, Bai M, Liu J, Xiao K, Zeng Q, Yang J, Wang H, Guo B, Tan C, Hu Z, Zhao X, Li Y, Yue Z, Mei J, Jiang W, Yang Y, Li Z, Gao Y, Chen L, Jian J, Du H. Whole-genome Sequencing Reveals Autooctoploidy in Chinese Sturgeon and Its Evolutionary Trajectories. GENOMICS, PROTEOMICS & BIOINFORMATICS 2024; 22:qzad002. [PMID: 38862424 DOI: 10.1093/gpbjnl/qzad002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 09/12/2023] [Accepted: 09/20/2023] [Indexed: 06/13/2024]
Abstract
The order Acipenseriformes, which includes sturgeons and paddlefishes, represents "living fossils" with complex genomes that are good models for understanding whole-genome duplication (WGD) and ploidy evolution in fishes. Here, we sequenced and assembled the first high-quality chromosome-level genome for the complex octoploid Acipenser sinensis (Chinese sturgeon), a critically endangered species that also represents a poorly understood ploidy group in Acipenseriformes. Our results show that A. sinensis is a complex autooctoploid species containing four kinds of octovalents (8n), a hexavalent (6n), two tetravalents (4n), and a divalent (2n). An analysis taking into account delayed rediploidization reveals that the octoploid genome composition of Chinese sturgeon results from two rounds of homologous WGDs, and further provides insights into the timing of its ploidy evolution. This study provides the first octoploid genome resource of Acipenseriformes for understanding ploidy compositions and evolutionary trajectories of polyploid fishes.
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Affiliation(s)
- Binzhong Wang
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Bin Wu
- BGI-Shenzhen, Shenzhen 518083, China
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
| | - Xueqing Liu
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Yacheng Hu
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Yao Ming
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
| | - Mingzhou Bai
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby 2800, Denmark
| | - Juanjuan Liu
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Kan Xiao
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Qingkai Zeng
- River Basin Complex Administration Center, China Three Gorges Corporation, Yichang 443100, China
| | - Jing Yang
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Hongqi Wang
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
| | - Baifu Guo
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Chun Tan
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Zixuan Hu
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Xun Zhao
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Yanhong Li
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
| | - Zhen Yue
- BGI-Sanya, BGI-Shenzhen, Sanya 572025, China
| | - Junpu Mei
- BGI-Shenzhen, Shenzhen 518083, China
- BGI-Sanya, BGI-Shenzhen, Sanya 572025, China
| | - Wei Jiang
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Yuanjin Yang
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Zhiyuan Li
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
| | - Yong Gao
- Yangtze Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China
| | - Lei Chen
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- River Basin Complex Administration Center, China Three Gorges Corporation, Yichang 443100, China
| | - Jianbo Jian
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby 2800, Denmark
| | - Hejun Du
- Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China
- Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang 443100, China
- Yangtze River Biodiversity Research Center, China Three Gorges Corporation, Wuhan 430014, China
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3
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Yu D, Ren Y, Uesaka M, Beavan AJS, Muffato M, Shen J, Li Y, Sato I, Wan W, Clark JW, Keating JN, Carlisle EM, Dearden RP, Giles S, Randle E, Sansom RS, Feuda R, Fleming JF, Sugahara F, Cummins C, Patricio M, Akanni W, D'Aniello S, Bertolucci C, Irie N, Alev C, Sheng G, de Mendoza A, Maeso I, Irimia M, Fromm B, Peterson KJ, Das S, Hirano M, Rast JP, Cooper MD, Paps J, Pisani D, Kuratani S, Martin FJ, Wang W, Donoghue PCJ, Zhang YE, Pascual-Anaya J. Hagfish genome elucidates vertebrate whole-genome duplication events and their evolutionary consequences. Nat Ecol Evol 2024; 8:519-535. [PMID: 38216617 DOI: 10.1038/s41559-023-02299-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 12/04/2023] [Indexed: 01/14/2024]
Abstract
Polyploidy or whole-genome duplication (WGD) is a major event that drastically reshapes genome architecture and is often assumed to be causally associated with organismal innovations and radiations. The 2R hypothesis suggests that two WGD events (1R and 2R) occurred during early vertebrate evolution. However, the timing of the 2R event relative to the divergence of gnathostomes (jawed vertebrates) and cyclostomes (jawless hagfishes and lampreys) is unresolved and whether these WGD events underlie vertebrate phenotypic diversification remains elusive. Here we present the genome of the inshore hagfish, Eptatretus burgeri. Through comparative analysis with lamprey and gnathostome genomes, we reconstruct the early events in cyclostome genome evolution, leveraging insights into the ancestral vertebrate genome. Genome-wide synteny and phylogenetic analyses support a scenario in which 1R occurred in the vertebrate stem-lineage during the early Cambrian, and 2R occurred in the gnathostome stem-lineage, maximally in the late Cambrian-earliest Ordovician, after its divergence from cyclostomes. We find that the genome of stem-cyclostomes experienced an additional independent genome triplication. Functional genomic and morphospace analyses demonstrate that WGD events generally contribute to developmental evolution with similar changes in the regulatory genome of both vertebrate groups. However, appreciable morphological diversification occurred only in the gnathostome but not in the cyclostome lineage, calling into question the general expectation that WGDs lead to leaps of bodyplan complexity.
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Affiliation(s)
- Daqi Yu
- Key Laboratory of Zoological Systematics and Evolution and State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yandong Ren
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Masahiro Uesaka
- Laboratory for Evolutionary Morphology, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Japan
- Department of Ecological Developmental Adaptability Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Alan J S Beavan
- Bristol Palaeobiology Group, School of Biological Sciences, University of Bristol, Bristol, UK
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Matthieu Muffato
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK
- Tree of Life, Wellcome Sanger Institute, Hinxton, UK
| | - Jieyu Shen
- Key Laboratory of Zoological Systematics and Evolution and State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yongxin Li
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - Iori Sato
- Laboratory for Evolutionary Morphology, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Japan
- iPS Cell Advanced Characterization and Development Team, RIKEN BioResource Research Center, Tsukuba, Japan
| | - Wenting Wan
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China
| | - James W Clark
- Bristol Palaeobiology Group, School of Biological Sciences, University of Bristol, Bristol, UK
- Milner Centre for Evolution, University of Bath, Claverton Down, Bath, UK
| | - Joseph N Keating
- Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol, UK
| | - Emily M Carlisle
- Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol, UK
| | - Richard P Dearden
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
- Naturalis Biodiversity Center, Leiden, the Netherlands
| | - Sam Giles
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Emma Randle
- Department of Earth and Environmental Sciences, University of Manchester, Manchester, UK
| | - Robert S Sansom
- Department of Earth and Environmental Sciences, University of Manchester, Manchester, UK
| | - Roberto Feuda
- Department of Genetics and Genome Biology, University of Leicester, Leicester, UK
| | - James F Fleming
- Keio University Institute for Advanced Biosciences, Tsuruoka, Japan
- Natural History Museum, University of Oslo, Oslo, Norway
| | - Fumiaki Sugahara
- Division of Biology, Hyogo Medical University, Nishinomiya, Japan
- Evolutionary Morphology Laboratory, RIKEN Cluster for Pioneering Research (CPR), Kobe, Japan
| | - Carla Cummins
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK
| | - Mateus Patricio
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK
| | - Wasiu Akanni
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK
| | - Salvatore D'Aniello
- Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn Napoli, Villa Comunale, Napoli, Italy
| | - Cristiano Bertolucci
- Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn Napoli, Villa Comunale, Napoli, Italy
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Naoki Irie
- Research Center for Integrative Evolutionary Science, The Graduate University for Advanced Studies, SOKENDAI, Hayama, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Cantas Alev
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
| | - Guojun Sheng
- International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, Japan
| | - Alex de Mendoza
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Ignacio Maeso
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, University of Barcelona (UB), Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
| | - Manuel Irimia
- Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- ICREA, Barcelona, Spain
| | - Bastian Fromm
- The Arctic University Museum of Norway, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Kevin J Peterson
- Department of Biological Sciences, Dartmouth College, Hanover, NH, USA
| | - Sabyasachi Das
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, USA
- Emory Vaccine Center, Emory University, Atlanta, GA, USA
| | - Masayuki Hirano
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, USA
- Emory Vaccine Center, Emory University, Atlanta, GA, USA
| | - Jonathan P Rast
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, USA
- Emory Vaccine Center, Emory University, Atlanta, GA, USA
| | - Max D Cooper
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, GA, USA
- Emory Vaccine Center, Emory University, Atlanta, GA, USA
| | - Jordi Paps
- Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol, UK
| | - Davide Pisani
- Bristol Palaeobiology Group, School of Biological Sciences, University of Bristol, Bristol, UK
- Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol, UK
| | - Shigeru Kuratani
- Laboratory for Evolutionary Morphology, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Japan
- Evolutionary Morphology Laboratory, RIKEN Cluster for Pioneering Research (CPR), Kobe, Japan
| | - Fergal J Martin
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, UK.
| | - Wen Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.
- School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China.
- CAS Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China.
| | - Philip C J Donoghue
- Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol, UK.
| | - Yong E Zhang
- Key Laboratory of Zoological Systematics and Evolution and State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
- University of Chinese Academy of Sciences, Beijing, China.
- CAS Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China.
| | - Juan Pascual-Anaya
- Evolutionary Morphology Laboratory, RIKEN Cluster for Pioneering Research (CPR), Kobe, Japan.
- Department of Animal Biology, Faculty of Science, University of Málaga (UMA), Málaga, Spain.
- Edificio de Bioinnovación, Universidad de Málaga, Málaga, Spain.
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4
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Marlétaz F, Timoshevskaya N, Timoshevskiy VA, Parey E, Simakov O, Gavriouchkina D, Suzuki M, Kubokawa K, Brenner S, Smith JJ, Rokhsar DS. The hagfish genome and the evolution of vertebrates. Nature 2024; 627:811-820. [PMID: 38262590 PMCID: PMC10972751 DOI: 10.1038/s41586-024-07070-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 01/15/2024] [Indexed: 01/25/2024]
Abstract
As the only surviving lineages of jawless fishes, hagfishes and lampreys provide a crucial window into early vertebrate evolution1-3. Here we investigate the complex history, timing and functional role of genome-wide duplications4-7 and programmed DNA elimination8,9 in vertebrates in the light of a chromosome-scale genome sequence for the brown hagfish Eptatretus atami. Combining evidence from syntenic and phylogenetic analyses, we establish a comprehensive picture of vertebrate genome evolution, including an auto-tetraploidization (1RV) that predates the early Cambrian cyclostome-gnathostome split, followed by a mid-late Cambrian allo-tetraploidization (2RJV) in gnathostomes and a prolonged Cambrian-Ordovician hexaploidization (2RCY) in cyclostomes. Subsequently, hagfishes underwent extensive genomic changes, with chromosomal fusions accompanied by the loss of genes that are essential for organ systems (for example, genes involved in the development of eyes and in the proliferation of osteoclasts); these changes account, in part, for the simplification of the hagfish body plan1,2. Finally, we characterize programmed DNA elimination in hagfish, identifying protein-coding genes and repetitive elements that are deleted from somatic cell lineages during early development. The elimination of these germline-specific genes provides a mechanism for resolving genetic conflict between soma and germline by repressing germline and pluripotency functions, paralleling findings in lampreys10,11. Reconstruction of the early genomic history of vertebrates provides a framework for further investigations of the evolution of cyclostomes and jawed vertebrates.
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Affiliation(s)
- Ferdinand Marlétaz
- Centre for Life's Origins and Evolution, Department of Genetics, Evolution and Environment, University College London, London, UK.
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan.
| | | | | | - Elise Parey
- Centre for Life's Origins and Evolution, Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Oleg Simakov
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
- Department for Neurosciences and Developmental Biology, University of Vienna, Vienna, Austria
| | - Daria Gavriouchkina
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
- UK Dementia Research Institute, University College London, London, UK
| | - Masakazu Suzuki
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan
| | - Kaoru Kubokawa
- Ocean Research Institute, The University of Tokyo, Tokyo, Japan
| | - Sydney Brenner
- Comparative and Medical Genomics Laboratory, Institute of Molecular and Cell Biology, A*STAR, Biopolis, Singapore, Singapore
| | - Jeramiah J Smith
- Department of Biology, University of Kentucky, Lexington, KY, USA.
| | - Daniel S Rokhsar
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan.
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA.
- Chan Zuckerberg Biohub, San Francisco, CA, USA.
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5
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Redmond AK, Casey D, Gundappa MK, Macqueen DJ, McLysaght A. Independent rediploidization masks shared whole genome duplication in the sturgeon-paddlefish ancestor. Nat Commun 2023; 14:2879. [PMID: 37208359 DOI: 10.1038/s41467-023-38714-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 05/12/2023] [Indexed: 05/21/2023] Open
Abstract
Whole genome duplication (WGD) is a dramatic evolutionary event generating many new genes and which may play a role in survival through mass extinctions. Paddlefish and sturgeon are sister lineages that both show genomic evidence for ancient WGD. Until now this has been interpreted as two independent WGD events due to a preponderance of duplicate genes with independent histories. Here we show that although there is indeed a plurality of apparently independent gene duplications, these derive from a shared genome duplication event occurring well over 200 million years ago, likely close to the Permian-Triassic mass extinction period. This was followed by a prolonged process of reversion to stable diploid inheritance (rediploidization), that may have promoted survival during the Triassic-Jurassic mass extinction. We show that the sharing of this WGD is masked by the fact that paddlefish and sturgeon lineage divergence occurred before rediploidization had proceeded even half-way. Thus, for most genes the resolution to diploidy was lineage-specific. Because genes are only truly duplicated once diploid inheritance is established, the paddlefish and sturgeon genomes are thus a mosaic of shared and non-shared gene duplications resulting from a shared genome duplication event.
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Affiliation(s)
- Anthony K Redmond
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin, Ireland
| | - Dearbhaile Casey
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin, Ireland
| | - Manu Kumar Gundappa
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Daniel J Macqueen
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Aoife McLysaght
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin, Ireland.
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6
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Zhang J. What Has Genomics Taught An Evolutionary Biologist? GENOMICS, PROTEOMICS & BIOINFORMATICS 2023; 21:1-12. [PMID: 36720382 PMCID: PMC10373158 DOI: 10.1016/j.gpb.2023.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 01/06/2023] [Accepted: 01/19/2023] [Indexed: 01/30/2023]
Abstract
Genomics, an interdisciplinary field of biology on the structure, function, and evolution of genomes, has revolutionized many subdisciplines of life sciences, including my field of evolutionary biology, by supplying huge data, bringing high-throughput technologies, and offering a new approach to biology. In this review, I describe what I have learned from genomics and highlight the fundamental knowledge and mechanistic insights gained. I focus on three broad topics that are central to evolutionary biology and beyond-variation, interaction, and selection-and use primarily my own research and study subjects as examples. In the next decade or two, I expect that the most important contributions of genomics to evolutionary biology will be to provide genome sequences of nearly all known species on Earth, facilitate high-throughput phenotyping of natural variants and systematically constructed mutants for mapping genotype-phenotype-fitness landscapes, and assist the determination of causality in evolutionary processes using experimental evolution.
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Affiliation(s)
- Jianzhi Zhang
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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7
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Mulhair PO, Crowley L, Boyes DH, Harper A, Lewis OT, Holland PWH. Diversity, duplication, and genomic organization of homeobox genes in Lepidoptera. Genome Res 2023; 33:32-44. [PMID: 36617663 PMCID: PMC9977156 DOI: 10.1101/gr.277118.122] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 11/29/2022] [Indexed: 12/14/2022]
Abstract
Homeobox genes encode transcription factors with essential roles in patterning and cell fate in developing animal embryos. Many homeobox genes, including Hox and NK genes, are arranged in gene clusters, a feature likely related to transcriptional control. Sparse taxon sampling and fragmentary genome assemblies mean that little is known about the dynamics of homeobox gene evolution across Lepidoptera or about how changes in homeobox gene number and organization relate to diversity in this large order of insects. Here we analyze an extensive data set of high-quality genomes to characterize the number and organization of all homeobox genes in 123 species of Lepidoptera from 23 taxonomic families. We find most Lepidoptera have around 100 homeobox loci, including an unusual Hox gene cluster in which the lab gene is repositioned and the ro gene is next to pb A topologically associating domain spans much of the gene cluster, suggesting deep regulatory conservation of the Hox cluster arrangement in this insect order. Most Lepidoptera have four Shx genes, divergent zen-derived loci, but these loci underwent dramatic duplication in several lineages, with some moths having over 165 homeobox loci in the Hox gene cluster; this expansion is associated with local LINE element density. In contrast, the NK gene cluster content is more stable, although there are differences in organization compared with other insects, as well as major rearrangements within butterflies. Our analysis represents the first description of homeobox gene content across the order Lepidoptera, exemplifying the potential of newly generated genome assemblies for understanding genome and gene family evolution.
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Affiliation(s)
- Peter O Mulhair
- Department of Biology, University of Oxford, Oxford OX1 3SZ, United Kingdom
| | - Liam Crowley
- Department of Biology, University of Oxford, Oxford OX1 3SZ, United Kingdom
| | - Douglas H Boyes
- Department of Biology, University of Oxford, Oxford OX1 3SZ, United Kingdom
- UK Centre for Ecology and Hydrology, Wallingford OX10 8BB, United Kingdom
| | - Amber Harper
- Department of Biology, University of Oxford, Oxford OX1 3SZ, United Kingdom
| | - Owen T Lewis
- Department of Biology, University of Oxford, Oxford OX1 3SZ, United Kingdom
| | - Peter W H Holland
- Department of Biology, University of Oxford, Oxford OX1 3SZ, United Kingdom
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8
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Mendizábal-Castillero M, Merlo MA, Cross I, Rodríguez ME, Rebordinos L. Genomic Characterization of hox Genes in Senegalese Sole ( Solea senegalensis, Kaup 1858): Clues to Evolutionary Path in Pleuronectiformes. Animals (Basel) 2022; 12:ani12243586. [PMID: 36552509 PMCID: PMC9774920 DOI: 10.3390/ani12243586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/12/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
The Senegalese sole (Solea senegalensis, Kaup 1858), a marine flatfish, belongs to the Pleuronectiformes order. It is a commercially important species for fisheries and aquaculture. However, in aquaculture, several production bottlenecks have still to be resolved, including skeletal deformities and high mortality during the larval and juvenile phase. The study aims to characterize the hox gene clusters in S. senegalensis to understand better the developmental and metamorphosis process in this species. Using a BAC library, the clones that contain hox genes were isolated, sequenced by NGS and used as BAC-FISH probes. Subsequently the hox clusters were studied by sequence analysis, comparative genomics, and cytogenetic and phylogenetic analysis. Cytogenetic analysis demonstrated the localization of four BAC clones on chromosome pairs 4, 12, 13, and 16 of the Senegalese sole cytogenomic map. Comparative and phylogenetic analysis showed a highly conserved organization in each cluster and different phylogenetic clustering in each hox cluster. Analysis of structural and repetitive sequences revealed accumulations of polymorphisms mediated by repetitive elements in the hoxba cluster, mainly retroelements. Therefore, a possible loss of the hoxb7a gene can be established in the Pleuronectiformes lineage. This work allows the organization and regulation of hox clusters to be understood, and is a good base for further studies of expression patterns.
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9
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Parey E, Louis A, Montfort J, Guiguen Y, Crollius HR, Berthelot C. An atlas of fish genome evolution reveals delayed rediploidization following the teleost whole-genome duplication. Genome Res 2022; 32:1685-1697. [PMID: 35961774 PMCID: PMC9528989 DOI: 10.1101/gr.276953.122] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/09/2022] [Indexed: 11/25/2022]
Abstract
Teleost fishes are ancient tetraploids descended from an ancestral whole-genome duplication that may have contributed to the impressive diversification of this clade. Whole-genome duplications can occur via self-doubling (autopolyploidy) or via hybridization between different species (allopolyploidy). The mode of tetraploidization conditions evolutionary processes by which duplicated genomes return to diploid meiotic pairing, and subsequent genetic divergence of duplicated genes (cytological and genetic rediploidization). How teleosts became tetraploid remains unresolved, leaving a fundamental gap in the interpretation of their functional evolution. As a result of the whole-genome duplication, identifying orthologous and paralogous genomic regions across teleosts is challenging, hindering genome-wide investigations into their polyploid history. Here, we combine tailored gene phylogeny methodology together with a state-of-the-art ancestral karyotype reconstruction to establish the first high-resolution comparative atlas of paleopolyploid regions across 74 teleost genomes. We then leverage this atlas to investigate how rediploidization occurred in teleosts at the genome-wide level. We uncover that some duplicated regions maintained tetraploidy for more than 60 million years, with three chromosome pairs diverging genetically only after the separation of major teleost families. This evidence suggests that the teleost ancestor was an autopolyploid. Further, we find evidence for biased gene retention along several duplicated chromosomes, contradicting current paradigms that asymmetrical evolution is specific to allopolyploids. Altogether, our results offer novel insights into genome evolutionary dynamics following ancient polyploidizations in vertebrates.
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Affiliation(s)
- Elise Parey
- Institut de Biologie de l'Ecole normale supérieure (IBENS), Département de Biologie, Ecole normale supérieure, CNRS, INSERM, Université PSL, 75005 Paris, France
- INRAE, LPGP, 35000, Rennes, France
| | - Alexandra Louis
- Institut de Biologie de l'Ecole normale supérieure (IBENS), Département de Biologie, Ecole normale supérieure, CNRS, INSERM, Université PSL, 75005 Paris, France
| | | | | | - Hugues Roest Crollius
- Institut de Biologie de l'Ecole normale supérieure (IBENS), Département de Biologie, Ecole normale supérieure, CNRS, INSERM, Université PSL, 75005 Paris, France
| | - Camille Berthelot
- Institut de Biologie de l'Ecole normale supérieure (IBENS), Département de Biologie, Ecole normale supérieure, CNRS, INSERM, Université PSL, 75005 Paris, France
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10
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Torres-Aguila NP, Salonna M, Hoppler S, Ferrier DEK. Evolutionary diversification of the canonical Wnt signaling effector TCF/LEF in chordates. Dev Growth Differ 2022; 64:120-137. [PMID: 35048372 PMCID: PMC9303524 DOI: 10.1111/dgd.12771] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/20/2021] [Accepted: 12/20/2021] [Indexed: 12/29/2022]
Abstract
Wnt signaling is essential during animal development and regeneration, but also plays an important role in diseases such as cancer and diabetes. The canonical Wnt signaling pathway is one of the most conserved signaling cascades in the animal kingdom, with the T‐cell factor/lymphoid enhancer factor (TCF/LEF) proteins being the major mediators of Wnt/β‐catenin‐regulated gene expression. In comparison with invertebrates, vertebrates possess a high diversity of TCF/LEF family genes, implicating this as a possible key change to Wnt signaling at the evolutionary origin of vertebrates. However, the precise nature of this diversification is only poorly understood. The aim of this study is to clarify orthology, paralogy, and isoform relationships within the TCF/LEF gene family within chordates via in silico comparative study of TCF/LEF gene structure, molecular phylogeny, and gene synteny. Our results support the notion that the four TCF/LEF paralog subfamilies in jawed vertebrates (gnathostomes) evolved via the two rounds of whole‐genome duplications that occurred during early vertebrate evolution. Importantly, gene structure comparisons and synteny analysis of jawless vertebrate (cyclostome) TCFs suggest that a TCF7L2‐like form of gene structure is a close proxy for the ancestral vertebrate structure. In conclusion, we propose a detailed evolutionary path based on a new pre‐whole‐genome duplication vertebrate TCF gene model. This ancestor gene model highlights the chordate and vertebrate innovations of TCF/LEF gene structure, providing the foundation for understanding the role of Wnt/β‐catenin signaling in vertebrate evolution.
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Affiliation(s)
- Nuria P Torres-Aguila
- Gatty Marine Laboratory, The Scottish Oceans Institute, School of Biology, University of St Andrews, St Andrews, UK
| | - Marika Salonna
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
| | - Stefan Hoppler
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
| | - David E K Ferrier
- Gatty Marine Laboratory, The Scottish Oceans Institute, School of Biology, University of St Andrews, St Andrews, UK
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11
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Gundappa MK, To TH, Grønvold L, Martin SAM, Lien S, Geist J, Hazlerigg D, Sandve SR, Macqueen DJ. Genome-Wide Reconstruction of Rediploidization Following Autopolyploidization across One Hundred Million Years of Salmonid Evolution. Mol Biol Evol 2022; 39:msab310. [PMID: 34718723 PMCID: PMC8760942 DOI: 10.1093/molbev/msab310] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The long-term evolutionary impacts of whole-genome duplication (WGD) are strongly influenced by the ensuing rediploidization process. Following autopolyploidization, rediploidization involves a transition from tetraploid to diploid meiotic pairing, allowing duplicated genes (ohnologs) to diverge genetically and functionally. Our understanding of autopolyploid rediploidization has been informed by a WGD event ancestral to salmonid fishes, where large genomic regions are characterized by temporally delayed rediploidization, allowing lineage-specific ohnolog sequence divergence in the major salmonid clades. Here, we investigate the long-term outcomes of autopolyploid rediploidization at genome-wide resolution, exploiting a recent "explosion" of salmonid genome assemblies, including a new genome sequence for the huchen (Hucho hucho). We developed a genome alignment approach to capture duplicated regions across multiple species, allowing us to create 121,864 phylogenetic trees describing genome-wide ohnolog divergence across salmonid evolution. Using molecular clock analysis, we show that 61% of the ancestral salmonid genome experienced an initial "wave" of rediploidization in the late Cretaceous (85-106 Ma). This was followed by a period of relative genomic stasis lasting 17-39 My, where much of the genome remained tetraploid. A second rediploidization wave began in the early Eocene and proceeded alongside species diversification, generating predictable patterns of lineage-specific ohnolog divergence, scaling in complexity with the number of speciation events. Using gene set enrichment, gene expression, and codon-based selection analyses, we provide insights into potential functional outcomes of delayed rediploidization. This study enhances our understanding of delayed autopolyploid rediploidization and has broad implications for future studies of WGD events.
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Affiliation(s)
- Manu Kumar Gundappa
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, United Kingdom
- School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Thu-Hien To
- Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Centre for Integrative Genetics (CIGENE), Norwegian University of Life Sciences, Ås, Norway
| | - Lars Grønvold
- Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Centre for Integrative Genetics (CIGENE), Norwegian University of Life Sciences, Ås, Norway
| | - Samuel A M Martin
- School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Sigbjørn Lien
- Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Centre for Integrative Genetics (CIGENE), Norwegian University of Life Sciences, Ås, Norway
| | - Juergen Geist
- Aquatic Systems Biology Unit, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - David Hazlerigg
- Department of Arctic and Marine Biology, Faculty of BioSciences Fisheries & Economy, University of Tromsø, Norway
| | - Simen R Sandve
- Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Centre for Integrative Genetics (CIGENE), Norwegian University of Life Sciences, Ås, Norway
| | - Daniel J Macqueen
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Midlothian, United Kingdom
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12
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Reconstruction of proto-vertebrate, proto-cyclostome and proto-gnathostome genomes provides new insights into early vertebrate evolution. Nat Commun 2021; 12:4489. [PMID: 34301952 PMCID: PMC8302630 DOI: 10.1038/s41467-021-24573-z] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 06/25/2021] [Indexed: 02/07/2023] Open
Abstract
Ancient polyploidization events have had a lasting impact on vertebrate genome structure, organization and function. Some key questions regarding the number of ancient polyploidization events and their timing in relation to the cyclostome-gnathostome divergence have remained contentious. Here we generate de novo long-read-based chromosome-scale genome assemblies for the Japanese lamprey and elephant shark. Using these and other representative genomes and developing algorithms for the probabilistic macrosynteny model, we reconstruct high-resolution proto-vertebrate, proto-cyclostome and proto-gnathostome genomes. Our reconstructions resolve key questions regarding the early evolutionary history of vertebrates. First, cyclostomes diverged from the lineage leading to gnathostomes after a shared tetraploidization (1R) but before a gnathostome-specific tetraploidization (2R). Second, the cyclostome lineage experienced an additional hexaploidization. Third, 2R in the gnathostome lineage was an allotetraploidization event, and biased gene loss from one of the subgenomes shaped the gnathostome genome by giving rise to remarkably conserved microchromosomes. Thus, our reconstructions reveal the major evolutionary events and offer new insights into the origin and evolution of vertebrate genomes.
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13
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Aase-Remedios ME, Ferrier DEK. Improved Understanding of the Role of Gene and Genome Duplications in Chordate Evolution With New Genome and Transcriptome Sequences. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.703163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Comparative approaches to understanding chordate genomes have uncovered a significant role for gene duplications, including whole genome duplications (WGDs), giving rise to and expanding gene families. In developmental biology, gene families created and expanded by both tandem and WGDs are paramount. These genes, often involved in transcription and signalling, are candidates for underpinning major evolutionary transitions because they are particularly prone to retention and subfunctionalisation, neofunctionalisation, or specialisation following duplication. Under the subfunctionalisation model, duplication lays the foundation for the diversification of paralogues, especially in the context of gene regulation. Tandemly duplicated paralogues reside in the same regulatory environment, which may constrain them and result in a gene cluster with closely linked but subtly different expression patterns and functions. Ohnologues (WGD paralogues) often diversify by partitioning their expression domains between retained paralogues, amidst the many changes in the genome during rediploidisation, including chromosomal rearrangements and extensive gene losses. The patterns of these retentions and losses are still not fully understood, nor is the full extent of the impact of gene duplication on chordate evolution. The growing number of sequencing projects, genomic resources, transcriptomics, and improvements to genome assemblies for diverse chordates from non-model and under-sampled lineages like the coelacanth, as well as key lineages, such as amphioxus and lamprey, has allowed more informative comparisons within developmental gene families as well as revealing the extent of conserved synteny across whole genomes. This influx of data provides the tools necessary for phylogenetically informed comparative genomics, which will bring us closer to understanding the evolution of chordate body plan diversity and the changes underpinning the origin and diversification of vertebrates.
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14
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Bayramov AV, Ermakova GV, Kuchryavyy AV, Zaraisky AG. Genome Duplications as the Basis of Vertebrates’ Evolutionary Success. Russ J Dev Biol 2021. [DOI: 10.1134/s1062360421030024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Simakov O, Marlétaz F, Yue JX, O'Connell B, Jenkins J, Brandt A, Calef R, Tung CH, Huang TK, Schmutz J, Satoh N, Yu JK, Putnam NH, Green RE, Rokhsar DS. Deeply conserved synteny resolves early events in vertebrate evolution. Nat Ecol Evol 2020; 4:820-830. [PMID: 32313176 PMCID: PMC7269912 DOI: 10.1038/s41559-020-1156-z] [Citation(s) in RCA: 185] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 02/19/2020] [Indexed: 01/24/2023]
Abstract
Although it is widely believed that early vertebrate evolution was shaped by ancient whole-genome duplications, the number, timing and mechanism of these events remain elusive. Here, we infer the history of vertebrates through genomic comparisons with a new chromosome-scale sequence of the invertebrate chordate amphioxus. We show how the karyotypes of amphioxus and diverse vertebrates are derived from 17 ancestral chordate linkage groups (and 19 ancestral bilaterian groups) by fusion, rearrangement and duplication. We resolve two distinct ancient duplications based on patterns of chromosomal conserved synteny. All extant vertebrates share the first duplication, which occurred in the mid/late Cambrian by autotetraploidization (that is, direct genome doubling). In contrast, the second duplication is found only in jawed vertebrates and occurred in the mid-late Ordovician by allotetraploidization (that is, genome duplication following interspecific hybridization) from two now-extinct progenitors. This complex genomic history parallels the diversification of vertebrate lineages in the fossil record.
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Affiliation(s)
- Oleg Simakov
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan.
- Department of Neuroscience and Developmental Biology, University of Vienna, Vienna, Austria.
| | - Ferdinand Marlétaz
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
- Centre for Life's Origins and Evolution, Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Jia-Xing Yue
- Université Côte d'Azur, CNRS, INSERM, IRCAN, Nice, France
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Brendan O'Connell
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA, USA
| | - Jerry Jenkins
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, USA
| | - Alexander Brandt
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA
| | | | - Che-Huang Tung
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Tzu-Kai Huang
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | - Jeremy Schmutz
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, USA
| | - Nori Satoh
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Jr-Kai Yu
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
| | | | - Richard E Green
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA, USA
| | - Daniel S Rokhsar
- Molecular Genetics Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan.
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA.
- Chan Zuckerberg Biohub, San Francisco, CA, USA.
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16
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The sterlet sturgeon genome sequence and the mechanisms of segmental rediploidization. Nat Ecol Evol 2020; 4:841-852. [PMID: 32231327 PMCID: PMC7269910 DOI: 10.1038/s41559-020-1166-x] [Citation(s) in RCA: 126] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 02/27/2020] [Indexed: 12/20/2022]
Abstract
Sturgeons seem to be frozen in time. The archaic characteristics of this ancient fish lineage place it in a key phylogenetic position at the base of the ~30,000 modern teleost fish species. Moreover, sturgeons are notoriously polyploid, providing unique opportunities to investigate the evolution of polyploid genomes. We assembled a high-quality chromosome-level reference genome for the sterlet, Acipenser ruthenus. Our analysis revealed a very low protein evolution rate that is at least as slow as in other deep branches of the vertebrate tree, such as that of the coelacanth. We uncovered a whole-genome duplication that occurred in the Jurassic, early in the evolution of the entire sturgeon lineage. Following this polyploidization, the rediploidization of the genome included the loss of whole chromosomes in a segmental deduplication process. While known adaptive processes helped conserve a high degree of structural and functional tetraploidy over more than 180 million years, the reduction of redundancy of the polyploid genome seems to have been remarkably random. A genome assembly of the sterlet, Acipenser ruthenus, reveals a whole-genome duplication early in the evolution of the entire sturgeon lineage and provides details about the rediploidization of the genome.
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17
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Liu DW, Wang FY, Lin JJ, Thompson A, Lu Y, Vo D, Yan HY, Zakon H. The Cone Opsin Repertoire of Osteoglossomorph Fishes: Gene Loss in Mormyrid Electric Fish and a Long Wavelength-Sensitive Cone Opsin That Survived 3R. Mol Biol Evol 2019; 36:447-457. [PMID: 30590689 DOI: 10.1093/molbev/msy241] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Vertebrates have four classes of cone opsin genes derived from two rounds of genome duplication. These are short wavelength sensitive 1(SWS1), short wavelength sensitive 2(SWS2), medium wavelength sensitive (RH2), and long wavelength sensitive (LWS). Teleosts had another genome duplication at their origin and it is believed that only one of each cone opsin survived the ancestral teleost duplication event. We tested this by examining the retinal cones of a basal teleost group, the osteoglossomorphs. Surprisingly, this lineage has lost the typical vertebrate green-sensitive RH2 opsin gene and, instead, has a duplicate of the LWS opsin that is green sensitive. This parallels the situation in mammalian evolution in which the RH2 opsin gene was lost in basal mammals and a green-sensitive opsin re-evolved in Old World, and independently in some New World, primates from an LWS opsin gene. Another group of fish, the characins, possess green-sensitive LWS cones. Phylogenetic analysis shows that the evolution of green-sensitive LWS opsins in these two teleost groups derives from a common ancestral LWS opsin that acquired green sensitivity. Additionally, the nocturnally active African weakly electric fish (Mormyroideae), which are osteoglossomorphs, show a loss of the SWS1 opsin gene. In comparison with the independently evolved nocturnally active South American weakly electric fish (Gymnotiformes) with a functionally monochromatic LWS opsin cone retina, the presence of SWS2, LWS, and LWS2 cone opsins in mormyrids suggests the possibility of color vision.
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Affiliation(s)
- Da-Wei Liu
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli, Taiwan
| | - Feng-Yu Wang
- Taiwan Ocean Research Institute, National Applied Research Laboratories, Kaohsiung, Taiwan
| | - Jinn-Jy Lin
- Biodiversity Research Center, Academia Sinica, Nankang, Taipei, Taiwan
| | - Ammon Thompson
- Department of Integrative Biology, The University of Texas, Austin, TX
| | - Ying Lu
- Department of Integrative Biology, The University of Texas, Austin, TX.,Department of Neuroscience, The University of Texas, Austin, TX
| | - Derek Vo
- Department of Integrative Biology, The University of Texas, Austin, TX
| | - Hong Young Yan
- National Museum of Marine Biology and Aquarium, Chencheng, Pingtung, Taiwan
| | - Harold Zakon
- Department of Integrative Biology, The University of Texas, Austin, TX.,Department of Neuroscience, The University of Texas, Austin, TX
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18
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De novo European eel transcriptome provides insights into the evolutionary history of duplicated genes in teleost lineages. PLoS One 2019; 14:e0218085. [PMID: 31188893 PMCID: PMC6561569 DOI: 10.1371/journal.pone.0218085] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 05/25/2019] [Indexed: 12/18/2022] Open
Abstract
Paralogues pairs are more frequently observed in eels (Anguilla sp.) than in other teleosts. The paralogues often show low phylogenetic distances; however, they have been assigned to the third round of whole genome duplication (WGD), shared by all teleosts (3R), due to their conserved synteny. The apparent contradiction of low phylogenetic difference and 3R conserved synteny led us to study the duplicated gene complement of the freshwater eels. With this aim, we assembled de novo transcriptomes of two highly relevant freshwater eel species: The European (Anguilla anguilla) and the Japanese eel (Anguilla japonica). The duplicated gene complement was analysed in these transcriptomes, and in the genomes and transcriptomes of other Actinopterygii species. The study included an assessment of neutral genetic divergence (4dTv), synteny, and the phylogenetic origins and relationships of the duplicated gene complements. The analyses indicated a high accumulation of duplications (1217 paralogue pairs) among freshwater eel genes, which may have originated in a WGD event after the Elopomorpha lineage diverged from the remaining teleosts, and thus not at the 3R. However, very similar results were observed in the basal Osteoglossomorpha and Clupeocephala branches, indicating that the specific genomic regions of these paralogues may still have been under tetrasomic inheritance at the split of the teleost lineages. Therefore, two potential hypotheses may explain the results: i) The freshwater eel lineage experienced an additional WGD to 3R, and ii) Some duplicated genomic regions experienced lineage specific rediploidization after 3R in the ancestor to freshwater eels. The supporting/opposing evidence for both hypotheses is discussed.
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19
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Houston RD, Macqueen DJ. Atlantic salmon (Salmo salar L.) genetics in the 21st century: taking leaps forward in aquaculture and biological understanding. Anim Genet 2019; 50:3-14. [PMID: 30426521 PMCID: PMC6492011 DOI: 10.1111/age.12748] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/15/2018] [Indexed: 12/17/2022]
Abstract
Atlantic salmon (Salmo salar L.) is among the most iconic and economically important fish species and was the first member of Salmonidae to have a high-quality reference genome assembly published. Advances in genomics have become increasingly central to the genetic improvement of farmed Atlantic salmon as well as conservation of wild salmon stocks. The salmon genome has also been pivotal in shaping our understanding of the evolutionary and functional consequences arising from an ancestral whole-genome duplication event characterising all Salmonidae members. Here, we provide a review of the current status of Atlantic salmon genetics and genomics, focussed on progress made from genome-wide research aimed at improving aquaculture production and enhancing understanding of salmonid ecology, physiology and evolution. We present our views on the future direction of salmon genomics, including the role of emerging technologies (e.g. genome editing) in elucidating genetic features that underpin functional variation in traits of commercial and evolutionary importance.
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Affiliation(s)
- R. D. Houston
- The Roslin Institute and Royal (Dick) School of Veterinary StudiesThe University of EdinburghMidlothianEH25 9RGUK
| | - D. J. Macqueen
- School of Biological SciencesUniversity of AberdeenAberdeenAB24 2TZUK
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20
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Kavouras M, Malandrakis EE, Golomazou E, Konstantinidis I, Blom E, Palstra AP, Anastassiadis K, Panagiotaki P, Exadactylos A. Hox gene expression profiles during embryonic development of common sole. ANIM BIOL 2019. [DOI: 10.1163/15707563-17000123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Common sole (Solea solea) aquaculture production is based mostly on wild-caught breeders. Recently, the successful reproduction of first-generation fish that were reared in captivity was accomplished. A consistent good quality and quantity of produced eggs throughout the year, and of next-generation broodstock, is important for reducing the overall cost of production. Hox genes play a pivotal role in normal embryonic development and alterations of their temporal expression level may be important for egg viability. Expression profile analysis of five hox genes (hoxa1a, hoxa2a, hoxa2b, hoxb1a and hoxb1b) involved in early embryonic development and of hoxa13a, which is involved in late stages, was carried out. Results revealed a premature and/or maternal expression of hoxa13a in sole embryos, and the detection of hoxa2a and hoxa2b genes as members of paralog group 2. Principal Component Analysis of hox gene expression in 54 ± 6 hours post fertilization embryos coming from wild-caught broodstock and a first-generation one reared in the hatchery, unveiled that these broodstocks are clearly distinct. In addition, their pairwise comparison revealed significant differences in the expression levels of hoxb1a and hoxb1b genes. Hox gene regulation during embryonic development could give valuable insight into rearing sole broodstocks with different origin in concert, and also into gaining a steady mass production of eggs, either in quality or quantity, all year round.
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Affiliation(s)
- Menelaos Kavouras
- 1Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., Volos, Greece
| | - Emmanouil E. Malandrakis
- 1Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., Volos, Greece
| | - Eleni Golomazou
- 1Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., Volos, Greece
| | - Ioannis Konstantinidis
- 1Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., Volos, Greece
| | - Ewout Blom
- 2Wageningen Marine Research, Wageningen University & Research, IJmuiden, The Netherlands
| | - Arjan P. Palstra
- 3Wageningen University & Research, Animal Breeding and Genomics, Wageningen Livestock Research, Wageningen, The Netherlands
| | | | - Panagiota Panagiotaki
- 1Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., Volos, Greece
| | - Athanasios Exadactylos
- 1Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., Volos, Greece
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21
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Clark JW, Donoghue PCJ. Whole-Genome Duplication and Plant Macroevolution. TRENDS IN PLANT SCIENCE 2018; 23:933-945. [PMID: 30122372 DOI: 10.1016/j.tplants.2018.07.006] [Citation(s) in RCA: 166] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 06/29/2018] [Accepted: 07/12/2018] [Indexed: 05/18/2023]
Abstract
Whole-genome duplication (WGD) is characteristic of almost all fundamental lineages of land plants. Unfortunately, the timings of WGD events are loosely constrained and hypotheses of evolutionary consequence are poorly formulated, making them difficult to test. Using examples from across the plant kingdom, we show that estimates of timing can be improved through the application of molecular clock methodology to multigene datasets. Further, we show that phenotypic change can be quantified in morphospaces and that relative phenotypic disparity can be compared in the light of WGD. Together, these approaches facilitate tests of hypotheses on the role of WGD in plant evolution, underscoring the potential of plants as a model system for investigating the role WGD in macroevolution.
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Affiliation(s)
- James W Clark
- School of Earth Sciences, University of Bristol, Life Sciences Building, Bristol BS8 1TH, UK.
| | - Philip C J Donoghue
- School of Earth Sciences, University of Bristol, Life Sciences Building, Bristol BS8 1TH, UK.
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22
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Pascual-Anaya J, Sato I, Sugahara F, Higuchi S, Paps J, Ren Y, Takagi W, Ruiz-Villalba A, Ota KG, Wang W, Kuratani S. Hagfish and lamprey Hox genes reveal conservation of temporal colinearity in vertebrates. Nat Ecol Evol 2018; 2:859-866. [PMID: 29610468 DOI: 10.1038/s41559-018-0526-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 03/01/2018] [Indexed: 11/09/2022]
Abstract
Hox genes exert fundamental roles for proper regional specification along the main rostro-caudal axis of animal embryos. They are generally expressed in restricted spatial domains according to their position in the cluster (spatial colinearity)-a feature that is conserved across bilaterians. In jawed vertebrates (gnathostomes), the position in the cluster also determines the onset of expression of Hox genes (a feature known as whole-cluster temporal colinearity (WTC)), while in invertebrates this phenomenon is displayed as a subcluster-level temporal colinearity. However, little is known about the expression profile of Hox genes in jawless vertebrates (cyclostomes); therefore, the evolutionary origin of WTC, as seen in gnathostomes, remains a mystery. Here, we show that Hox genes in cyclostomes are expressed according to WTC during development. We investigated the Hox repertoire and Hox gene expression profiles in three different species-a hagfish, a lamprey and a shark-encompassing the two major groups of vertebrates, and found that these are expressed following a whole-cluster, temporally staggered pattern, indicating that WTC has been conserved during the past 500 million years despite drastically different genome evolution and morphological outputs between jawless and jawed vertebrates.
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Affiliation(s)
| | - Iori Sato
- Evolutionary Morphology Laboratory, RIKEN, Kobe, Japan.,Evolutionary Morphology Research Team, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Japan
| | - Fumiaki Sugahara
- Evolutionary Morphology Laboratory, RIKEN, Kobe, Japan.,Division of Biology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Shinnosuke Higuchi
- Evolutionary Morphology Laboratory, RIKEN, Kobe, Japan.,Evolutionary Morphology Research Team, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Japan
| | - Jordi Paps
- School of Biological Sciences, University of Essex, Colchester, UK
| | - Yandong Ren
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Wataru Takagi
- Evolutionary Morphology Laboratory, RIKEN, Kobe, Japan.,Physiology Laboratory, Atmosphere Ocean Research Institute, The University of Tokyo, Chiba, Japan
| | - Adrián Ruiz-Villalba
- Centro de Investigación Médica Aplicada (CIMA), Área de Terapia Celular, Universidad de Navarra, Pamplona, Spain.,Instituto de Salud Pública de Navarra, IdiSNA, Pamplona, Spain
| | - Kinya G Ota
- Laboratory of Aquatic Zoology, Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Yilan, Taiwan
| | - Wen Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Shigeru Kuratani
- Evolutionary Morphology Laboratory, RIKEN, Kobe, Japan.,Evolutionary Morphology Research Team, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe, Japan
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23
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Gallagher MD, Macqueen DJ. Evolution and Expression of Tissue Globins in Ray-Finned Fishes. Genome Biol Evol 2018; 9:32-47. [PMID: 28173090 PMCID: PMC5381549 DOI: 10.1093/gbe/evw266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2016] [Indexed: 12/30/2022] Open
Abstract
The globin gene family encodes oxygen-binding hemeproteins conserved across the major branches of multicellular life. The origins and evolutionary histories of complete globin repertoires have been established for many vertebrates, but there remain major knowledge gaps for ray-finned fish. Therefore, we used phylogenetic, comparative genomic and gene expression analyses to discover and characterize canonical “non-blood” globin family members (i.e., myoglobin, cytoglobin, neuroglobin, globin-X, and globin-Y) across multiple ray-finned fish lineages, revealing novel gene duplicates (paralogs) conserved from whole genome duplication (WGD) and small-scale duplication events. Our key findings were that: (1) globin-X paralogs in teleosts have been retained from the teleost-specific WGD, (2) functional paralogs of cytoglobin, neuroglobin, and globin-X, but not myoglobin, have been conserved from the salmonid-specific WGD, (3) triplicate lineage-specific myoglobin paralogs are conserved in arowanas (Osteoglossiformes), which arose by tandem duplication and diverged under positive selection, (4) globin-Y is retained in multiple early branching fish lineages that diverged before teleosts, and (5) marked variation in tissue-specific expression of globin gene repertoires exists across ray-finned fish evolution, including several previously uncharacterized sites of expression. In this respect, our data provide an interesting link between myoglobin expression and the evolution of air breathing in teleosts. Together, our findings demonstrate great-unrecognized diversity in the repertoire and expression of nonblood globins that has arisen during ray-finned fish evolution.
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Affiliation(s)
- Michael D Gallagher
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Daniel J Macqueen
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, United Kingdom
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24
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MacKintosh C, Ferrier DEK. Recent advances in understanding the roles of whole genome duplications in evolution. F1000Res 2017; 6:1623. [PMID: 28928963 PMCID: PMC5590085 DOI: 10.12688/f1000research.11792.2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/23/2018] [Indexed: 01/21/2023] Open
Abstract
Ancient whole-genome duplications (WGDs)- paleopolyploidy events-are key to solving Darwin's 'abominable mystery' of how flowering plants evolved and radiated into a rich variety of species. The vertebrates also emerged from their invertebrate ancestors via two WGDs, and genomes of diverse gymnosperm trees, unicellular eukaryotes, invertebrates, fishes, amphibians and even a rodent carry evidence of lineage-specific WGDs. Modern polyploidy is common in eukaryotes, and it can be induced, enabling mechanisms and short-term cost-benefit assessments of polyploidy to be studied experimentally. However, the ancient WGDs can be reconstructed only by comparative genomics: these studies are difficult because the DNA duplicates have been through tens or hundreds of millions of years of gene losses, mutations, and chromosomal rearrangements that culminate in resolution of the polyploid genomes back into diploid ones (rediploidisation). Intriguing asymmetries in patterns of post-WGD gene loss and retention between duplicated sets of chromosomes have been discovered recently, and elaborations of signal transduction systems are lasting legacies from several WGDs. The data imply that simpler signalling pathways in the pre-WGD ancestors were converted via WGDs into multi-stranded parallelised networks. Genetic and biochemical studies in plants, yeasts and vertebrates suggest a paradigm in which different combinations of sister paralogues in the post-WGD regulatory networks are co-regulated under different conditions. In principle, such networks can respond to a wide array of environmental, sensory and hormonal stimuli and integrate them to generate phenotypic variety in cell types and behaviours. Patterns are also being discerned in how the post-WGD signalling networks are reconfigured in human cancers and neurological conditions. It is fascinating to unpick how ancient genomic events impact on complexity, variety and disease in modern life.
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Affiliation(s)
- Carol MacKintosh
- Division of Cell and Developmental Biology, University of Dundee, Dundee, Scotland, DD1 5EH, UK
| | - David E K Ferrier
- The Scottish Oceans Institute, University of St Andrews, Scotland, KY16 8LB, UK
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25
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Robertson FM, Gundappa MK, Grammes F, Hvidsten TR, Redmond AK, Lien S, Martin SAM, Holland PWH, Sandve SR, Macqueen DJ. Lineage-specific rediploidization is a mechanism to explain time-lags between genome duplication and evolutionary diversification. Genome Biol 2017; 18:111. [PMID: 28615063 PMCID: PMC5470254 DOI: 10.1186/s13059-017-1241-z] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 05/19/2017] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The functional divergence of duplicate genes (ohnologues) retained from whole genome duplication (WGD) is thought to promote evolutionary diversification. However, species radiation and phenotypic diversification are often temporally separated from WGD. Salmonid fish, whose ancestor underwent WGD by autotetraploidization ~95 million years ago, fit such a 'time-lag' model of post-WGD radiation, which occurred alongside a major delay in the rediploidization process. Here we propose a model, 'lineage-specific ohnologue resolution' (LORe), to address the consequences of delayed rediploidization. Under LORe, speciation precedes rediploidization, allowing independent ohnologue divergence in sister lineages sharing an ancestral WGD event. RESULTS Using cross-species sequence capture, phylogenomics and genome-wide analyses of ohnologue expression divergence, we demonstrate the major impact of LORe on salmonid evolution. One-quarter of each salmonid genome, harbouring at least 4550 ohnologues, has evolved under LORe, with rediploidization and functional divergence occurring on multiple independent occasions >50 million years post-WGD. We demonstrate the existence and regulatory divergence of many LORe ohnologues with functions in lineage-specific physiological adaptations that potentially facilitated salmonid species radiation. We show that LORe ohnologues are enriched for different functions than 'older' ohnologues that began diverging in the salmonid ancestor. CONCLUSIONS LORe has unappreciated significance as a nested component of post-WGD divergence that impacts the functional properties of genes, whilst providing ohnologues available solely for lineage-specific adaptation. Under LORe, which is predicted following many WGD events, the functional outcomes of WGD need not appear 'explosively', but can arise gradually over tens of millions of years, promoting lineage-specific diversification regimes under prevailing ecological pressures.
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Affiliation(s)
- Fiona M Robertson
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Manu Kumar Gundappa
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Fabian Grammes
- Centre for Integrative Genetics (CIGENE), Faculty of Biosciences, Norwegian University of Life Sciences, Ås, NO-1432, Norway
| | - Torgeir R Hvidsten
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, 1432, Ås, Norway.,Umeå Plant Science Centre, Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, SE-90187, Umeå, Sweden
| | - Anthony K Redmond
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.,Centre for Genome-Enabled Biology & Medicine, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Sigbjørn Lien
- Centre for Integrative Genetics (CIGENE), Faculty of Biosciences, Norwegian University of Life Sciences, Ås, NO-1432, Norway
| | - Samuel A M Martin
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Peter W H Holland
- Department of Zoology, University of Oxford, South Parks Road, Oxford, OX1 3PS, UK
| | - Simen R Sandve
- Centre for Integrative Genetics (CIGENE), Faculty of Biosciences, Norwegian University of Life Sciences, Ås, NO-1432, Norway
| | - Daniel J Macqueen
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.
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26
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Complex Genes Are Preferentially Retained After Whole-Genome Duplication in Teleost Fish. J Mol Evol 2017; 84:253-258. [PMID: 28492966 DOI: 10.1007/s00239-017-9794-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/03/2017] [Indexed: 11/27/2022]
Abstract
Gene duplication generates new genetic material which, if retained after duplication, may contribute to organismal evolution. A whole-genome duplication occurred in the ancestry of teleost fish and consequently there are many duplicated genes in teleost genomes. Indeed, it has been proposed that the evolutionary diversification of teleost fish may have been stimulated by the fish-specific genome duplication (FSGD). However, it is not clear which factors determine which genes are retained as duplicate copies and which return to a singleton state after duplication. In the present study, gene complexity, in terms of encoded protein length and functional domain number, is compared between duplicate and singleton genes for nine well-annotated teleost genomes. A total of 933 gene families with retained duplicates and 4590 singleton gene families are analysed. Genes with retained duplicates are found to be significantly longer (27.9-38.2%) and to have more functional domains (20.5-26.5%) than singleton genes in all the nine teleost genomes, suggesting that genes encoded longer proteins with and more functional domains were preferentially retained after whole-genome duplication in teleosts. This differential retention of duplicated genes will have increased the genomic complexity of teleost fish after FSGD which, together with differential duplicated gene retention as a lineage-splitting force, may have greatly contributed to the successful diversification of teleost fish.
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27
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Martin KJ, Holland PWH. Diversification of Hox Gene Clusters in Osteoglossomorph Fish in Comparison to Other Teleosts and the Spotted Gar Outgroup. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2017; 328:638-644. [DOI: 10.1002/jez.b.22726] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/14/2016] [Accepted: 12/25/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Kyle J Martin
- Department of Zoology; University of Oxford; Oxford UK
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
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28
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The Asian arowana (Scleropages formosus) genome provides new insights into the evolution of an early lineage of teleosts. Sci Rep 2016; 6:24501. [PMID: 27089831 PMCID: PMC4835728 DOI: 10.1038/srep24501] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 03/30/2016] [Indexed: 11/09/2022] Open
Abstract
The Asian arowana (Scleropages formosus), one of the world's most expensive cultivated ornamental fishes, is an endangered species. It represents an ancient lineage of teleosts: the Osteoglossomorpha. Here, we provide a high-quality chromosome-level reference genome of a female golden-variety arowana using a combination of deep shotgun sequencing and high-resolution linkage mapping. In addition, we have also generated two draft genome assemblies for the red and green varieties. Phylogenomic analysis supports a sister group relationship between Osteoglossomorpha (bonytongues) and Elopomorpha (eels and relatives), with the two clades together forming a sister group of Clupeocephala which includes all the remaining teleosts. The arowana genome retains the full complement of eight Hox clusters unlike the African butterfly fish (Pantodon buchholzi), another bonytongue fish, which possess only five Hox clusters. Differential gene expression among three varieties provides insights into the genetic basis of colour variation. A potential heterogametic sex chromosome is identified in the female arowana karyotype, suggesting that the sex is determined by a ZW/ZZ sex chromosomal system. The high-quality reference genome of the golden arowana and the draft assemblies of the red and green varieties are valuable resources for understanding the biology, adaptation and behaviour of Asian arowanas.
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29
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Zwarycz AS, Nossa CW, Putnam NH, Ryan JF. Timing and Scope of Genomic Expansion within Annelida: Evidence from Homeoboxes in the Genome of the Earthworm Eisenia fetida. Genome Biol Evol 2016. [DOI: 10.1093/gbe/evv243 v] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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30
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Zwarycz AS, Nossa CW, Putnam NH, Ryan JF. Timing and Scope of Genomic Expansion within Annelida: Evidence from Homeoboxes in the Genome of the Earthworm Eisenia fetida. Genome Biol Evol 2015; 8:271-81. [PMID: 26659921 PMCID: PMC4758240 DOI: 10.1093/gbe/evv243] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2015] [Indexed: 11/14/2022] Open
Abstract
Annelida represents a large and morphologically diverse group of bilaterian organisms. The recently published polychaete and leech genome sequences revealed an equally dynamic range of diversity at the genomic level. The availability of more annelid genomes will allow for the identification of evolutionary genomic events that helped shape the annelid lineage and better understand the diversity within the group. We sequenced and assembled the genome of the common earthworm, Eisenia fetida. As a first pass at understanding the diversity within the group, we classified 363 earthworm homeoboxes and compared them with those of the leech Helobdella robusta and the polychaete Capitella teleta. We inferred many gene expansions occurring in the lineage connecting the most recent common ancestor (MRCA) of Capitella and Eisenia to the Eisenia/Helobdella MRCA. Likewise, the lineage leading from the Eisenia/Helobdella MRCA to the leech H. robusta has experienced substantial gains and losses. However, the lineage leading from Eisenia/Helobdella MRCA to E. fetida is characterized by extraordinary levels of homeobox gain. The evolutionary dynamics observed in the homeoboxes of these lineages are very likely to be generalizable to all genes. These genome expansions and losses have likely contributed to the remarkable biology exhibited in this group. These results provide a new perspective from which to understand the diversity within these lineages, show the utility of sub-draft genome assemblies for understanding genomic evolution, and provide a critical resource from which the biology of these animals can be studied.
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Affiliation(s)
- Allison S Zwarycz
- Whitney Laboratory for Marine Bioscience, University of Florida Viterbo University
| | - Carlos W Nossa
- Department of Ecology and Evolutionary Biology, Rice University
| | | | - Joseph F Ryan
- Whitney Laboratory for Marine Bioscience, University of Florida Department of Biology, University of Florida
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31
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Rapid genome reshaping by multiple-gene loss after whole-genome duplication in teleost fish suggested by mathematical modeling. Proc Natl Acad Sci U S A 2015; 112:14918-23. [PMID: 26578810 DOI: 10.1073/pnas.1507669112] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Whole-genome duplication (WGD) is believed to be a significant source of major evolutionary innovation. Redundant genes resulting from WGD are thought to be lost or acquire new functions. However, the rates of gene loss and thus temporal process of genome reshaping after WGD remain unclear. The WGD shared by all teleost fish, one-half of all jawed vertebrates, was more recent than the two ancient WGDs that occurred before the origin of jawed vertebrates, and thus lends itself to analysis of gene loss and genome reshaping. Using a newly developed orthology identification pipeline, we inferred the post-teleost-specific WGD evolutionary histories of 6,892 protein-coding genes from nine phylogenetically representative teleost genomes on a time-calibrated tree. We found that rapid gene loss did occur in the first 60 My, with a loss of more than 70-80% of duplicated genes, and produced similar genomic gene arrangements within teleosts in that relatively short time. Mathematical modeling suggests that rapid gene loss occurred mainly by events involving simultaneous loss of multiple genes. We found that the subsequent 250 My were characterized by slow and steady loss of individual genes. Our pipeline also identified about 1,100 shared single-copy genes that are inferred to have become singletons before the divergence of clupeocephalan teleosts. Therefore, our comparative genome analysis suggests that rapid gene loss just after the WGD reshaped teleost genomes before the major divergence, and provides a useful set of marker genes for future phylogenetic analysis.
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32
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Bürglin TR, Affolter M. Homeodomain proteins: an update. Chromosoma 2015; 125:497-521. [PMID: 26464018 PMCID: PMC4901127 DOI: 10.1007/s00412-015-0543-8] [Citation(s) in RCA: 256] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 09/20/2015] [Accepted: 09/21/2015] [Indexed: 12/17/2022]
Abstract
Here, we provide an update of our review on homeobox genes that we wrote together with Walter Gehring in 1994. Since then, comprehensive surveys of homeobox genes have become possible due to genome sequencing projects. Using the 103 Drosophila homeobox genes as example, we present an updated classification. In animals, there are 16 major classes, ANTP, PRD, PRD-LIKE, POU, HNF, CUT (with four subclasses: ONECUT, CUX, SATB, and CMP), LIM, ZF, CERS, PROS, SIX/SO, plus the TALE superclass with the classes IRO, MKX, TGIF, PBC, and MEIS. In plants, there are 11 major classes, i.e., HD-ZIP (with four subclasses: I to IV), WOX, NDX, PHD, PLINC, LD, DDT, SAWADEE, PINTOX, and the two TALE classes KNOX and BEL. Most of these classes encode additional domains apart from the homeodomain. Numerous insights have been obtained in the last two decades into how homeodomain proteins bind to DNA and increase their specificity by interacting with other proteins to regulate cell- and tissue-specific gene expression. Not only protein-DNA base pair contacts are important for proper target selection; recent experiments also reveal that the shape of the DNA plays a role in specificity. Using selected examples, we highlight different mechanisms of homeodomain protein-DNA interaction. The PRD class of homeobox genes was of special interest to Walter Gehring in the last two decades. The PRD class comprises six families in Bilateria, and tinkers with four different motifs, i.e., the PAIRED domain, the Groucho-interacting motif EH1 (aka Octapeptide or TN), the homeodomain, and the OAR motif. Homologs of the co-repressor protein Groucho are also present in plants (TOPLESS), where they have been shown to interact with small amphipathic motives (EAR), and in yeast (TUP1), where we find an EH1-like motif in MATα2.
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Affiliation(s)
- Thomas R. Bürglin
- />Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
- />Department of Biomedicine, University of Basel, Mattenstrasse 28, 4058 Basel, Switzerland
| | - Markus Affolter
- />Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
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