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Baker DN, Abueg L, Escalona M, Farquharson KA, Lanyon JM, Le Duc D, Schöneberg T, Absolon D, Sims Y, Fedrigo O, Jarvis ED, Belov K, Hogg CJ, Shapiro B. A chromosome-level genome assembly for the dugong (Dugong dugon). J Hered 2024; 115:212-220. [PMID: 38245832 PMCID: PMC10936554 DOI: 10.1093/jhered/esae003] [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: 11/22/2023] [Accepted: 01/16/2024] [Indexed: 01/22/2024] Open
Abstract
The dugong (Dugong dugon) is a marine mammal widely distributed throughout the Indo-Pacific and the Red Sea, with a Vulnerable conservation status, and little is known about many of the more peripheral populations, some of which are thought to be close to extinction. We present a de novo high-quality genome assembly for the dugong from an individual belonging to the well-monitored Moreton Bay population in Queensland, Australia. Our assembly uses long-read PacBio HiFi sequencing and Omni-C data following the Vertebrate Genome Project pipeline to reach chromosome-level contiguity (24 chromosome-level scaffolds; 3.16 Gbp) and high completeness (97.9% complete BUSCOs). We observed relatively high genome-wide heterozygosity, which likely reflects historical population abundance before the last interglacial period, approximately 125,000 yr ago. Demographic inference suggests that dugong populations began declining as sea levels fell after the last interglacial period, likely a result of population fragmentation and habitat loss due to the exposure of seagrass meadows. We find no evidence for ongoing recent inbreeding in this individual. However, runs of homozygosity indicate some past inbreeding. Our draft genome assembly will enable range-wide assessments of genetic diversity and adaptation, facilitate effective management of dugong populations, and allow comparative genomics analyses including with other sirenians, the oldest marine mammal lineage.
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Affiliation(s)
- Dorothy Nevé Baker
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, United States
| | - Linelle Abueg
- Vertebrate Genome Laboratory, The Rockefeller University, New York, NY, United States
| | - Merly Escalona
- Department of Biomolecular Engineering, University of California Santa Cruz, Santa Cruz, CA, United States
| | - Katherine A Farquharson
- Faculty of Science, School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, NSW, Australia
| | - Janet M Lanyon
- School of Biological Sciences, The University of Queensland, St Lucia, QLD, Australia
| | - Diana Le Duc
- Institute of Human Genetics, University Medical Center Leipzig, Leipzig, Germany
| | - Torsten Schöneberg
- Medical Faculty, Rudolf Schönheimer Institute of Biochemistry, University of Leipzig, Leipzig, Germany
- School of Medicine, University of Global Health Equity, Kigali, Rwanda
| | - Dominic Absolon
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Ying Sims
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | | | - Erich D Jarvis
- Vertebrate Genome Laboratory, The Rockefeller University, New York, NY, United States
- Howard Hughes Medical Institute, Chevy Chase, MD, United States
| | - Katherine Belov
- Faculty of Science, School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, NSW, Australia
| | - Carolyn J Hogg
- Faculty of Science, School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, NSW, Australia
| | - Beth Shapiro
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, United States
- Howard Hughes Medical Institute, Chevy Chase, MD, United States
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Tavares FDS, Martins C, Delella FK, Nascimento LASD, Rodrigues ALF, Moreira S, Cardoso AL, Noronha RCR. Establishment and Characterization of a Primary Fibroblast Cell Culture from the Amazonian Manatee ( Trichechus inunguis). Animals (Basel) 2024; 14:686. [PMID: 38473072 DOI: 10.3390/ani14050686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/02/2024] [Accepted: 01/22/2024] [Indexed: 03/14/2024] Open
Abstract
The vulnerable status of the Amazon manatee, Trichechus inunguis, indicates the need to seek measures to guarantee its conservation. In this context, the cultivation of cells in vitro is a strategy that should at least guarantee the preservation of their genetic material. Thus, we established for the first time a primary culture of Amazonian manatee fibroblasts (TINsf) from a skin biopsy of a young male. Karyotypic analysis of the 3rd, 7th, and 12th passages confirmed the taxonomic identity of the species T. inunguis (2n = 56/NF = 92) and indicated that this culture presents genomic stability. Gene and protein expression of vimentin at the 13th passage show the predominant presence of fibroblasts in TINsf. To test the cell line's responsiveness to materials and demonstrate a possible application of this culture, it was exposed to andiroba seed oil (ASO), and its viability and proliferative capacity were evaluated. ASO demonstrated toxic effects at the highest concentrations and longest exposure times tested, reproducing results observed in human cultures, indicating the applicability of TINsf in toxicological and biotechnological studies. After cryopreservation, the TINsf line maintained its proliferative potential, indicating the establishment of a new culture available for future studies.
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Affiliation(s)
- Flávia Dos Santos Tavares
- Laboratório de Genética e Biologia Celular, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém 66075-110, PA, Brazil
| | - Cesar Martins
- Department of Structural and Functional Biology, Institute of Biosciences at Botucatu, Sao Paulo State University-UNESP, Botucatu 18618-689, SP, Brazil
| | - Flávia Karina Delella
- Department of Structural and Functional Biology, Institute of Biosciences at Botucatu, Sao Paulo State University-UNESP, Botucatu 18618-689, SP, Brazil
| | | | | | - Sávia Moreira
- Instituto Biologia e Conservação dos Mamíferos Aquáticos da Amazônia (BioMA), Belém 66077-830, PA, Brazil
| | - Adauto Lima Cardoso
- Laboratório de Genética e Biologia Celular, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém 66075-110, PA, Brazil
- Department of Structural and Functional Biology, Institute of Biosciences at Botucatu, Sao Paulo State University-UNESP, Botucatu 18618-689, SP, Brazil
- Laboratório de Óleos da Amazônia, Universidade Federal do Pará, Belém 66075-110, PA, Brazil
| | - Renata Coelho Rodrigues Noronha
- Laboratório de Genética e Biologia Celular, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém 66075-110, PA, Brazil
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Machado CRD, Azambuja M, Domit C, da Fonseca GF, Glugoski L, Gazolla CB, de Almeida RB, Pucci MB, Pires TT, Nogaroto V, Vicari MR. Integrating morphological, molecular and cytogenetic data for F2 sea turtle hybrids diagnosis revealed balanced chromosomal sets. J Evol Biol 2023; 36:1595-1608. [PMID: 37885128 DOI: 10.1111/jeb.14236] [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: 03/06/2023] [Revised: 06/19/2023] [Accepted: 07/10/2023] [Indexed: 10/28/2023]
Abstract
Hybridization could be considered part of the evolutionary history of many species. The hybridization among sea turtle species on the Brazilian coast is atypical and occurs where nesting areas and reproductive seasons overlap. Integrated analysis of morphology and genetics is still scarce, and there is no evidence of the parental chromosome set distribution in sea turtle interspecific hybrids. In this study, chromosome markers previously established for pure sea turtle species were combined with morphological and molecular analyses aiming to recognize genetic composition and chromosome sets in possible interspecific hybrids initially identified by mixed morphology. The data showed that one hybrid could be an F2 individual among Caretta caretta × Eretmochelys imbricata × Chelonia mydas, and another is resulting from backcross between C. caretta × Lepidochelys olivacea. Native alleles of different parental lineages were reported in the hybrids, and, despite this, it was verified that the hybrid chromosome sets were still balanced. Thus, how sea turtle hybridism can affect genetic features in the long term is a concern, as the implications of the crossing-over in hybrid chromosomal sets and the effects on genetic function are still unpredictable.
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Affiliation(s)
- Caroline Regina Dias Machado
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade Federal do Paraná, Centro Politécnico, Curitiba, Paraná, Brazil
| | - Matheus Azambuja
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade Federal do Paraná, Centro Politécnico, Curitiba, Paraná, Brazil
| | - Camila Domit
- Laboratório de Ecologia e Conservação, Universidade Federal do Paraná, Pontal do Paraná, Paraná, Brazil
| | - Gabriel Fraga da Fonseca
- Laboratório de Ecologia e Conservação, Universidade Federal do Paraná, Pontal do Paraná, Paraná, Brazil
| | - Larissa Glugoski
- Programa de Pós-Graduação em Genética Evolutiva e Biologia Molecular, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Camilla Borges Gazolla
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade Federal do Paraná, Centro Politécnico, Curitiba, Paraná, Brazil
| | - Rafael Bonfim de Almeida
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade Federal do Paraná, Centro Politécnico, Curitiba, Paraná, Brazil
| | - Marcela Baer Pucci
- Programa de Pós-Graduação em Genética Evolutiva e Biologia Molecular, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | | | - Viviane Nogaroto
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Marcelo Ricardo Vicari
- Programa de Pós-Graduação em Genética, Departamento de Genética, Universidade Federal do Paraná, Centro Politécnico, Curitiba, Paraná, Brazil
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brazil
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Tavares FDS, Oliveira da Silva W, Ferguson-Smith MA, Klautau AGCDM, Oliveira JM, Rodrigues ALF, Melo-Santos G, Pieczarka JC, Nagamachi CY, Noronha RCR. Ancestral chromosomal signatures of Paenungulata (Afroteria) reveal the karyotype of Amazonian manatee (Trichechus inunguis, Sirenia: Trichechidae) as the oldest among American manatees. BMC Genomics 2023; 24:38. [PMID: 36694120 PMCID: PMC9872332 DOI: 10.1186/s12864-023-09129-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 01/11/2023] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Chromosomal painting in manatees has clarified questions about the rapid evolution of sirenians within the Paenungulata clade. Further cytogenetic studies in Afrotherian species may provide information about their evolutionary dynamics, revealing important insights into the ancestral karyotype in the clade representatives. The karyotype of Trichechus inunguis (TIN, Amazonian manatee) was investigated by chromosome painting, using probes from Trichechus manatus latirostris (TML, Florida manatee) to analyze the homeologies between these sirenians. RESULTS A high similarity was found between these species, with 31 homologous segments in TIN, nineteen of which are whole autosomes, besides the X and Y sex chromosomes. Four chromosomes from TML (4, 6, 8, and 9) resulted in two hybridization signals, totaling eight acrocentrics in the TIN karyotype. This study confirmed in TIN the chromosomal associations of Homo sapiens (HSA) shared in Afrotheria, such as the 5/21 synteny, and in the Paenungulata clade with the syntenies HSA 2/3, 8/22, and 18/19, in addition to the absence of HSA 4/8 common in eutherian ancestral karyotype (EAK). CONCLUSIONS TIN shares more conserved chromosomal signals with the Paenungulata Ancestral Karyotype (APK, 2n = 58) than Procavia capensis (Hyracoidea), Loxodonta africana (Proboscidea) and TML (Sirenia), where TML presents less conserved signals with APK, demonstrating that its karyotype is the most derived among the representatives of Paenungulata. The chromosomal changes that evolved from APK to the T. manatus and T. inunguis karyotypes (7 and 4 changes, respectively) are more substantial within the Trichechus genus compared to other paenungulates. Among these species, T. inunguis presents conserved traits of APK in the American manatee genus. Consequently, the karyotype of T. manatus is more derived than that of T. inunguis.
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Affiliation(s)
- Flávia Dos Santos Tavares
- Laboratório de Citogenética, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal Do Pará (UFPA), Pará, Belém, Brazil
| | - Willam Oliveira da Silva
- Laboratório de Citogenética, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal Do Pará (UFPA), Pará, Belém, Brazil
| | - Malcolm Andrew Ferguson-Smith
- Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | | | - Jairo Moura Oliveira
- Zoological Park of Santarém - Universidade da Amazônia (ZOOUNAMA), Pará, Santarém, Brazil
| | - Angélica Lúcia Figueiredo Rodrigues
- Instituto de Biologia e Conservação de Mamíferos Aquáticos da Amazônia, Universidade Federal Rural da Amazônia (UFRA), Pará, Belém, Brazil
- Secretaria de Educação Do Estado Do Pará (SEDUC-PA), Belém, Brazil
| | - Gabriel Melo-Santos
- Instituto de Biologia e Conservação de Mamíferos Aquáticos da Amazônia, Universidade Federal Rural da Amazônia (UFRA), Pará, Belém, Brazil
- Laboratório de Ecologia Marinha e Conservação, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
- Laboratório de Ecologia de Aves e Comportamento Animal, Universidade Estadual do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Julio Cesar Pieczarka
- Laboratório de Citogenética, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal Do Pará (UFPA), Pará, Belém, Brazil
| | - Cleusa Yoshiko Nagamachi
- Laboratório de Citogenética, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal Do Pará (UFPA), Pará, Belém, Brazil
| | - Renata Coelho Rodrigues Noronha
- Laboratório de Citogenética, Centro de Estudos Avançados da Biodiversidade, Instituto de Ciências Biológicas, Universidade Federal Do Pará (UFPA), Pará, Belém, Brazil.
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