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Holland OJ, Toomey M, Ahrens C, Hoffmann AA, Croft LJ, Sherman CDH, Miller AD. Whole genome resequencing reveals signatures of rapid selection in a virus-affected commercial fishery. Mol Ecol 2022; 31:3658-3671. [PMID: 35555938 PMCID: PMC9327721 DOI: 10.1111/mec.16499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 04/11/2022] [Accepted: 05/04/2022] [Indexed: 11/28/2022]
Abstract
Infectious diseases are recognized as one of the greatest global threats to biodiversity and ecosystem functioning. Consequently, there is a growing urgency to understand the speed at which adaptive phenotypes can evolve and spread in natural populations to inform future management. Here we provide evidence of rapid genomic changes in wild Australian blacklip abalone (Haliotis rubra) following a major population crash associated with an infectious disease. Genome scans on H. rubra were performed using pooled whole genome resequencing data from commercial fishing stocks varying in historical exposure to haliotid herpesvirus-1 (HaHV-1). Approximately 25,000 single nucleotide polymorphism loci associated with virus exposure were identified, many of which mapped to genes known to contribute to HaHV-1 immunity in the New Zealand pāua (Haliotis iris) and herpesvirus response pathways in haliotids and other animal systems. These findings indicate genetic changes across a single generation in H. rubra fishing stocks decimated by HaHV-1, with stock recovery potentially determined by rapid evolutionary changes leading to virus resistance. This is a novel example of apparently rapid adaptation in natural populations of a nonmodel marine organism, highlighting the pace at which selection can potentially act to counter disease in wildlife communities.
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Affiliation(s)
- Owen J. Holland
- School of Life and Environmental SciencesDeakin UniversityWarrnamboolVictoriaAustralia
- Deakin Genomics CentreDeakin UniversityGeelongVictoriaAustralia
| | - Madeline Toomey
- School of Life and Environmental SciencesDeakin UniversityWarrnamboolVictoriaAustralia
- Deakin Genomics CentreDeakin UniversityGeelongVictoriaAustralia
| | - Collin Ahrens
- School of Biotechnology and Biomolecular SciencesUniversity of New South WalesSydneyAustralia
- Research Centre for Ecosystem ResilienceAustralian Institute of Botanical ScienceRoyal Botanic GardenSydneyNew South WalesAustralia
| | - Ary A. Hoffmann
- School of BioSciencesBio21 InstituteThe University of MelbourneParkvilleVictoriaAustralia
| | - Laurence J. Croft
- School of Life and Environmental SciencesDeakin UniversityWarrnamboolVictoriaAustralia
- Deakin Genomics CentreDeakin UniversityGeelongVictoriaAustralia
| | - Craig D. H. Sherman
- School of Life and Environmental SciencesDeakin UniversityWarrnamboolVictoriaAustralia
| | - Adam D. Miller
- School of Life and Environmental SciencesDeakin UniversityWarrnamboolVictoriaAustralia
- Deakin Genomics CentreDeakin UniversityGeelongVictoriaAustralia
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Chauvaud P, Day R, Roussel S. No evident effect of domestication on the anti-predator behaviour of European abalone (Haliotis tuberculata): Implications for stock enhancement programs. Appl Anim Behav Sci 2021. [DOI: 10.1016/j.applanim.2021.105470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Rosani U, Abbadi M, Green T, Bai CM, Turolla E, Arcangeli G, Wegner KM, Venier P. Parallel analysis of miRNAs and mRNAs suggests distinct regulatory networks in Crassostrea gigas infected by Ostreid herpesvirus 1. BMC Genomics 2020; 21:620. [PMID: 32912133 PMCID: PMC7488030 DOI: 10.1186/s12864-020-07026-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 08/25/2020] [Indexed: 12/17/2022] Open
Abstract
Background Since 2008, the aquaculture production of Crassostrea gigas was heavily affected by mass mortalities associated to Ostreid herpesvirus 1 (OsHV-1) microvariants worldwide. Transcriptomic studies revealed the major antiviral pathways of the oyster immune response while other findings suggested that also small non-coding RNAs (sncRNA) such as microRNAs might act as key regulators of the oyster response against OsHV-1. To explore the explicit connection between small non-coding and protein-coding transcripts, we performed paired whole transcriptome analysis of sncRNA and messenger RNA (mRNA) in six oysters selected for different intensities of OsHV-1 infection. Results The mRNA profiles of the naturally infected oysters were mostly governed by the transcriptional activity of OsHV-1, with several differentially expressed genes mapping to the interferon, toll, apoptosis, and pro-PO pathways. In contrast, miRNA profiles suggested more complex regulatory mechanisms, with 15 differentially expressed miRNAs (DE-miRNA) pointing to a possible modulation of the host response during OsHV-1 infection. We predicted 68 interactions between DE-miRNAs and oyster 3′-UTRs, but only few of them involved antiviral genes. The sncRNA reads assigned to OsHV-1 rather resembled mRNA degradation products, suggesting the absence of genuine viral miRNAs. Conclusions We provided data describing the miRNAome during OsHV-1 infection in C. gigas. This information can be used to understand the role of miRNAs in healthy and diseased oysters, to identify new targets for functional studies and, eventually to disentangle cause and effect relationships during viral infections in marine mollusks.
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Affiliation(s)
- Umberto Rosani
- Department of Biology, University of Padova, 35121, Padova, Italy. .,Coastal Ecology Section, AWI - Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Wadden Sea Station Sylt, 25992, List, Germany.
| | - Miriam Abbadi
- Istituto Zooprofilattico delle Venezie, Legnaro, Italy
| | - Timothy Green
- Centre for Shellfish Research & Department of Fisheries and Aquaculture, Vancouver Island University, Nanaimo, BC, V9R 5S5, Canada
| | - Chang-Ming Bai
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | | | | | - K Mathias Wegner
- Coastal Ecology Section, AWI - Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Wadden Sea Station Sylt, 25992, List, Germany
| | - Paola Venier
- Department of Biology, University of Padova, 35121, Padova, Italy.
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4
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Abalone Viral Ganglioneuritis. Pathogens 2020; 9:pathogens9090720. [PMID: 32882932 PMCID: PMC7558354 DOI: 10.3390/pathogens9090720] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/23/2020] [Accepted: 08/29/2020] [Indexed: 11/17/2022] Open
Abstract
Abalone viral ganglioneuritis (AVG), caused by Haliotid herpesvirus-1 (HaHV-1; previously called abalone herpesvirus), is a disease that has been responsible for extensive mortalities in wild and farmed abalone and has caused significant economic losses in Asia and Australia since outbreaks occurred in the early 2000s. Researchers from Taiwan, China, and Australia have conducted numerous studies encompassing HaHV-1 genome sequencing, development of molecular diagnostic tests, and evaluation of the susceptibility of various abalone species to AVG as well as studies of gene expression in abalone upon virus infection. This review presents a timeline of the most significant research findings on AVG and HaHV-1 as well as potential future research avenues to further understand this disease in order to develop better management strategies.
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5
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Immune Control of Herpesvirus Infection in Molluscs. Pathogens 2020; 9:pathogens9080618. [PMID: 32751093 PMCID: PMC7460283 DOI: 10.3390/pathogens9080618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/20/2020] [Accepted: 07/28/2020] [Indexed: 12/24/2022] Open
Abstract
Molluscan herpesviruses that are capable of infecting economically important species of abalone and oysters have caused significant losses in production due to the high mortality rate of infected animals. Current methods in preventing and controlling herpesviruses in the aquacultural industry are based around biosecurity measures which are impractical and do not contain the virus as farms source their water from oceans. Due to the lack of an adaptive immune system in molluscs, vaccine related therapies are not a viable option; therefore, a novel preventative strategy known as immune priming was recently explored. Immune priming has been shown to provide direct protection in oysters from Ostreid herpesvirus-1, as well as to their progeny through trans-generational immune priming. The mechanisms of these processes are not completely understood, however advancements in the characterisation of the oyster immune response has assisted in formulating potential hypotheses. Limited literature has explored the immune response of abalone infected with Haliotid herpesvirus as well as the potential for immune priming in these species, therefore, more research is required in this area to determine whether this is a practical solution for control of molluscan herpesviruses in an aquaculture setting.
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6
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Bai CM, Li YN, Chang PH, Jiang JZ, Xin LS, Li C, Wang JY, Wang CM. In situ hybridization revealed wide distribution of Haliotid herpesvirus 1 in infected small abalone, Haliotis diversicolor supertexta. J Invertebr Pathol 2020; 173:107356. [PMID: 32199833 DOI: 10.1016/j.jip.2020.107356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 11/19/2022]
Abstract
Ganglioneuritis was the primary pathologic change in infected abalone associated with Haliotid herpesvirus 1 (HaHV-1) infection, which eventually became known as abalone viral ganglioneuritis (AVG). However, the distribution of HaHV-1 in the other tissues and organs of infected abalone has not been systemically investigated. In the present study, the distribution of HaHV-1-CN2003 variant in different organs of small abalone, Haliotis diversicolor supertexta, collected at seven different time points post experimental infection, was investigated with histopathological examination and in situ hybridization (ISH) of HaHV-1 DNA. ISH signals were first observed in pedal ganglia at 48 h post injection, and were consistently observed in this tissue of challenged abalone. At the same time, increased cellularity accompanied by ISH signals was observed in some peripheral ganglia of mantle and kidney. At the end of infection period, lesions and co-localized ISH signals in infiltrated cells were detected occasionally in the mantle and hepatopancreas. Transmission electron microscope analysis revealed the presence of herpes-like viral particles in haemocyte nuclei of infected abalone. Our results indicated that, although HaHV-1-CN2003 was primarily neurotropic, it could infect other tissues including haemocytes.
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Affiliation(s)
- Chang-Ming Bai
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture; Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
| | - Ya-Nan Li
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture; Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Pen-Heng Chang
- Institute of Comparative and Molecular Pathobiology, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
| | - Jing-Zhe Jiang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
| | - Lu-Sheng Xin
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture; Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
| | - Chen Li
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture; Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
| | - Jiang-Yong Wang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
| | - Chong-Ming Wang
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture; Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China.
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7
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Neave MJ, Corbeil S, McColl KA, Crane MSJ. Investigating the natural resistance of blackfoot p-a%%KERN_ERR%%ua Haliotis iris to abalone viral ganglioneuritis using whole transcriptome analysis. DISEASES OF AQUATIC ORGANISMS 2019; 135:107-119. [PMID: 31342912 DOI: 10.3354/dao03390] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The natural resistance of New Zealand blackfoot p-a%%%%%%%%%%%%%%KERN_ERR%%KERN_ERR%%KERN_ERR%%KERN_ERR%%KERN_ERR%%KERN_ERR%%KERN_ERR%%ua Haliotis iris to infection by haliotid herpesvirus-1 (HaHV-1) and to the disease abalone viral ganglioneuritis was investigated in experimentally challenged p-aua using high throughput RNA-sequencing. HaHV-1-challenged p-aua up-regulated broad classes of genes that contained chitin-binding peritrophin-A domains, which seem to play diverse roles in the p-aua immune response. The p-aua also up-regulated vascular adhesion protein-1 (VAP-1), an important adhesion molecule for lymphocytes, and chitotriosidase-1 (CHIT-1), an immunologically important gene in mammalian immune systems. Moreover, several blood coagulation pathways were dysregulated in the p-aua, possibly indicating viral modulation. We also saw several indications that neurological tissues were specifically affected by HaHV-1, including the dysregulation of beta-1,4-N-acetylgalactosaminyltransferase (B4GALNT), GM2 ganglioside, neuroligin-4 and the Notch signalling pathway. This research may support the development of molecular therapeutics useful to control and/or manage viral outbreaks in abalone culture.
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Affiliation(s)
- Matthew J Neave
- Australian Animal Health Laboratory, Private Bag 24, Geelong, VIC 3220, Australia
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8
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RNA-seq of HaHV-1-infected abalones reveals a common transcriptional signature of Malacoherpesviruses. Sci Rep 2019; 9:938. [PMID: 30700734 PMCID: PMC6353905 DOI: 10.1038/s41598-018-36433-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 10/31/2018] [Indexed: 12/21/2022] Open
Abstract
Haliotid herpesvirus-1 (HaHV-1) is the viral agent causative of abalone viral ganglioneuritis, a disease that has severely affected gastropod aquaculture. Although limited, the sequence similarity between HaHV-1 and Ostreid herpesvirus-1 supported the assignment of both viruses to Malacoherpesviridae, a Herpesvirales family distantly related with other viruses. In this study, we reported the first transcriptional data of HaHV-1, obtained from an experimental infection of Haliotis diversicolor supertexta. We also sequenced the genome draft of the Chinese HaHV-1 variant isolated in 2003 (HaHV-1-CN2003) by PacBio technology. Analysis of 13 million reads obtained from 3 RNA samples at 60 hours post injection (hpi) allowed the prediction of 51 new ORFs for a total of 117 viral genes and the identification of 207 variations from the reference genome, consisting in 135 Single Nucleotide Polymorphisms (SNPs) and 72 Insertions or Deletions (InDels). The pairing of genomic and transcriptomic data supported the identification of 60 additional SNPs, representing viral transcriptional variability and preferentially grouped in hotspots. The expression analysis of HaHV-1 ORFs revealed one putative secreted protein, two putative capsid proteins and a possible viral capsid protease as the most expressed genes and demonstrated highly synchronized viral expression patterns of the 3 infected animals at 60 hpi. Quantitative reverse transcription data of 37 viral genes supported the burst of viral transcription at 30 and 60 hpi during the 72 hours of the infection experiment, and allowed the distinction between early and late viral genes.
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9
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Bai CM, Li YN, Chang PH, Jiang JZ, Xin LS, Li C, Wang JY, Wang CM. Susceptibility of two abalone species, Haliotis diversicolor supertexta and Haliotis discus hannai, to Haliotid herpesvirus 1 infection. J Invertebr Pathol 2018; 160:26-32. [PMID: 30513284 DOI: 10.1016/j.jip.2018.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 11/28/2018] [Accepted: 11/30/2018] [Indexed: 01/19/2023]
Abstract
Abalone viral ganglioneuritis (AVG), caused by Haliotid herpesvirus-1 (HaHV-1) infection, has been reported as the main cause of mortality and heavy losses of wild and cultivated abalone in Taiwan and Australia since 2003. HaHV-1 DNA has also been reported in diseased abalone collected in early 2000s in China. However, no data is available about the susceptibility, disease process and pathological changes of HaHV-1 infection in the primary cultivated abalone species in China. In the present study, two cultivated abalone species, Haliotis diversicolor supertexta and Haliotis discus hannai, were challenged with HaHV-1-CN2003 collected in 2003 in China using three different methods. Results showed that H. diversicolor supertexta was highly susceptible to HaHV-1-CN2003 infection and suffered acute mortality using all three challenge methods. H. discus hannai was not susceptible to the viral infection. Histopathology combined with transmission electron microscopy and quantitative PCR analysis revealed that the tropism of HaHV-1-CN2003 includes both neural tissue and haemocytes.
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Affiliation(s)
- Chang-Ming Bai
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture, Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Ya-Nan Li
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture, Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; College of Fisheries, Tianjin Agriculture University, Tianjin 300380, China
| | - Pen-Heng Chang
- Institute of Comparative and Molecular Pathobiology, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
| | - Jing-Zhe Jiang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
| | - Lu-Sheng Xin
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture, Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Chen Li
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture, Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
| | - Jiang-Yong Wang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
| | - Chong-Ming Wang
- Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture, Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China.
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10
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Sandoval‐Castillo J, Robinson NA, Hart AM, Strain LWS, Beheregaray LB. Seascape genomics reveals adaptive divergence in a connected and commercially important mollusc, the greenlip abalone (
Haliotis laevigata
), along a longitudinal environmental gradient. Mol Ecol 2018; 27:1603-1620. [DOI: 10.1111/mec.14526] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 12/05/2017] [Accepted: 12/15/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Jonathan Sandoval‐Castillo
- Molecular Ecology Laboratory College of Science and Engineering Flinders University Adelaide SA Australia
| | - Nick A. Robinson
- Nofima Ås Norway
- Sustainable Aquaculture Laboratory School of BioSciences University of Melbourne Parkville Vic Australia
| | - Anthony M. Hart
- Western Australian Fisheries and Marine Research Laboratories Department of Fisheries Western Australia Hillarys WA Australia
| | - Lachlan W. S. Strain
- Western Australian Fisheries and Marine Research Laboratories Department of Fisheries Western Australia Hillarys WA Australia
| | - Luciano B. Beheregaray
- Molecular Ecology Laboratory College of Science and Engineering Flinders University Adelaide SA Australia
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11
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Rosani U, Venier P. Oyster RNA-seq Data Support the Development of Malacoherpesviridae Genomics. Front Microbiol 2017; 8:1515. [PMID: 28848525 PMCID: PMC5552708 DOI: 10.3389/fmicb.2017.01515] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 07/27/2017] [Indexed: 12/24/2022] Open
Abstract
The family of double-stranded DNA (dsDNA) Malacoherpesviridae includes viruses able to infect marine mollusks and detrimental for worldwide aquaculture production. Due to fast-occurring mortality and a lack of permissive cell lines, the available data on the few known Malacoherpesviridae provide only partial support for the study of molecular virus features, life cycle, and evolutionary history. Following thorough data mining of bivalve and gastropod RNA-seq experiments, we used more than five million Malacoherpesviridae reads to improve the annotation of viral genomes and to characterize viral InDels, nucleotide stretches, and SNPs. Both genome and protein domain analyses confirmed the evolutionary diversification and gene uniqueness of known Malacoherpesviridae. However, the presence of Malacoherpesviridae-like sequences integrated within genomes of phylogenetically distant invertebrates indicates broad diffusion of these viruses and indicates the need for confirmatory investigations. The manifest co-occurrence of OsHV-1 genotype variants in single RNA-seq samples of Crassostrea gigas provide further support for the Malacoherpesviridae diversification. In addition to simple sequence motifs inter-punctuating viral ORFs, recombination-inducing sequences were found to be enriched in the OsHV-1 and AbHV1-AUS genomes. Finally, the highly correlated expression of most viral ORFs in multiple oyster samples is consistent with the burst of viral proteins during the lytic phase.
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Affiliation(s)
| | - Paola Venier
- Department of Biology, University of PaduaPadua, Italy
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12
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Diversity of large DNA viruses of invertebrates. J Invertebr Pathol 2017; 147:4-22. [DOI: 10.1016/j.jip.2016.08.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 08/03/2016] [Accepted: 08/04/2016] [Indexed: 11/17/2022]
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13
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Corbeil S, McColl KA, Williams LM, Slater J, Crane MSJ. Innate resistance of New Zealand paua to abalone viral ganglioneuritis. J Invertebr Pathol 2017; 146:31-35. [PMID: 28431886 DOI: 10.1016/j.jip.2017.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/05/2017] [Accepted: 04/16/2017] [Indexed: 10/19/2022]
Abstract
The susceptibility of New Zealand paua (Haliotis iris) to infection by abalone herpesvirus (Haliotid herpesvirus 1; HaHV) and to the disease abalone viral ganglioneuritis (AVG) was determined. Infection challenges performed by intra-muscular injection and by immersion in infectious water containing HaHV demonstrated that New Zealand paua were highly resistant to infection by Haliotid herpesvirus 1 and were fully resistant to the disease AVG.
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Affiliation(s)
- Serge Corbeil
- CSIRO Australian Animal Health Laboratory, Private Bag 24, Geelong, VIC 3220, Australia.
| | - Kenneth A McColl
- CSIRO Australian Animal Health Laboratory, Private Bag 24, Geelong, VIC 3220, Australia
| | - Lynette M Williams
- CSIRO Australian Animal Health Laboratory, Private Bag 24, Geelong, VIC 3220, Australia
| | - Joanne Slater
- CSIRO Australian Animal Health Laboratory, Private Bag 24, Geelong, VIC 3220, Australia
| | - Mark St J Crane
- CSIRO Australian Animal Health Laboratory, Private Bag 24, Geelong, VIC 3220, Australia
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14
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Arzul I, Corbeil S, Morga B, Renault T. Viruses infecting marine molluscs. J Invertebr Pathol 2017; 147:118-135. [PMID: 28189502 DOI: 10.1016/j.jip.2017.01.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 01/20/2017] [Accepted: 01/23/2017] [Indexed: 11/19/2022]
Abstract
Although a wide range of viruses have been reported in marine molluscs, most of these reports rely on ultrastructural examination and few of these viruses have been fully characterized. The lack of marine mollusc cell lines restricts virus isolation capacities and subsequent characterization works. Our current knowledge is mostly restricted to viruses affecting farmed species such as oysters Crassostrea gigas, abalone Haliotis diversicolor supertexta or the scallop Chlamys farreri. Molecular approaches which are needed to identify virus affiliation have been carried out for a small number of viruses, most of them belonging to the Herpesviridae and birnaviridae families. These last years, the use of New Generation Sequencing approach has allowed increasing the number of sequenced viral genomes and has improved our capacity to investigate the diversity of viruses infecting marine molluscs. This new information has in turn allowed designing more efficient diagnostic tools. Moreover, the development of experimental infection protocols has answered some questions regarding the pathogenesis of these viruses and their interactions with their hosts. Control and management of viral diseases in molluscs mostly involve active surveillance, implementation of effective bio security measures and development of breeding programs. However factors triggering pathogen development and the life cycle and status of the viruses outside their mollusc hosts still need further investigations.
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Affiliation(s)
- Isabelle Arzul
- Ifremer, SG2M-LGPMM, Station La Tremblade, 17390 La Tremblade, France
| | - Serge Corbeil
- CSIRO Australian Animal Health Laboratory, 5 Portarlington Road, Geelong East, Victoria 3220, Australia
| | - Benjamin Morga
- Ifremer, SG2M-LGPMM, Station La Tremblade, 17390 La Tremblade, France
| | - Tristan Renault
- Ifremer, RBE, Centre Atlantique, Rue de l'Ile d'Yeu, BP 21105, 44311 Nantes Cedex 03, France.
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15
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Dang C, Miller TL. Disease threats to wild and cultured abalone in Australia. MICROBIOLOGY AUSTRALIA 2016. [DOI: 10.1071/ma16047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Abalone species are important for recreational and commercial fisheries and aquaculture in many jurisdictions in Australia. Clinical infections with viral, bacterial and parasitic pathogens can cause significant losses of wild and cultured stock, and subclinical infections may result in decreased productivity and growth. Infections with abalone herpesviruses (AbHV), Vibrio spp. and parasites of the genus Perkinsus are of particular concern to Australian fisheries. Here we provide a brief overview of these three major pathogen groups and their diagnoses from an Australian perspective.
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