Article
Biology
Xiang Zhang, Bo-Wen Huang, Yu-Dong Zheng, Lu-Sheng Xin, Wen-Bo Chen, Tao Yu, Chen Li, Chong-Ming Wang, Chang-Ming Bai
Summary: The rapid growth of Pacific oyster aquaculture industry in China has led to the emergence of mass mortalities. The study found that OsHV-1, Vibrio natriegens, and Vibrio alginolyticus pose potential risks to the industry.
Article
Fisheries
Yuanxin Liang, Chengxun Xu, Qi Li
Summary: For aquatic species, intense artificial selection results in decreased genetic diversity and increased genotypic purity, affecting their adaptation to the environment. This study demonstrates that crossbreeding between selected lines of Pacific oysters can improve growth, survival, and genetic diversity. The hybrids showed higher phenotypic traits and genetic diversity compared to purebreds.
Article
Virology
Maximilian de Kantzow, Paul M. Hick, Richard J. Whittington
Summary: Exposure to inactivated or infectious OsHV-1 provides significant protection against mortality caused by virulent OsHV-1 in Pacific oysters. This finding has potential applications in oyster farming but requires further development and optimization.
Article
Zoology
Lionel Degremont, Benjamin Morga, Elise Maurouard, Marie-Agnes Travers
Summary: This study optimized breeding programs for dual resistance to OsHV-1 and V. aestuarianus, determining the earliest life stage for oysters to develop disease resistance. Results showed that resistance to OsHV-1 could be evaluated at the larval stage and resistance to V. aestuarianus could be evaluated at the juvenile stage.
JOURNAL OF INVERTEBRATE PATHOLOGY
(2021)
Article
Microbiology
Lizenn Delisle, Olivier Laroche, Zoe Hilton, Jean-Francois Burguin, Anne Rolton, Jolene Berry, Xavier Pochon, Pierre Boudry, Julien Vignier
Summary: The role of oyster microbiota in Pacific oyster mortality syndrome (POMS) is not fully understood. This study describes the temporal kinetics of POMS and the changes in microbiota during infection, and identifies both harmful and beneficial bacteria that may influence disease outcomes. These findings open new perspectives on using microbiome composition as a screening tool for shellfish health and predicting oyster vulnerability to POMS.
MICROBIOLOGY SPECTRUM
(2022)
Article
Fisheries
Yulu Chen, Chengxun Xu, Qi Li
Summary: This study assessed the genetic diversity of the base population and improved orange-shell line using microsatellites and mitochondrial DNA sequences, finding that mass selection did not greatly impact the genetic diversity of the improved orange-shell line. This provides important insights into the utilization of shell color variants and future genetic improvement through selective breeding in aquaculture.
Article
Microbiology
Mingjia Yu, Xiaobo Wang, Aixian Yan
Summary: The study reveals a high level of microbial diversity in retail oysters from Guangdong region, including pathogenic bacteria. The abundance of bacteria in oysters poses significant health risks for consumers.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Fisheries
Gaowei Jiang, Yifei Zhang, Lijie Du, Yulu Chen, Yuanxin Liang, Yi Yu, Chengxun Xu, Qi Li
Summary: Summer mass mortality is a major problem for Pacific oyster production. Selective breeding can improve summer survival rate and growth, but may decrease genetic diversity and cause inbreeding depression.
Article
Fisheries
Dongshu Wu, Ben Yang, Qi Li, Shikai Liu
Summary: This study aimed to estimate the genetic parameters for female reproduction traits in Pacific oysters, including relative brood amount and egg diameter. The heritability of these traits ranged from 0.32 to 0.38, indicating the potential for improvement through selective breeding. The genetic and phenotypic correlations between female reproduction and growth traits were low, suggesting that these traits can be improved independently.
Article
Fisheries
Shasha Wu, Weilin Wang, Qing Li, Jialuo Li, Miren Dong, Xiaoxu Zhou, Lingling Wang, Linsheng Song
Summary: Recent findings show that Wnt signaling plays an important role in regulating the differentiation and proliferation of immune cells. In this study, a Wnt-1 homolog (CgWnt-1) was identified from oyster Crassostrea gigas, and its mRNA expression was found to be significantly up-regulated during the later stages of embryonic development. CgWnt-1 was highly expressed in the mantle of adult oyster. After stimulation with Vibrio splendidus, the mRNA expression levels of CgWnt-1 and Cg8-catenin in haemocytes were significantly increased. Injection of recombinant protein (rCgWnt-1) into oyster resulted in the up-regulation of cell proliferation related genes and an increase in the percentage of proliferating cells in haemocytes. The inhibitory effect of the Wnt signal inhibitor C59 on these responses was also demonstrated. These results indicate that CgWnt-1 plays a role in modulating haemocyte proliferation and immune response in oysters.
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
(2023)
Article
Fisheries
Yifei Zhang, Yulu Chen, Chengxun Xu, Qi Li
Summary: In this study, the effectiveness of shell color selection of Pacific oysters was evaluated using CIELAB colorimetric analysis and genetic analysis. The results showed significant differences in color parameters and genetic diversity among different shell color strains. Population simulation and pairwise FST analysis demonstrated high genetic differentiation among the four shell color strains.
Article
Immunology
Xiaoyu Gu, Xue Qiao, Simiao Yu, Xiaorui Song, Lingling Wang, Linsheng Song
Summary: CgLSD1 is an important epigenetic regulator in hematopoiesis, playing a key role in regulating hemocyte proliferation in oysters.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Chemistry, Medicinal
Monika Dhanji-Rapkova, Andrew D. Turner, Craig Baker-Austin, Jim F. Huggett, Jennifer M. Ritchie
Summary: A potent and heat-stable toxin, TTX, accumulates in various marine bivalve species, including Pacific oysters, with the highest concentrations found in the digestive gland. TTX levels vary significantly between different geographical locations and within populations of oysters, suggesting high variability in toxin distribution.
Article
Environmental Sciences
Xuekai Zhang, Chao Fan, Jinlong Li, Xingzhi Zhang, Qiongzhen Li, Zhaoping Wang
Summary: This study analyzed the molecular processes in hybrids of Pacific oyster under hypoxia stress and identified significant differentially expressed genes related to cell survival and immune response.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
Shangyu Zhai, Ben Yang, Fuqiang Zhang, Qi Li, Shikai Liu
Summary: The Pacific oyster showed high phenotypic variation in resistance to Vibrio alginolyticus infection, with low to moderate heritability estimates for resistance. High correlation coefficients among family estimated breeding values suggest consistent predictive ability of different models for family EBVs. The low genetic and phenotypic correlation with growth traits indicate the feasibility of simultaneous genetic improvement in both growth and resistance traits.