期刊
AQUACULTURE
卷 540, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.aquaculture.2021.736696
关键词
Large yellow croaker; Acute heat tolerance; GWAS
资金
- Industry-University Collaboration Project of Fujian Province [2019N5001]
- Local Science and Technology Development Project Guide by The Central Government [2017L3019, 2019L3032]
- Open Research Fund Project of State Key Laboratory of Large Yellow Croaker Breeding [LYC2019RS02, LYC2019RS03]
- Science and Technology Platform Construction of Fujian Province [2018N2005]
- Industry-University-Research Cooperation Project of Xiamen University in Ningde [2019C002]
- Foreign Cooperation Project of Fujian Province [2019I1008]
- China Agriculture Research System [CARS-47]
- Independent Research Project for State Key Laboratory of Large Yellow Croaker Breeding [LYC2017ZY01]
Through a genome-wide association study, key genes and SNPs related to acute heat tolerance in large yellow croaker were identified, providing insights into the genetic basis of heat tolerance and predicting potential candidate genes.
Heat tolerance is an important ability for fish to cope with increased temperature. Large yellow croaker (Larimichthys crocea) is one of the most economically important mariculture fish in China. However, the sustainable development of large yellow croaker aquaculture has long been hampered by extremely high temperature in summer, which is further intensified by the ever-increased global warming. To relieve mass death caused by extreme heat events, it is essential to improve the heat tolerance of this species, which will benefit from a comprehensive understanding of the genetic basis underlying heat tolerance. Here, using a 650 K high density SNP array, we conducted a genome-wide association study (GWAS) on acute heat tolerance (AHT) of large yellow croaker. As a result, 5 significant single nucleotide polymorphisms (SNPs) on 4 chromosomes were identified, indicating the polygenic control characteristics of this trait. A clear peak on Chr19 was found and most of the nearby genes showed differential expression during heat stress, indicating the potential relevance of this region with AHT. Based on the 5 identified SNPs, we predicted 30 candidate genes including heat shock factor protein 1, DnaJ homolog subfamily B member 4, protein Hikeshi, protein disulfide-isomerase A3 etc. Further comparative and validation analysis suggested the importance of blood vessel regulation, heat shock response and endoplasmic reticulum stress response in mediating the interindividual AHT variation of large yellow croaker. These results provide insights into the genetic basis of AHT in fish and will be helpful for heat-tolerance improvement of large yellow croaker by marker-assisted selection.
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