文献类型： 外文期刊
作者： Ding, Weidong 1 ; Zhang, Xinhui 2 ; Zhao, Xiaomeng 2 ; Jing, Wu 1 ; Cao, Zheming 1 ; Li, Jia 2 ; Huang, Yu 2 ; You, Xinxi 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Minist Agr, Key Lab Freshwater Fisheries & Germplasm Resource, Wuxi, Jiangsu, Peoples R China
2.BGI Marine, BGI Acad Marine Sci, Sherehen Key Lab Marine Genom, Guangdong Prov Key Lab Mol Breeding Marine Econ A, Shenzhen, Peoples R China
3.Univ Chinese Acad Sci, BGI Educ Ctr, Shenzhen, Peoples R China
4.BGI Zhenjiang Inst Hydrobiol, Zhenjiang, Jiangsu, Peoples R China
关键词： the mandarin fish (Siniperca chuatsi); whole-genome sequencing; feeding habit; molecular mechanism; chromosome-level genome assembly
期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.599； 五年影响因子：4.888 ）
ISSN：
年卷期： 2021 年 12 卷
页码：
收录情况： SCI
摘要： The mandarin fish, Siniperca chuatsi, is an economically important perciform species with widespread aquaculture practices in China. Its special feeding habit, acceptance of only live prey fishes, contributes to its delicious meat. However, little is currently known about related genetic mechanisms. Here, we performed whole-genome sequencing and assembled a 758.78 Mb genome assembly of the mandarin fish, with the scaffold and contig N50 values reaching 2.64 Mb and 46.11 Kb, respectively. Approximately 92.8% of the scaffolds were ordered onto 24 chromosomes (Chrs) with the assistance of a previously established genetic linkage map. The chromosome-level genome contained 19,904 protein-coding genes, of which 19,059 (95.75%) genes were functionally annotated. The special feeding behavior of mandarin fish could be attributable to the interaction of a variety of sense organs (such as vision, smell, and endocrine organs). Through comparative genomics analysis, some interesting results were found. For example, olfactory receptor (OR) genes (especially the beta and delta types) underwent a significant expansion, and endocrinology/vision related npy, spexin, and opsin genes presented various functional mutations. These may contribute to the special feeding habit of the mandarin fish by strengthening the olfactory and visual systems. Meanwhile, previously identified sex-related genes and quantitative trait locis (QTLs) were localized on the Chr14 and Chr17, respectively. 155 toxin proteins were predicted from mandarin fish genome. In summary, the high-quality genome assembly of the mandarin fish provides novel insights into the feeding habit of live prey and offers a valuable genetic resource for the quality improvement of this freshwater fish.
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