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Genetic Diversity, Population Structure, and Environmental Adaptation Signatures of Chinese Coastal Hard-Shell Mussel Mytilus coruscus Revealed by Whole-Genome Sequencing

文献类型： 外文期刊

作者： Guo, Feng 1 ; Ye, Yingying 1 ; Zhu, Kecheng 2 ; Lin, Shuangrui 1 ; Wang, Yuxia 3 ; Dong, Zhenyu 3 ; Yao, Ronghui 3 ; Li, Hongfei 1 ; Wang, Weifeng 3 ; Liao, Zhi 3 ; Guo, Baoying 1 ; Yan, Xiaojun 1 ;

作者机构： 1.Zhejiang Ocean Univ, Natl Engn Res Ctr Marine Aquaculture, Zhoushan 316022, Peoples R China

2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploita, Minist Agr & Rural Affairs, Guangzhou 510300, Peoples R China

3.Zhejiang Ocean Univ, Marine Sci & Technol Coll, Zhoushan 316022, Peoples R China

关键词： Mytilus coruscus; whole-genome resequencing; single nucleotide polymorphisms; genetic diversity; selection signatures

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2023 年 24 卷 17 期

页码：

收录情况： SCI

摘要： The hard-shell mussel (Mytilus coruscus) is widespread in the temperate coastal areas of the northwest Pacific and holds a significant position in the shellfish aquaculture market in China. However, the natural resources of this species have been declining, and population genetic studies of M. coruscus are also lacking. In this study, we conducted whole-genome resequencing (WGR) of M. coruscus from eight different latitudes along the Chinese coast and identified a total of 25,859,986 single nucleotide polymorphism (SNP) markers. Our findings indicated that the genetic diversity of M. coruscus from the Zhoushan region was lower compared with populations from other regions. Furthermore, we observed that the evolutionary tree clustered into two primary branches, and the Zhangzhou (ZZ) population was in a separate branch. The ZZ population was partly isolated from populations in other regions, but the distribution of branches was not geographically homogeneous, and a nested pattern emerged, consistent with the population differentiation index (FST) results. To investigate the selection characteristics, we utilized the northern M. coruscus populations (Dalian and Qingdao) and the central populations (Zhoushan and Xiangshan) as reference populations and the southern ZZ population as the target population. Our selection scan analysis identified several genes associated with thermal responses, including Hsp70 and CYP450. These genes may play important roles in the adaptation of M. coruscus to different living environments. Overall, our study provides a comprehensive understanding of the genomic diversity of coastal M. coruscus in China and is a valuable resource for future studies on genetic breeding and the evolutionary adaptation of this species.

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