Journal of Tropical Oceanography >
Population genetic structure and historical dynamics of Trachurus japonicus in the China seas based on mitochondrial control region
Copy editor: YIN Bo
Received date: 2020-11-02
Request revised date: 2021-02-22
Online published: 2021-02-25
Supported by
National Key Research and Development Program of China(2018YFD0900902)
National Key Research and Development Program of China(2018YFD0900904)
Strategic Priority Research Program of Chinese Academy of Sciences(XDB42030203)
Shanghai Science and Technology Committee “Science and Technology Innovation Action Plan”“One Belt and One Road” International Cooperation Project of Shanghai(18230743200)
Copyright
As a dominant fishing species, Trachurus japonicus plays an important role in marine food web. However, T. japonicus experienced rapid collapse in population size and decrease in body size due to environmental pollution and overfishing. To uncover evolutionary influence of anthropic activities on marine species in the China seas, we examined genetic structure and population historical dynamics of T. japonicus based on mitochondrial DNA control region. The results were shown in the following: 1) High haplotype diversity (Hd = 0.998±0.001) and high nucleotide diversity (π = 0.01259±0.00041) of T. japonicus were observed in the study areas; 2) A single star-like bursting lineage was identified in the reconstructed haplotypes network and phylogenetic tree based on maximum likelihood method; 3) Genetic variation of T. japonicus occurred mainly within the populations (99.39%) instead of among different geographic populations according to analyses of molecular variance, and no significant genetic differentiation was observed among the East China Sea shelf, coastal Fujian and Beibu Gulf populations; 4) Recent demographic expansions in the East China Sea shelf, coastal Fujian province, Beibu Gulf and overall populations were consistently suggested by neutral tests and mismatch distribution analysis. Thus, T. japonicus can be managed as a single and genetic homogeneous population in the China seas. Even if high fishing pressure had been kept on T. japonicus during the past several decades, strong recovery potential for this species could still be expected in the China seas.
REN Huimin , ZHANG Heng , XU Shasha , LI Shengfa , LI Jiansheng , LI Zhihong , HE Lijun . Population genetic structure and historical dynamics of Trachurus japonicus in the China seas based on mitochondrial control region[J]. Journal of Tropical Oceanography, 2021 , 40(5) : 36 -44 . DOI: 10.11978/2020129
表1 竹荚鱼取样信息及线粒体控制区序列遗传多态性参数Tab. 1 Sampling information and genetic diversity parameters of Trachurus japonicus based on mitochondrial control region |
海区 | 位置信息 | 序列来源 | Genbank登陆号 | 样本数 | 单倍型数 | 单倍型多样性 (Hd±SD) | 核苷酸多样性 (π±SD) |
---|---|---|---|---|---|---|---|
东海 | 东海-大陆架 | 本研究 | / | 30 | 30 | 1.000±0.009 | 0.01170±0.00066 |
福建近海 | 牛素芳等(2011) | HM212543~HM212595 | 60 | 53 | 1.000±0.004 | 0.01288±0.00061 | |
合计 | / | / | 90 | 80 | 0.999±0.002 | 0.01248±0.00045 | |
南海-北部湾 | 南海-防城港 | Genbank | FJ914949~FJ914987 /GQ382142~GQ382149 | 47 | 43 | 0.996±0.005 | 0.01302±0.00078 |
中国近海 | 东海-南海 | / | / | 137 | 118 | 0.998±0.001 | 0.01259±0.00041 |
注: / 表示无此项 |
图1 基于线粒体控制区的竹荚鱼单倍型网络图不同颜色代表不同地理分布的单倍型。各单倍型地理信息为: C/D来自东海大陆架, HAP来自福建沿海, FCH来自南海北部湾防城港近岸 Fig. 1 Haplotype network of Trachurus japonicus based on mitochondrial control region. Geographic distribution information of each haplotype was distinguished using different colors: red ones from the Beibu Gulf in the South China Sea, blue ones from the East China Sea shelf, and yellow ones from coastal Fujian Province in the East China Sea |
图2 基于线粒体控制区的竹荚鱼最大似然树各单倍型地理信息为: C/D来自东海大陆架, HAP来自福建沿海, FCH来自南海北部湾防城港近岸 Fig. 2 Maximum likelihood tree of Trachurus japonicus based on mitochondrial control region. Geographic information of each haplotype is indicated: C/D from the East China Sea shelf, HAP from coastal Fujian Provincce in the East China Sea, and FCH from coastal Fangchenggang City in the Beibu Gulf of the South China Sea |
表2 中国近海竹荚鱼群体的分子方差分析Tab. 2 AMOVA of Trachurus japonicus in the China seas based on mitochondrial control region |
变异来源 | 自由度 | 平方和 | 变异组成 | 变异百分比/% | 遗传分化系数(Fst) |
---|---|---|---|---|---|
群体间 | 2 | 13.955 | 0.03385Va | 0.61 | / |
群体内 | 127 | 704.576 | 5.54784Vb | 99.39 | / |
整体 | 129 | 718.531 | 5.58169 | / | 0.00606 |
注: / 表示无此项; Va代表群体间变异; Vb代表群体内变异 |
图3 竹荚鱼不同地理群体的单倍型歧点分布分析图a. 东海; b. 南海-北部湾; c. 整体。SSD表示离差平方和, p表示SSD统计的显著性值 Fig. 3 Mismatch distribution analysis of Trachurus japonicus |
表3 中国近海竹荚鱼群体的中性检验Tab. 3 Neutrality tests of Trachurus japonicus populations in the China seas |
群体 | 群体大小 | Fu’s Fs检验 | Tajima’s D检验 |
---|---|---|---|
东海 | 83 | -24.506** | -1.111 |
南海-北部湾 | 47 | -24.302** | -1.319 |
整体 | 130 | -24.572** | -1.327 |
注: ** 表示差异极显著(p<0.01) |
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