基于线粒体COI基因序列分析辽东湾镰鲳(Pampus echinogaster)群体遗传多样性

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根据线粒体COI基因序列对辽东湾附近海域的镰鲳(Pampus echinogaster)群体(n=28)的遗传多样性进行了研究。在COI序列中,共检测到17个多态性核苷酸位点,定义了12种单倍型,其核苷酸多态度和单倍型多态度都较低(H=0.49±0.12,π=0.16±0.12%)。与黄海、东海的群体相比,辽东湾镰鲳群体的遗传多样性水平较低。利用GenBank数据库中已有的COI同源序列,系统分析和分子变异分析(AMOVA)的结果都表明来自辽东湾的镰鲳个体和东海、南海个体间存在较小但明显的遗传分化。研究结果表明:中国近海的镰鲳尤其是相距较远的群体在其分布范围内可能存在遗传分化现象。 The genetic diversity of Pampus echinogaster population (n = 28) in Liaodong Bay waters was studied based on mitochondrial COI gene sequence. In the COI sequence, 17 polymorphic nucleotide positions were detected and 12 haplotypes were defined, and their nucleotide polymorphism and haplotype diversity were low (H = 0.49 ± 0.12, π = 0.16 ± 0.12%). Compared with the Yellow Sea and East China Sea groups, the genetic diversity of the Fagaceae populations in Liaodong Bay is relatively low. The existing COI homology sequences in GenBank database, phylogenetic analysis and molecular variance analysis (AMOVA) showed that there was a small but significant genetic differentiation among individuals of Sickles androgynous from East China Sea and South China Sea from Liaodong Bay. The results show that there may be genetic differentiation within the distribution range of the sickles in China offshore, especially those far apart.
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