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Genetic structure and diversity of Crassostrea gigas in Korea revealed from microsatellite markers

机译：从微卫星标记揭示韩国红景天的遗传结构和多样性

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The Pacific oyster, Crassostrea gigas, is the main oyster species cultivated in Korea. Despite a long history of hatchery practices, little is known about the population genetics of native populations of C. gigas in Korea. This study examined the population structure and genetic diversity of 297 individuals of C. gigas in six populations, representing two major geographically separated habitats along the coast of Korea, using multiplex assays with nine highly polymorphic loci. All populations showed very high genetic diversity, with a deficit of heterozygotes and a recent bottleneck. No significant differences were found in the genetic diversity of the two geographically separated oyster groups, although significant, but minimal, genetic differentiation was observed (F-ST = 0.003, p = 0.002). This was mainly due to genetic differences between the oyster populations from Taean and Gaduk, suggesting that the oyster is not panmictic. This result was corroborated by an analysis of molecular variance (AMOVA) and multidimensional scaling analysis. It was inconsistent with a previous finding of no population differentiation using mitochondrial sequence analysis, implying rather recent separation of the two geographic populations. This genetic differentiation might have resulted from the combined of various factors, such as historical dispersal, the local environment, and ocean currents. Nonetheless, these results mean that the two geographical groups should be treated as independent units for proper resource management. Our results provide critical information on the ecological and economic potential of the Korean Pacific oyster
机译：太平洋牡蛎Crassostrea gigas是韩国养殖的主要牡蛎品种。尽管孵化场实践已有悠久的历史，但对韩国原产C. gigas种群的种群遗传学知之甚少。这项研究使用9个高度多态性位点的多重分析方法，研究了代表韩国大洋沿岸两个主要地理上分离的栖息地的六个种群中297个长臂梭菌的种群结构和遗传多样性。所有种群均显示出很高的遗传多样性，缺乏杂合子和最近的瓶颈。在两个地理上分开的牡蛎群体的遗传多样性中没有发现显着差异，尽管观察到显着但最小的遗传分化（F-ST = 0.003，p = 0.002）。这主要是由于来自Taean和Gaduk的牡蛎种群之间的遗传差异，这表明牡蛎不是panmicic的。分子差异分析（AMOVA）和多维尺度分析证实了这一结果。这与先前使用线粒体序列分析未发现种群分化的发现不一致，这暗示着这两个地理种群的近期分离。这种遗传分化可能是由多种因素共同导致的，例如历史传播，当地环境和洋流。但是，这些结果意味着应该将这两个地理区域视为独立的单位，以进行适当的资源管理。我们的研究结果提供了有关韩国太平洋牡蛎的生态和经济潜力的重要信息

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