Abstract Striped venus clam, Chamelea gallina, is an economically important clam species inhabiting coastal waters of the Mediterranean Sea, the Adriatic Sea, the Black Sea, and the Eastern Atlantic Ocean coasts of Europe. Despite the economic value of the species, there is limited information about genetic variability and structure on a geographical scale. In this study, the population genetic structure of C. gallina sampled from the Black Sea, the Levantine Sea, the Adriatic Sea, and the Atlantic Ocean was assessed by using microsatellites, mtDNA and nuclear markers. No significant genetic difference was found between sampling sites and geographic regions based on the microsatellite analysis leading to the inference that gene flow was sufficient across sampling sites. Positive and significant spatial autocorrelation of microsatellite genotypes was detected among C. gallina sampled within the geographic range of 100−300 km. The structure analysis did not reveal population sub-structuring. High level of genetic homogeneity in the Black Sea indicates that striped venus clam could be managed at the regional level. COI appeared to be comparatively more polymorphic than 16S rRNA and ITS2. Based on COI and 16S rRNA sequence analysis, the Black Sea specimens were identified and separated from the Levantine Sea, the Adriatic Sea, and the Atlantic Ocean specimens. Both mtDNA and nuclear markers were able to discriminate C. gallina and C. striatula. Meanwhile, microsatellite loci were successfully cross amplified in C. striatula specimens but did not discriminate taxa. Our study revealed the extant population genetic structure of C. gallina and explained the weak population structure of a species with a long planktonic larval stage.

中文翻译：

---

条纹金星蛤的遗传种群结构 Chamelea gallina 整个范围

摘要 条纹金星蛤（Chamelea gallina）是一种重要的经济蛤类，栖息于地中海、亚得里亚海、黑海和欧洲东大西洋沿岸的沿海水域。尽管该物种具有经济价值，但关于地理范围内遗传变异和结构的信息有限。本研究利用微卫星、mtDNA和核标记对黑海、黎凡特海、亚得里亚海和大西洋采样的C. gallina种群遗传结构进行了评估。根据微卫星分析，在采样点和地理区域之间没有发现显着的遗传差异，从而推断基因流在采样点之间是足够的。在 100-300 km 地理范围内采样的 C. gallina 中检测到微卫星基因型的正显着空间自相关。结构分析没有揭示群体亚结构。黑海的高水平遗传同质性表明条纹金星蛤可以在区域一级进行管理。COI 似乎比 16S rRNA 和 ITS2 更具多态性。基于COI和16S rRNA序列分析，从黎凡特海、亚得里亚海和大西洋标本中对黑海标本进行了鉴定和分离。mtDNA 和核标记都能够区分 C. gallina 和 C. striatula。同时，微卫星位点在 C. striatula 标本中成功交叉扩增，但没有区分分类群。