The grooved carpet shell clam Ruditapes decussatus is an economically important bivalve species in Morocco. Assessment of genetic diversity and genetic structure is essential for sustainable exploitation and effective management of this bivalve. Ten microsatellite loci were examined at seven localities along the Moroccan coast to determine the genetic diversity and population structure of the natural population of R. decussatus. A total of 280 clams were analyzed. The highest value of heterozygosity and mean number of alleles were found in the Mediterranean population (He: 0.685 and Na: 7.77), this can be considered in breeding and restocking programs. Five out of seven populations of R. decussatus showed signals of recent bottlenecks. Additionally, significant genetic differentiation among populations was detected (Fst =0.03125, p-val =1.021e−26). Bayesian analysis, neighbor-joining, and DAPC revealed the existence of two main groups spread on both sides of the 25th parallel. The AMOVA highlighted a genetic heterogeneity with the Southern and North group. These findings provide valuable information for efficient management and restocking based on aquaculture production for the Ruditapes decussatus inhabiting the Moroccan coasts.

带凹槽的地毯贝壳蛤蜊 Ruditapes decussatus 是摩洛哥经济上重要的双壳类物种。遗传多样性和遗传结构的评估对于这种双壳贝类的可持续开发和有效管理至关重要。在摩洛哥海岸沿线的七个地点检查了十个微卫星位点，以确定R. decussatus自然种群的遗传多样性和种群结构 。共分析了 280 只蛤蜊。在地中海种群中发现了杂合度和等位基因平均数的最高值（He：0.685 和 Na：7.77），这可以在育种和再放养计划中考虑。七分之五的R. decussatus显示出近期瓶颈的信号。此外，检测到种群之间的显着遗传差异（Fst = 0.03125，p-val = 1.021e-26）。贝叶斯分析、邻居连接和 DAPC 揭示了分布在 25 度平行线两侧的两个主要群的存在。AMOVA 强调了南方和北方群体的遗传异质性。这些发现为基于居住在摩洛哥海岸的Ruditapes decussatus 的水产养殖生产进行有效管理和重新放养提供了有价值的信息 。