The razor clam Sinonovacula constricta is a commercially important bivalve in Japan. The current distribution of this species in Japan is limited to Ariake Bay, where the fishery stock is declining. It is necessary to understand the genetic population structure of this species in order to restore the fishery stock while preserving the genetic diversity of the clam. Here, we report for the first time the genetic population structure of S. constricta in Ariake Bay, Japan. Paired-end restriction site-associated DNA sequencing (RAD-Seq) analyzed samples of S. constricta collected from seven mudflats located along Ariake Bay. Two different genetic populations exist in Ariake Bay, one inhabiting wild habitats and the other inhabiting the transplanted area of artificial seedlings. Our results suggest that genetic differentiation occurred between these two populations (Fst value = 0.052), and a high level of genetic differentiation is maintained between the two groups. In the future, monitoring the interbreeding status of the two genetically distinct populations and the genetic differentiation within each population is important for conserving the genetic diversity of S. constricta in Japan.

中文翻译：

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利用RAD-Seq SNP标记揭示了日本有明湾剃刀蛤Sino中华nova的遗传多样性和种群结构。

剃刀蛤Sino中华nova是日本的重要商业双壳类动物。目前该物种在日本的分布范围仅限于有明湾（Ariake Bay），那里的渔业资源正在减少。有必要了解该物种的遗传种群结构，以便在保持蛤类遗传多样性的同时恢复渔业资源。在这里，我们首次报告了日本有明湾的S. constricta的遗传种群结构。收缩链球菌的双末端限制性酶切位点相关DNA测序（RAD-Seq）分析样品从有明湾沿岸的七个滩涂收集。有明湾有两种不同的遗传种群，一种居住在野生栖息地，另一种居住在人工幼苗的移植区。我们的结果表明，这两个群体之间发生了遗传分化（Fst值= 0.052），并且两组之间保持了很高的遗传分化水平。在未来，监控两个遗传上不同的群体的杂交繁殖的状态和每个群体中的遗传分化是节约的遗传多样性重要缢在日本。