Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
We compared the genetic diversity and structure of wild versus captive-propagated at-risk species of freshwater mussels in Canada, Lampsilis fasciola (wavy-rayed lampmussel; WRL) and Ptychobranchus fasciolaris (kidneyshell; KS), using microsatellite-generated genotypes. No significant differences were detected using Kruskal–Wallis tests that compared the genetic diversity metrics of wild and captive-propagated WRL (from 12 mothers) and KS (from seven mothers). After effective population size (Ne) was estimated, considerable overlap was found in the estimated Ne between wild and captive populations of both species. Pairwise FST and Dest values among wild WRL, hatchery-raised WRL juveniles, and across different time periods (2008–2018) were generally low (FST = 0.007–0.043, Dest = 0.005–0.282). Pairwise FST and Dest for KS were not significant and low (0.012, 0.017). When comparing captive-reared offspring with the wild population, STRUCTURE analysis revealed strong support for a single genetic population. With at least seven females contributing to brood stock, genetic diversity was maintained. Further research is needed to assess the male contribution to each glochidial brood as well as the variability of genetic diversity in individual glochidial broods.

中文翻译：

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Lampsilis fasciola 和 Ptychobranchus fasciolaris（双壳纲：Unionidae）1 的圈养繁殖和野生种群的遗传多样性保持

加拿大渔业和水产科学杂志，提前印刷。
我们使用微卫星生成的基因型，比较了加拿大淡水贻贝的野生与圈养繁殖的高危物种 Lampsilis fasciola（波浪纹贻贝；WRL）和 Ptychobranchus fasciolaris（肾贝；KS）的遗传多样性和结构。使用 Kruskal-Wallis 测试未检测到显着差异，该测试比较了野生和圈养繁殖的 WRL（来自 12 位母亲）和 KS（来自 7 位母亲）的遗传多样性指标。估计有效种群大小 (Ne) 后，发现两个物种的野生种群和圈养种群之间的估计 Ne 有相当大的重叠。野生 WRL、孵化场饲养的 WRL 幼鱼和不同时间段（2008-2018 年）的成对 FST 和 Dest 值普遍较低（FST = 0.007-0.043，Dest = 0.005-0.282）。KS 的成对 FST 和 Dest 不显着且较低（0.012、0.017）。在比较圈养饲养的后代与野生种群时，结构分析显示强烈支持单一遗传种群。至少有 7 只雌性对亲鱼做出贡献，因此保持了遗传多样性。需要进一步的研究来评估雄性对每个钩爪幼虫的贡献以及个体钩爪龙的遗传多样性的变异性。