The Contribution of Clonality to Population Genetic Structure in the Sea Anemone, Diadumene lineata.
The Contribution of Clonality to Population Genetic Structure in the Sea Anemone, Diadumene lineata.
复制标题
克隆性对海葵群体遗传结构的贡献，Diadumene lineata。
DOI：
10.1093/jhered/esaa050
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Stacy A. Krueger‐Hadfield
中科院分区：
文献类型：
--
作者：
W. Ryan;J. Aida;Stacy A. Krueger‐Hadfield
生态和进化过程的不同取决于遗传多样性在空间中的组织方式。对于无性系生物来说，遗传多样性和基因型多样性的组织可以影响竞争、交配系统和生殖模式的适合度效应，这些都是生命周期进化的关键驱动因素。了解个体繁殖行为如何影响种群遗传结构对于解开这些力量的纠缠是必不可少的，特别是在具有复杂和可塑生命周期的物种中。广泛分布的海葵，Diadumene lineata，表现出温度依赖的裂变，这有助于美国大西洋沿岸克隆率的可预测变化，这是其非本地范围的一部分。由于温暖的环境导致更高的克隆率，我们预计在低纬度与高纬度人群中发现更低的基因型和遗传多样性。我们开发了11个微卫星位点的引物，并对从佛罗里达州到马萨诸塞州8个地点采集的207株海葵进行了基因分型。我们在所有地点都发现了克隆影响，正如预测的那样，在低纬度地点发现了最大的克隆。我们还在配子发生最常见的地区发现了性别的遗传特征。在本地范围外发生性行为的证据对这个物种来说是新的，并为这个成功的入侵者提供了动态的见解。我们的发现也说明了部分克隆分类群给生态进化研究带来的挑战，例如难以采样统计上可靠的基因数量和解释共同的群体遗传指标。例如，我们发现FIS的位点间变异很大，这使得平均多位点FIS的含义不明确。
Ecological and evolutionary processes differ depending on how genetic diversity is organized in space. For clonal organisms, the organization of both genetic and genotypic diversity can influence the fitness effects of competition, the mating system, and reproductive mode, which are key drivers of life cycle evolution. Understanding how individual reproductive behavior contributes to population genetic structure is essential for disentangling these forces, particularly in species with complex and plastic life cycles. The widespread sea anemone, Diadumene lineata, exhibits temperature-dependent fission, which contributes to predictable variation in clonal rate along the Atlantic coast of the United States, part of its non-native range. Because warmer conditions lead to higher rates of clonality, we expected to find lower genotypic and genetic diversity in lower versus higher latitude populations. We developed primers for 11 microsatellite loci and genotyped 207 anemones collected from 8 sites ranging from Florida to Massachusetts. We found clonal influence at all sites, and as predicted, the largest clones were found at lower latitude sites. We also found genetic signatures of sex in the parts of the range where gametogenesis is most common. Evidence of sex outside the native range is novel for this species and provides insights into the dynamics of this successful invader. Our findings also illustrate challenges that partially clonal taxa pose for eco-evolutionary studies, such as difficulty sampling statistically robust numbers of genets and interpretating common population genetic metrics. For example, we found high among-locus variation in FIS, which makes the meaning of mean multilocus FIS unclear.
影响因子：
3.3
作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
影响因子：
4.9
作者：
Krueger-Hadfield, S. A.;Balestreri, C.;Schroeder, D. C.
通讯作者：
Schroeder, D. C.