Xie Peng, Zhao Guang, Niu Jian-Gong, Wang Jun, Zhou Qiong, Guo Yan, Ma Xu-Fa
College of Fisheries Huazhong Agricultural University Wuhan China.
Fisheries Research Institute of Xinjiang Uygur Autonomous Region Urumqi China.
Ecol Evol. 2019 Jul 2;9(14):7997-8012. doi: 10.1002/ece3.5320. eCollection 2019 Jul.
As a widely distributed species along the Irtysh River, (Kaschtschenko, 1899) was used as a model to investigate genetic diversity and population structure as well as the influence of environmental factors on population genetics. In this study, we specifically developed 12 polymorphic microsatellite loci. The analysis of microsatellite and mtDNA markers revealed a high and a moderate genetic diversity across seven populations, respectively. Moderate differentiation was also detected among several populations, indicating the impact of habitat fragmentation and divergence. The absence of isolation by distance implied an extensive gene flow, while the presence of isolation by adaptation implied that these populations might be in the process of adapting to divergent habitats. Correlation analysis showed that abiotic factors like dissolved oxygen, pH, total dissolved solids, and conductivity in water as well as biotic factors like plankton diversity and fish species diversity had impact on genetic diversity and divergence in populations. The results of this study will provide an insight into the effect of environmental factors on genetic diversity and contribute to the study of population genetics of sympatric species.
作为额尔齐斯河沿岸广泛分布的物种，（卡斯琴科，1899年）被用作研究遗传多样性和种群结构以及环境因素对种群遗传学影响的模型。在本研究中，我们专门开发了12个多态微卫星位点。微卫星和线粒体DNA标记分析分别揭示了七个种群的高遗传多样性和中等遗传多样性。在几个种群中也检测到中等程度的分化，表明栖息地破碎化和分化的影响。距离隔离的缺失意味着广泛的基因流动，而适应性隔离的存在意味着这些种群可能正处于适应不同栖息地的过程中。相关性分析表明，水中的溶解氧、pH值、总溶解固体和电导率等非生物因素以及浮游生物多样性和鱼类物种多样性等生物因素对种群的遗传多样性和分化有影响。本研究结果将有助于深入了解环境因素对遗传多样性的影响，并为同域物种的种群遗传学研究做出贡献。
