Zhang Yu-Jie, Song Wei, Cao Li-Jun, Chen Jin-Cui, Hoffmann Ary A, Wen Jun-Bao, Wei Shu-Jun
Beijing Key Laboratory for Forest Pests Control, College of Forestry Beijing Forestry University Beijing China.
Institute of Plant Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China.
Ecol Evol. 2022 Apr 6;12(4):e8806. doi: 10.1002/ece3.8806. eCollection 2022 Apr.
Increasing damage of pests in agriculture and forestry can arise both as a consequence of changes in local species and through the introduction of alien species. In this study, we used population genetics approaches to examine population processes of two pests of the tree-of-heaven trunk weevil (TTW), (Harold) and the tree-of-heaven root weevil (TRW), . (Motschulsky) on the tree-of-heaven across their native range of China. We analyzed the population genetics of the two weevils based on ten highly polymorphic microsatellite markers. Population genetic diversity analysis showed strong population differentiation among populations of each species, with ranges from 0.0197 to 0.6650 and from -0.0724 to 0.6845, respectively. Populations from the same geographic areas can be divided into different genetic clusters, and the same genetic cluster contained populations from different geographic populations, pointing to dispersal of the weevils possibly being human-mediated. Redundancy analysis showed that the independent effects of environment and geography could account for 93.94% and 29.70% of the explained genetic variance in TTW, and 41.90% and 55.73% of the explained genetic variance in TRW, respectively, indicating possible impacts of local climates on population genetic differentiation. Our study helps to uncover population genetic processes of these local pest species with relevance to control methods.
农业和林业中害虫造成的损害增加，既可能是当地物种变化的结果，也可能是外来物种引入所致。在本研究中，我们采用群体遗传学方法，在中国臭椿全自然分布范围内，研究了两种臭椿害虫，即臭椿沟眶象（Eucryptorrhynchus brandti (Harold)）和臭椿根象（Eucryptorrhynchus chinensis (Motschulsky)）的种群动态。我们基于10个高度多态性的微卫星标记，分析了这两种象甲的群体遗传学。群体遗传多样性分析表明，每个物种的种群间存在强烈的种群分化，臭椿沟眶象和臭椿根象的FST范围分别为0.0197至0.6650和-0.0724至0.6845。来自相同地理区域的种群可分为不同的遗传簇，而相同的遗传簇包含来自不同地理种群的个体，这表明象甲的扩散可能是由人类介导的。冗余分析表明，环境和地理的独立效应分别可解释臭椿沟眶象遗传变异的93.94%和29.70%，以及臭椿根象遗传变异的41.90%和55.73%，这表明当地气候可能对种群遗传分化产生影响。我们的研究有助于揭示这些本地害虫物种的种群遗传过程，这与控制方法相关。
