Cao Li-Jun, Gao Yong-Fu, Gong Ya-Jun, Chen Jin-Cui, Chen Min, Hoffmann Ary, Wei Shu-Jun
Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Sciences Beijing China.
Beijing Key Laboratory for Forest Pest Control, College of Forestry Beijing Forestry University Beijing China.
Evol Appl. 2019 Aug 8;12(10):1868-1880. doi: 10.1111/eva.12847. eCollection 2019 Dec.
Biological invasions of pests into climatically unsuitable areas can be facilitated by human-regulated environments, in which case there may be an impact on genetic structure through population processes and/or adaptation. Here, we investigated the population genetic structure of an invasive agricultural pest, , in China, which has expanded its distribution range through using greenhouses. Early invaded populations showed a relatively higher level of genetic diversity than recently expanded greenhouse populations. Strong population genetic structure corresponded to a pattern of isolation by distance, with no recent gene flow and low historical gene flow among populations, reflecting limited ongoing dispersal. A genetic signature of population expansion was detected in early invaded populations and three northern populations from greenhouses, suggesting that the greenhouse environments facilitated expansion of this species. Redundancy analysis showed that the independent effects of environment and geography could explain 51.68% and 32.06% of the genetic variance, respectively. These findings point to climate- and greenhouse-related spatial expansion, with the potential for adaptation by . They emphasize the contribution of human-regulated environments on the successes of this invasive species, a situation likely to apply to other invasive species that use greenhouse environments.
害虫向气候不适宜地区的生物入侵可能会受到人类调控环境的促进，在这种情况下，可能会通过种群过程和/或适应对遗传结构产生影响。在此，我们调查了一种入侵性农业害虫在中国的种群遗传结构，该害虫通过利用温室扩大了其分布范围。早期入侵种群的遗传多样性水平相对高于近期扩张的温室种群。强烈的种群遗传结构对应着一种距离隔离模式，种群之间近期没有基因流动，历史基因流动也很低，这反映出当前的扩散有限。在早期入侵种群和来自温室的三个北方种群中检测到了种群扩张的遗传特征，表明温室环境促进了该物种的扩张。冗余分析表明，环境和地理的独立效应分别可以解释51.68%和32.06%的遗传变异。这些发现表明了与气候和温室相关的空间扩张，该害虫具有适应的潜力。它们强调了人类调控环境对这种入侵物种成功的贡献，这种情况可能也适用于其他利用温室环境的入侵物种。
