Lab for Molecular Ecology and Phylogenetics, Northern Arctic Federal University, Arkhangelsk, Russian Federation.
Institute of Biogeography and Genetic Resources, Federal Center for Integrated Arctic Research, Russian Academy of Sciences, Arkhangelsk, Russian Federation.
PLoS One. 2018 Apr 4;13(4):e0194200. doi: 10.1371/journal.pone.0194200. eCollection 2018.
Populations of widespread pest insects in tropical areas are characterized by a complex evolutionary history, with overlapping natural and human-mediated dispersal events, sudden expansions, and bottlenecks. Here, we provide biogeographic reconstructions for two widespread pest species in the tiger moth genus Creatonotos (Lepidoptera: Erebidae: Arctiinae) based on the mitochondrial cytochrome c oxidase subunit I (COI) gene. The Asian Creatonotos transiens reveals shallow genetic divergence between distant populations that does not support its current intraspecific systematics with several local subspecies. In contrast, the more widespread Creatonotos gangis comprises at least three divergent subclades corresponding to certain geographic areas, i.e. Australia, Arabia + South Asia and Southeast Asia. With respect to our approximate Bayesian computation (ABC) model, the expansion of Creatonotos gangis into Australia is placed in the Late Pleistocene (65-63 ka). This dating coincide with an approximate time of the earliest human migration into the continent (65-54 ka) and the period of intervisibility between Timor and Australia (~65-62 ka). Our findings highlight that the drying Sunda and Sahul shelf areas likely support successful migrations of Asian taxa into Australia during the Pleistocene. The phylogeographic patterns discovered in this study can be used to improve the effectiveness of integrated pest control programs that is a task of substantial practical importance to a broad range of agricultural stakeholders.
在热带地区，广泛分布的害虫种群具有复杂的进化历史，存在重叠的自然和人为介导的扩散事件、突然扩张和瓶颈。在这里，我们基于线粒体细胞色素 c 氧化酶亚基 I（COI）基因，为虎蛾属 Creatonotos 中的两种广泛分布的害虫提供了生物地理重建。亚洲的 Creatonotos transiens 在遥远的种群之间表现出浅的遗传分化，这并不支持其当前的种内分类学，其中包括几个当地亚种。相比之下，分布更广的 Creatonotos gangis 至少由三个不同的亚群组成，对应于某些地理区域，即澳大利亚、阿拉伯半岛+南亚和东南亚。就我们的近似贝叶斯计算（ABC）模型而言，Creatonotos gangis 向澳大利亚的扩张发生在更新世晚期（约 65-63 千年前）。这一日期与人类最早向该大陆迁徙的时间（约 65-54 千年前）以及帝汶岛和澳大利亚之间可见性的时期（约 65-62 千年前）相符。我们的发现强调了在更新世期间，干燥的巽他和萨胡尔陆架地区可能支持亚洲分类群成功向澳大利亚迁徙。本研究中发现的系统地理格局可用于提高综合虫害控制计划的有效性，这是一个对广泛的农业利益相关者具有重要实际意义的任务。
