【摘要】 在用DNA序列重建蝗科昆虫系统发育的基础上,采用组成成分分析方法对中国蝗科部分昆虫分布区之间的关系进行了研究.虽然用贝叶斯法、最小进化法和最大简约法得到的分子系统树并不完全一致,但根据这些分子系统树得到的严格合意分布区分支图却完全相同.严格合意分布区分支图表明,在这些蝗虫的分布区中,首先在东北区形成,接着在青藏区形成,然后依次在蒙新区、华北区、华东区形成,最后在华中区、西南区和华南区形成.总体来看,位于中国北部的分布区和青藏区比位于中国南部的分布区形成要早,其原因可能与第四纪冰期冰川的活动有关.青藏区和东北区都是较早形成的分布区,由于二者在地理位置上并不相邻,因此可以推测在第四纪更新世后期的间冰期,除了东北区外,青藏区也是蝗科昆虫向其他分布区扩散的一个中心.更多还原

【Abstract】 Based on the phylogenetic relations from DNA sequences, the relationships among distributional areas of some Acrididae insects in China were examined using component analysis. The molecular phylogenetic trees, including bayesian tree, ME tree and MP tree, produced different topologies, but the topologies of the strict consensus area cladograms from different molecular phylogenetic trees were identical. The strict consensus area cladograms suggested that the patterns of distribution of these insects formed firstly in northeastern China, secondly in Qinghai-Xizang, then in North China, Mongolia-Xinjiang and East China in turn, finally in Central China, South China and Southwest China. The distributional areas in north China and Qinghai-Xizang formed earlier than others. This phenomenon is likely related to Pleistocene glacier movements. Because northeastern China and Qinghai-Xizang formed earlier than other distributional areas and they are not adjacent to each other, we supposed that Qinghai-Xizang, in addition to northeastern China, was also a dispersal centre of the Acrididae insects in interglacial stages of the late Pleistocene.更多还原