基于线粒体基因组和核基因的蚜蝇科昆虫系统发育研究

Syrphidae (hoverflies), an important group of pollinators and insect natural enemies, is known in widely diversity of body color, shape, diet and flight pattern, by which made it as a good system to study biological control, pollination, mimicry, species interaction, life history strategy, coevolution and bionics. Currently, the phylogenetic relationships among the major lineage of Syrphidae is still a controversial point, and the researches on Syrphidae in China stay at the initial stage of species investigation, identification, description and naming. We proposed a phylogenetic study involved about 28 genera and 50 species, which represented all major groups of Syrphidae, to reconstruct the evolutionary history of this insect taxon. Combined with the completed mitochondrial genome date (structure, composition and evolution characterization), 18S rRNA and 28s rRNA, our research target to resolve the phylogenetic status of Syrphidae in Cyclorrhapha and the internal relationships within Syrphidae itself as well, which are the essential questions of Syrphidae classification. With fossil record correction and the geographical reconstruction, the origin history of Syrphidae will also be estimated. The results of this research will contribute to the better understanding of hoverflies phylogeny, which is of great importance for the further biology, ecology and resource utilization studies of Syrphidae.

蚜蝇科昆虫是自然界中重要的授粉昆虫和天敌昆虫，其体色、体型、生活史以及飞行方式等各方面均具有丰富的多样性，可作为生物学防治、传粉、拟态、物种互作、生活史对策、协同进化以及仿生学等热门领域的良好体系。目前关于蚜蝇科高级阶元的系统发育关系仍缺乏统一认识，且该科在我国的研究尚处于物种调查、鉴定描述和命名的初步阶段。本项目拟选28余属50余种蚜蝇科的典型代表类群，在分析线粒体基因组结构、组成和进化特征的基础上，联合18S rRNA和28S rRNA基因片段构建稳健的蚜蝇科系统树，以期解决蚜蝇科在双翅目环裂类中的系统地位，以及蚜蝇科内部亲缘关系存在的争议，为构建合理分类系统提供重要依据；同时结合蚜蝇科昆虫化石信息和地理分布格局，探讨蚜蝇科昆虫的起源和分化历史。研究结果将为准确认识蚜蝇科的系统发育关系做出贡献，这对开展蚜蝇科这一重要昆虫资源的生物学、生态学、资源利用等等都具有重要意义。

蚜蝇科昆虫是自然界中重要的授粉昆虫和天敌昆虫，其体色、体型、生活史以及飞行方式等各方面均具有丰富的多样性，可作为生物学防治、传粉、拟态、物种互作、生活史对策、协同进化以及仿生学等热门领域的良好体系。目前关于蚜蝇科高级阶元的系统发育关系仍缺乏统一认识，且该科在我国的研究尚处于物种调查、鉴定描述和命名的初步阶段。本项目利用高通量测序方法对蚜蝇科主要代表类群进行线粒体基因组测序，分析其线粒体基因组结构、组成和进化特征，联合线粒体基因组、28s rRNA与18s rRNA基因数据集重建蚜蝇科昆虫高级阶元的系统发育关系。研究结果将有助于构建更为合理的蚜蝇分类系统，对开展蚜蝇科这一重要昆虫资源的生物学、生态学、资源利用等等都具有重要的理论和实践意义。