草地贪夜蛾化学感受相关基因家族的进化分析

Evolutionary analysis of chemoreception related gene families of Spodoptera frugiperda

草地贪夜蛾Spodoptera frugiperda于今年1月首次在我国发现以来,已迅速扩散到长江流域省份,对我国玉米生产造成重大危害。本文从全基因组水平对草地贪夜蛾化学感受相关基因进行了鉴定和进化分析。获得了54个气味结合蛋白(odorant binding proteins,OBP)、15个化学感受蛋白(chemosensory proteins,CSP)、82个气味受体(odorant receptors,OR)、210个味觉受体(gustatory receptors,GR)、44个离子型受体(ionotropic receptors,IR)和13个感受神经元膜蛋白(sensory neuron membrane proteins,SNMP)基因。进化分析发现,与家蚕相比,草地贪夜蛾OBP与GR基因具有明显的扩增现象,但SNMP基因存在轻微的收缩。本研究首次从基因组水平鉴定了草地贪夜蛾化学感受相关基因,为进一步开展该物种的相关研究奠定了基础。

Spodoptera frugiperda had spread around to Yangtze River province rapidly, since it was found in China in January, 2019. This pest had caused great harm to maize production in our country. Here, the chemoreception related gene family in 14 insects including S. frugiperda were annotated and analysis. In total, 54 odorant binding protein genes, 15 chemosensory proteins genes, 82 odorant receptor genes, 210 gustatory receptor genes, 44 ionotropic receptor genes and 13 sensory neuron membrane protein genes were found in S. frugiperda. Phylogenetic analysis showed that the OBP genes and GR genes were significantly expanded when compared with Bombyx mori, while the SNMP genes were slightly contracted. This is the first investigation to identify and analyze the chemoreception related gene families in S.frugiperda at the genomic level, which established the foundation to further research of S.frugiperda.