Complete mitochondrial genome and phylogenetic position of the gall aphid Chaetogeoica ulmidrupa (Hemiptera: Aphididae)

We sequenced two complete mitochondrial genomes of Chaetogeoica ulmidrupa, a gall-forming aphid on Pistacia chinensis. Each genome consists of 13 protein-coding genes, 22 tRNA genes, two rRNA genes and a control region, with a strong A+T bias (∼85%). All protein-coding genes initiate with ATN codon and terminate with TAA, except for ND4 and COX1 ending with a single T. Phylogenetic analysis strongly supported that C. ulmidrupa was sister to C. yunlongensis and together they formed a clade with Slavum lentiscoides, all three species of which feed on the primary host plant P. chinensis to form galls.

本研究对寄生于黄连木（Pistacia chinensis）的造瘿蚜虫Chaetogeoica ulmidrupa的两个完整线粒体基因组（mitochondrial genome）进行了测序。每个线粒体基因组均包含13个蛋白编码基因、22个转运RNA（tRNA）基因、2个核糖体RNA（rRNA）基因以及1个控制区，且具有显著的A+T碱基偏好性（约85%）。所有蛋白编码基因均以ATN密码子起始，以TAA密码子终止，仅ND4与COX1以单个T作为终止密码子。系统发育分析强烈支持Chaetogeoica ulmidrupa与C. yunlongensis互为姐妹群，二者与Slavum lentiscoides共同构成一个演化支；这三个物种均以主要寄主植物黄连木（P. chinensis）为宿主并形成虫瘿。