Du Shiyu, Niu Gengyun, Nyman Tommi, Wei Meicai
Central South University of Forestry and Technology, Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees (Central South University of Forestry and Technology), Ministry of Education, Changsha, Hunan, China.
Jiangxi Normal University, Life Science College, Nanchang, Jiangxi, China.
PeerJ. 2018 Dec 21;6:e6131. doi: 10.7717/peerj.6131. eCollection 2018.
We describe Wei & Du sp. nov., a large and beautiful species of Argidae from south China, and report its mitochondrial genome based on high-throughput sequencing data. We present the gene order, nucleotide composition of protein-coding genes (PCGs), and the secondary structures of RNA genes. The nearly complete mitochondrial genome of has a length of 15,576 bp and a typical set of 37 genes (22 tRNAs, 13 PCGs, and 2 rRNAs). Three tRNAs are rearranged in the mitochondrial genome as compared to the ancestral type in insects: and are shuffled, while is translocated from the -- cluster to a location downstream of . All PCGs are initiated by ATN codons, and terminated with TAA, TA or T as stop codons. All tRNAs have a typical cloverleaf secondary structure, except for . H821 of and H976 of are redundant. A phylogenetic analysis based on mitochondrial genome sequences of , 21 other symphytan species, two apocritan representatives, and four outgroup taxa supports the placement of Argidae as sister to the Pergidae within the symphytan superfamily Tenthredinoidea.
我们描述了魏氏锯蜂属新物种（Wei & Du sp. nov.），这是一种来自中国南方的大型美丽锯蜂科物种，并基于高通量测序数据报道了其线粒体基因组。我们展示了基因排列顺序、蛋白质编码基因（PCGs）的核苷酸组成以及RNA基因的二级结构。该锯蜂近乎完整的线粒体基因组长度为15,576 bp，具有一套典型的37个基因（22个tRNA、13个PCG和2个rRNA）。与昆虫的祖先类型相比，该锯蜂线粒体基因组中有三个tRNA发生了重排：trnS1（AGN）和trnK被打乱，而trnQ从trnI-trnQ-trnM簇转移到了trnM下游的一个位置。所有PCG均由ATN密码子起始，并以TAA、TA或T作为终止密码子终止。除trnS1（AGN）外，所有tRNA都具有典型的三叶草二级结构。该锯蜂的H821和另一种锯蜂的H976是多余的。基于该锯蜂、其他21种叶蜂类物种、两个细腰亚目代表以及四个外类群分类单元的线粒体基因组序列进行的系统发育分析支持锯蜂科在叶蜂总科叶蜂超科中作为叶蜂科姐妹群的位置。
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