The first complete mitochondrial genome of Matsucoccidae (Hemiptera, Coccoidea) and implications for its phylogenetic position

被引:0
作者
Hu, Kai [1 ]
Yu, Sanpeng [1 ]
Zhang, Niannian [1 ]
Tian, Maojuan [1 ]
Ban, Qiming [2 ]
Fan, Zhongliang [3 ]
Qiu, Jiansheng [1 ]
机构
[1] Guizhou Acad Forestry, Guiyang, Peoples R China
[2] Forestry Adm Wangmo Cty, Qianxinan, Peoples R China
[3] Forestry Adm Huichuan Dist, Zunyi, Peoples R China
关键词
mitogenome; scale insect; phylogenetic analysis; secondary structure; Sternorrhyncha; SPECIES HEMIPTERA; DNA; APHID; STERNORRHYNCHA; MORPHOLOGY; EVOLUTION; MODEL; SCALE;
D O I
10.3897/BDJ.10.e94915
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
The mitochondrial genome (mitogenome) has been extensively used to better understand the phylogenetic relationships within the hemipteran suborder Sternorrhyncha, but sequenced mitogenomes remain unavailable for the entire family Matsucoccidae to date. To address this, here we sequenced the complete mitogenome of Matsucoccus matsumurae; the first for this family. The mitogenome is 15,360 bp in size and comprises the typical set of 37 mitochondrial genes and a large non-coding region (AT-rich region). Gene order, nucleotide composition and codon usage of protein-coding genes (PCGs) of M. matsumurae differ considerably from those of the other two sequenced Coccidae species. All PCGs were initiated by the ATN start codons and ended with the TAA/G or single T-- stop codons. Nine transfer RNA genes could be folded into typical clover-leaf secondary structures. The length and AT content of the ribosomal RNA genes are highly conserved in the Coccoidea mitogenomes. In contrast, the AT-rich control region is highly variable in size and in the number of tandem repeats. The sliding window analysis showed that the cox1 gene is the most conserved amongst the 13 PCGs, while the ratios of non-synonymous to synonymous substitution rates indicated that the evolution of this mitogenome has been dominated by positive selection. Phylogenetic analyses, based on nucleotide sequence data of 37 mitochondrial genes and amino acid sequence data of 13 PCGs using Bayesian Inference and Maximum Likelihood methods, showed that Matsucoccidae diverged before the Coccidae.
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页数:20
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