The complete mitochondrial genome of Greenidea ficicola (Hemiptera: Aphididae: Greenideinae), a pest of Ficus

Insights into the Evolution of Aphid Mitogenome Features from New Data and Comparative Analysis

The complete mitochondrial genomes and their rearrangement patterns can provide useful information for inferring evolutionary history of organisms. Aphids are one of the insect groups with some unique mitogenome features. In this study, to examine whether some features in aphid mitogenomes are independent species-specific evolutionary events or clade-specific events at certain taxonomic levels, we sequenced three new aphid mitogenomes (Hormaphidinae: Ceratovacuna keduensis, Pseudoregma panicola; Lachninae: Nippolachnus piri) and compared them with all known aphid mitogenomes. The three mitogenomes are 16,059–17,033 bp in length, with a set of 37 typical mitochondrial genes, a non-coding control region and a tandem repeat region. The gene orders of them are all highly rearranged. Within the subfamily Hormaphidinae, the presence of repeat region and mitogenome rearrangement in Cerataphidini species but not in the other two tribes indicate that these may be Cerataphidini-specific features. The same gene rearrangement pattern in the two Lachninae species, N. piri (Tuberolachnini) and Stomaphis sinisalicis (Stomaphidini), supports that this feature should be at least derived from the common ancestor of two tribes. Overall, our data and analyses provide new insights into the evolutionary patterns of gene rearrangement and repeat region in aphid mitogenomes, and further corroborate the potential role of gene rearrangement in elucidating the evolutionary history of different insect lineages.

Complete mitochondrial genome of Mollitrichosiphum tenuicorpus (Okajima, 1908) (Hemiptera: Aphididae: Greenideinae)

Here we report the complete mitochondrial genome of the aphid species Mollitrichosiphum tenuicorpus. The M. tenuicorpus mitogenome is 15,727 bp in length and comprising 37 genes typically present in insect mitogenomes, a control region, and a unique repeat region. All protein-coding genes (PCGs) terminate with TAA or TAG except for cox1, which is terminated with T—. The secondary structure of trnS (AGN) loses the dihydrouridine (DHU) arm, but all the other transfer RNAs show the typical clover-leaf secondary structure. The repeat region between trnE and trnF is 458 bp, with a 217-bp repeat unit repeating 2.11 times. Phylogenetic analysis of the M. tenuicorpus mitogenome using the maximum-likelihood optimality criterion places it in a strongly supported sister position to Eutrichosiphum pasaniae. These data show that mitogenome sequences could be useful in resolving phylogenetic relationships of the Greenideinae.

The complete mitochondrial genome of Aphis gossypii Glover, 1877 (Hemiptera: Aphididae) isolated from Leonurus japonicus in Korea

We have determined the mitochondrial genome of A. gossypii isolated from Leonurus japonicus in Korea. The circular mitogenome of A. gossypii is 16,044 bp, including 13 protein-coding genes, two ribosomal RNA genes, 22 transfer RNAs, and a single control region of 797 bp. AT ratio is 83.8%. 88 SNPs and 4 INDELs (175 bp) were identified against mitogenome of A. gossypii isolated from cotton species. Especially, largest INDEL (170 bp) was in the control region. Phylogenetic trees show that four A. gossypii mitogenomes were clustered in one clade.

The First Complete Mitochondrial Genome of Lachninae Species and Comparative Genomics Provide New Insights into the Evolution of Gene Rearrangement and the Repeat Region

Complete mitochondrial genomes are valuable resources for different research fields such as genomics, molecular evolution and phylogenetics. The subfamily Lachninae represents one of the most ancient evolutionary lineages of aphids. To date, however, no complete Lachninae mitogenome is available in public databases. Here we report the Stomaphis sinisalicis mitogenome, representing the first complete mitogenome of Lachninae. The S. sinisalicis mitogenome is consist of 13 protein-coding genes (PCGs), two rRNA genes (rRNAs), 22 tRNA genes (tRNAs), a control region and a large tandem repeat region. Strikingly, the mitogenome exhibits a novel, highly rearranged gene order between trnE and nad1 compared with that of other aphids. The presence of repeat region in the basal Lachninae may further indicate it is probably an ancestral feature of aphid mitogenomes. Collectively, this study provides new insights on mitogenome evolution and valuable data for future comparative studies across different insect lineages.

The complete mitochondrial genome of Schoutedenia ralumensis Rübsaamen, 1905 (Hemiptera: Aphididae: Greenideinae)

We sequenced the complete mitochondrial genome of Schoutedenia ralumensis. The mitogenome is 16,051 bp long with an A + T content of 84.5%, including 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, a control region, and an aphid-specific repeat region located between trnE and trnF. All protein-coding genes are initiated by ATN and terminated with TAA or TAG except for cox1 and nad5. All transfer RNAs display the typical clover-leaf secondary structure except for trnS (AGN). The unique repeat region is 974 bp long, in which a 305-bp repeat unit repeats 3.19 times. The phylogenetic tree supports a sister relationship of S. ralumensis and Greenidea psidii.