Abstract
Transposable elements (TEs), also known as jumping genes, are widely spread in the genomes of insects and play a considerable role in genomic evolution. Mariner/DD34D family belongs to class II transposable elements which is widely spread in the genomes of insects and have considerable role in genomic evolution. Mariner like elements (MLEs) were searched in the genomes of seven species of Rhus gall aphids belonging to six genera. In total, 121 MLEs were detected in the genomes of the seven investigated species of Rhus gall aphids, which showed a wide distribution in both close and distant related species. The sequences of MLEs ranged from 1 to 1.4 kb in length and the structural analysis of the MLEs showed that only five copies were potentially active with intact open reading frame (ORF) and terminal inverted repeats (TIRs). Phylogenetic analysis showed that all the 121 MLE sequences belonged to four subfamilies, i.e., Mauritiana, Drosophila, Vertumana and Irritans, among which Drosophila and Vertumana subfamilies were reported in aphids for the first time. Our present report revealed the diversity and distribution of MLEs in Rhus gall aphid genomes and expanded our understandings on the characterization of transposable elements in aphid genomes, which might be useful as genetic markers and tools and would play an important role in genomic evolution and adaptation of aphids.
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