Characterization of the complete mitochondrial genome of Chilo auricilius and comparison with three other rice stem borers.
Journal: 2014/October - Gene
ISSN: 1879-0038
Abstract:
The mitogenome of Chilo auricilius (Lepidoptera: Pyraloidea: Crambidae) was a circular molecule made up of 15,367 bp. Sesamia inferens, Chilo suppressalis, Tryporyza incertulas, and C. auricilius, are closely related, well known rice stem borers that are widely distributed in the main rice-growing regions of China. The gene order and orientation of all four stem borers were similar to that of other insect mitogenomes. Among the four stem borers, all AT contents were below 83%, while all AT contents of tRNA genes were above 80%. The genomes were compact, with only 121-257 bp of non-coding intergenic spacer. There are 56 or 62-bp overlapping nucleotides in Crambidae moths, but were only 25-bp overlapping nucleotides in the noctuid moth S. inferens. There was a conserved motif 'ATACTAAA' between trnS2 (UCN) and nad1 in Crambidae moths, but this same region was 'ATCATA' in the noctuid S. inferens. And there was a 6-bp motif 'ATGATAA' of overlapping nucleotides, which was conserved in Lepidoptera, and a 14-bp motif 'TAAGCTATTTAAAT' conserved in the three Crambidae moths (C. suppressalis, C. auricilius and T. incertulas), but not in the noctuid. Finally, there were no stem-and-loop structures in the two Chilo moths.
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