Abstract
The complete mitochondrial genome is of great importance for better understanding of the genome-level characteristics and phylogenetic relationships among related species. In this study, Fenneropenaeus penicillatus mitochondrial genome sequence was determined by next-generation sequencing. The complete genome DNA was 16,040bp in length and consisted of a typical set of 13 protein-coding genes, 22 transfer RNA (tRNA) genes, two ribosomal RNA (rRNA) genes and a putative control region (CR). The gene arrangement is identical to the pancrustacean pattern. The overall base composition of its mitochondrial genome is estimated to be 34.1% for A, 34.1% for T, 12.5% for G and 19.3% for C with a high A+T content (68.2%). The analysis of the average Ka/Ks in the 13 mitochondrial protein-coding genes of penaeid shrimps indicated a strong purifying selection within this group. The phylogenetic analysis based on mitochondrial sequences and 13 concatenated protein-coding genes showed strong statistic support for the following relationship among the five genera ((Penaeus s.s+Fenneropenaeus)+(Litopenaeus+Farfantepenaeus))+Marsupenaeus. The sequence data of F. penicillatus can provide useful information for the studies on molecular systematics, population structure, stock evaluation and conservation genetics.
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