Complete mitochondrial genome of the water flea Daphnia magna (Cladocera, Daphniidae)

Abstract

The complete mitochondrial genome was sequenced from the KIT strain of the freshwater water flea (Daphnia magna). The sequenced genome size was 15,253 bp long, possessing identical gene order and contents to those of the congeneric species Daphnia galeata in the genus Daphnia, while the direction of ND2 gene in some strains of D. magna was opposite. The mitochondrial genome of D. magna has 13 protein-coding genes (PGCs), 2 rRNAs, and 22 tRNAs. Of 13 PGCs, five genes (ND2, CO1, CO2, ND4, and ND5) had incomplete stop codons. Furthermore, the stop codons of the remaining eight PGCs were TAG and TAA, while the start codon of CO1 gene was CTA. The base composition of D. magna mitogenome shows an anti-G and -C bias (17.1% and 17.2%) on 13 PCGs, respectively.

Keywords

• daphnia magna
• kit strain
• nd2