Complete mitochondrial genome of Tundra swan Cygnus columbianus jankowskii (Anseriformes: Anatidae).

Cygnus columbianus jankowskiiis a subspecies of Tundra swan, which breeds in eastern Russia and northeast China, wintering in the middle and lower reaches of the Yangtze River. In this study, we used PCR-based method to obtain the complete mtDNA of this subspecies. The arrangement pattern of the complete mtDNA is identical with typical bird species, which is the shortest (16,723 bp) in three subspecies. The length of the PCGs is same except ND2, ND3 and ND6, and the initiation/termination codons are all same with other subspecies. The length of 12S rRNA and 16S rRNA is same withC. c. columbianus, but different fromC. c. bewickii. The length and structure of all tRNAs are the same with other subspecies except for tRNAIle, tRNAleu(CUN)and tRNAser(AGY). The control region is located between tRNAPheand tRNAGlu, but the length is different with others. [ABSTRACT FROM AUTHOR]