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Abstract
Hucho hucho, one of the most endangered members of the family Salmonidae, is endemic to the Danube basin. In this study, the complete mitochondrial genome of H. hucho was sequenced and characterized. The genome is 16,751 bp in length and contains 13 protein-coding genes, 2 ribosomal RNAs, 22 transfer RNAs and a noncoding control region. The gene arrangement and nucleotide composition of the mitochondrial genome are similar to those of H. bleekeri. An 82 bp tandem repeat was identified in the control region, which is variable in length and copy number of repeat between and within species. The complete mitochondrial DNA of H. hucho should be useful to study population genetics, biogeography and adaptive evolution of this lineage.
Acknowledgements
Our special thanks to managers of the three salmon hatcheries, Fischer, Laenbercel and a commercial salmon farm in Austral, who provided samples of Hucho hucho and particularly Martin Hochleithner who assisted in the sampling and providing the biological information of Hucho hucho.
Declaration of interest
This work was supported by Special Fund for Agro-Scientific Research in the Public Interest (201203086) and open projects for Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China (No. LFBC0802). The Fundamental Research Funds for the Central Public Research Institutes (2013JBFM19 and 2014A07XK05). The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.