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Keywords:

  • mtDNA;
  • common carp;
  • Danube;
  • Asia;
  • Amur

Common carp Cyprinus carpio (n=24) from the upper Danube (wild or feral forms, scaleless varieties) as well as Japanese koi shared the identical mtDNA haplotype (565 bp). In contrast, Amur River carp (n=5) exhibited unique haplotypes, 1–12 bp divergent from the Danubian one. These results support an Asian origin and single introduction or domestication event leading to the present diversity of common carp in Europe, as well as the ornamental Japanese koi.