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The 667 bp control region of mitochondrial DNA from 8 representative domestic duckbreeds in China, which were all native preserved duck breeds, and a mallard (6 Anaszonorhyncha individuals) were sequenced. The genetic polymorphism and the origin of the8 domestic ducks were analysed. The result showed that the haplotype diversity (Hd) andaverage nucleotide diversity (Pi) were 0.67136 and 0.19 %, respectively. Hd and Pi of YouxianSheldrake were the highest in the 8 domestic duck breeds. Kimura-2 parameter geneticdistance between the breeds ranged from 0.00056 to 0.00414. The NJ phylogenetic tree andreduced median-joining network chart were constructed by the total 38 haplotypes and 96sequences, which included 12 sequences of Anas platyrhynchos from GenBank, 6 sequencesof Anas zonorhyncha from GenBank and 78 sequences of this study (72 domestic ducks and6 Anas zonorhyncha). The maternal origin of the 8 domestic ducks all originated from Anasplatyrhynchos

Molecular genetic diversity and origin of Chinese domestic duck breeds