Abstract：The 667 bp control region of mitochondrial DNA from 8 domestic duck breeds and Anas zonorhynchto were sequenced. The genetic polymorphism and the origin of the 8 domestic ducks were analyzed. The result showed that content of nucleotide A, G, C, T were25.5%,15.3%,33.4%and 25.8% respectively. The mutation types were transition and transversion in this region. 20 haplotypes were found in this study, in which Hap2(A7) was major haplotype in 72 domestic ducks. The haplotype diversity(Hd) and average nucleotide diversity(Pi) were 0.67136 and 0.19％, respectively. Hd and Pi of Youxian Sheldrake was the highest in the 8 domestic duck breeds. Kimura 2 parameter genetic distance between the breeds was 0.00056-0.00414. A phylogenetic analysis of the 38
haplotypes identified that the 8 domestic ducks were only origin from Anas platyrhynchos.
