The whole sequence of D-loop of mitochondrial DNA (mtDNA) from 133 individuals representing 10 sheep breeds was analyzed to determine the origin and genetic diversity of domestic sheep. Phylogenetic analyses revealed that there were two mtDNA lineages (A and B) identified in 10 sheep breeds. Population genetic structure and population expansion were carried out. The conclusions were as follows:
1.The results showed that the length of mtDNA D-loop in domestic sheep was 1106~1182 bp. It could be...