It is widely believed that Chinese domestic geese originated from A. cygnoides and European domestic geese originated from A. anser. However, most of the evidence supporting this belief originated from maternal phylogenetic studies involving sequencing of a control region of mtDNA. This means that those results lack evidence at the nuclear and population genetics levels. In this study, we analyzed two mitochondrial genes and three nuclear genes from two wild ancestors (A. cygnoides and A.
