Analysis on Systematic Evolution of Chinese Native Light-type Goose Breeds Based on mtDNA D-oop Sequences

To study the systematic evolution of Chinese light-body type goose,the 521bp control region(D-loop) of mitochondrial DNA from13 light-body type goose breeds were sequenced.The results showed that in the D-loop region of the 13 goose breeds,the content of A,G,C and T nucleotides was 32.2%,15.0%,29.0% and 23.8%,respectively.The average haplotype diversity(Hd) and nucleotide diversity(Pi) of domestic ducks were 02153 and 0.00046,respectively.The 13 goose breeds had bigger nucleotide variance value among populations than the value within populations and all the breeds didn't occur population expansion.The phylogenetic trees indicated that Yili goose originated from anser anser and the other 12 goose breeds originated from anser cygnoides.