Objective To determine the complete sequence of mitochondrial D-loop region of Mongolian gerbil based on the PCR products.The sequences were analyzed for phylogenetic tree,nucleotide composition and genetic distance.Methods The primer was designed according to the published partial sequences.The PCR products were sequenced and determined.Combined with the known D-loop region sequence of other rodents,nucleotide composition and genetic distance were analysed,and the phylogenetic tree was constructed by minim...