9Winter H, B Mayr, W Schleger,et al. Karyotyping, red blood cells and haemoglobin typing of the mithun (Bos frontalis), its wild ancestor and its hybrids[J]. Research in Veterinary Science,1984 ,36(3):276-283.
10K S Huque, M M Rahman,M A Jalil. Study on the growth pattern of Gayals(Bos Frontalis) and their crossbred calves[J].Asian-Aust. Journal of Animal Science, 2001, 14(9):1245-1249.
8CANN R L,STONEKING M,WILSON A C.Mitochondrial DNA and hu-man evolution[J].Nature,1987,325(6099):31-36.
9VIGILANT L,STONEKING M,HARPENDING H,et al.Afrocan popula-tions and the evolution of human mitochondrial DNA[J].Science,1991,253:1503-1507.
10TANAKA-UENO T,MATSUI M,SATO T,et a1.Phylogenetic relationshipsof brown frogs with 24 chromosomes from Far East Russia and Hokkaidoassessed by mitochondrial cytochrome b gene sequences[J].Zoo Sci,1998,15:289-294.