3Beard C W,Mason P W.Genetic determinants of altered virulence of Taiwan Residents foot-and-mouth disease virus[J].J Virol,2000,74:987-991.
4Sagedahl A,Giraudo A T.Biochemical characterization of an aphthovirus type C3 strain Resende attenuated for cattle by serial passages in chicken embryos[J].Virology,1987,157:366-374.
5Holland J J,de la Torre J C,Steinhauer D A,et al.RNA virus populations as quasispecies[J].Curr Top Microbiol Immunol,1992,176:548-554.
6Tsai C P,Pan C H,Liu M Y,et al.Molecular epidemiological studies on foot-and-mouth disease type O Tainwan viruses from the 1997 epidemic[J].Vet Microbiol,2000,74(3):207-216.
7Knowles N J,Davies P R,Henry T,et al.Emergence in Asia of foot-and-mouth disease viruses with altered host range:characterization of alteration in the 3A protein[J].J Virol,2001,75(3):1551-1556.
8Felsenstein J.The evolutionary advantage of recombination[J].J Genet,1974,78:737-756.
9Reanney D C.The evolution of RNA viruses[J].Annu Rev Microbiol,1982,36:47-73.