| characterization of tobacco geminiviruses in the old and new world. | biological differences and molecular variability between six phenotypically distinct tobacco-infecting geminivirus isolates from southern africa (zimbabwe) and mexico were investigated. host range studies conducted with tobacco virus isolates zim h from zimbabwe and mex 15 and mex 32 from mexico indicated all had narrow host ranges restricted to the solanaceae. alignment of coat protein gene (cp) and common region (cr) sequences obtained by pcr, and phylogenetic analysis of the cp sequences indi ... | 1999 | 10365162 |