Map of Africa depicting the putative inter-species recombinations of components A and B of cassava mosaic geminivirusess identified in different parts of Africa, either from this study or from GenBank accessions. The significance of the color codes is given in the figure. Where the component B of a particular virus has not been cloned, it is indicated in letters for a different species representative or as a faded drawing for a different isolate. For simplification of the drawing, not all the ACMV isolates have been shown as they are very similar. Similarly, the EACMV-UGs associated with the CMD pandemic now present in several central African countries have not been depicted as they are of very recent introduction (less than 10 years). The solid blue arrows represent the possible "route" of evolution of the EACMCV viruses, and the green arrows represent the possible "route" of evolution of the EACMV viruses.