Evidence that DNA-A of a geminivirus associated with severe
cassava mosaic disease in Uganda has arisen by interspecific
recombination
1. (a) Plants grown from cassava cuttings collected from (left) two severely diseased plants from the area of the epidemic,
and (right) two plants from outside the epidemic area. Note extreme stunting and severe mosaic shown by plants in the lefthand
pot and the much lesser degree of stunting of plants in the right-hand pot. (b) Detail of symptoms in leaves from plants
shown in (a). Left, leaf from extremely stunted plant from the epidemic area showing severe mosaic. Centre and right, leaves
from plants from outside the epidemic area, showing moderate and mild mosaic, respectively.