Host range and symptom variation of pseudorecombinant virus produced by two distinct bipartite geminiviruses - Brief report

Within the whitefly group only the species Bemisia tabaci (Gennadius) is th e vector. Most whitefly-transmitted geminiviruses possess bipartite DNA gen omes, DNAs A and B. Although they are closely related to each other, the pr oduction of viable pseudorecombinants between bipartite geminiviruses by re assortment of infectious cloned components is generally limited to strains of a particular virus. Following exchange of cloned genomic components of S ida golden mosaic virus (SiGMV/Ho-yv) and Abutilon mosaic virus (AbMV), the pseudorecombinant viruses were infectious in various host plants. The symp tom type of pseudorecombinant virus was in most cases determined by DNA B. However, in some host plants also DNA A of the pseudorecombinant virus was involved in the symptom phenotype.