Spontaneous deletion mutants from non-inoculated upper leaves of oat plants inoculated with CP-EGFP and CPdelta-EGFP. Wt CfMV–the 3′ end organisation of CfMV genome. Rec. CfMV group I–group of recombinant viruses which had lost CfMV nt from 3244-3253 to 3864 of the RdRp and CP genes along with the EGFP sequence. Rec. CfMV group II–group of recombinants which had lost CfMV nt from 3831-3854 to 3864-3868 of the CP cistron together with EGFP sequence. The numbering corresponds to the nucleotides in wt CfMV genome.