Abstract
In hybridization experiments using complementary DNA copies, no homology was detected between RNA-3 and either of the genome RNA species of tomato black ring virus. It is estimated that sequences amounting to 160 nucleotide residues shared by RNA-3 and RNA-1, or to 120 nucleotide residues shared by RNA-3 and RNA-2 would have been detected. RNA-3 apparently is a true satellite RNA.