Abstract
The sequence homologies beween the RNA genomes for seven European and one North American isolate of cherry leaf roll virus (CLRV)were compared using cDNA hybridization analysis. A high degree of homology (85 to 95%) was detected between birch and cherry isolates of the virus, but lower levels of homology (46 to 48%) were inferred when these were compared with a rhubarb or a North American dogwood isolate of CLRV.