Properties and strain identity of soybean mosaic virus isolates from the Transvaal, South Africa

The strain identity of 10 soybean mosaic potyvirus (SbMV) isolates from soyabean and one isolate from lupins (<i>Lupinus albus</i>) from the Transvaal, South Africa were determined. The soyabean isolates all constituted a symptom variant of the G1 strain and the SbMV-H31 isolate from lupins was also shown to belong to the SbMV-G1 strain group, albeit as a slight symptom variant. The host range and symptomatology, cytopathology, aphid transmission, particle morphology and length distribution and coat protein molecular mass of SbMV-86/20, one of the soyabean isolates, were similar to that of SbMV-H31. The 2 isolates were serologically identical