Taxonomy of several tobamoviruses from China as determined by molecular hybridization analysis with complementary DNA.

Molecular hybridization analysis (MHA) was used to show that several tobamoviruses isolated in China (namely Populus bushy top virus, Dihuang degeneration virus, common tobacco mosaic virus, tomato mosaic virus and a mutant of tomato mosaic) are closely related to the U1 strain of tobacco mosaic virus (TMV-U1). Youcai mosaic virus from rape is a distinct virus unrelated by MHA to the TMV-U1 group or to several other definitive representatives of the tobamoviruses.