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Genetics

Relationships Between Strains of Tobacco Mosaic Virus and Other Selected Plant Viruses. Michael J. Van De Walle, Former graduate student, Department of Biological Sciences, Wayne State University, Detroit, MI 48202, Present address of the senior author: Department of Immunology and Microbiology, University of Florida, Gainesville 32611; Albert Siegel, professor, Department of Biological Sciences, Wayne State University, Detroit, MI 48202. Phytopathology 72:390-395. . Copyright 1982 The American Phytopathological Society. DOI: 10.1094/Phyto-72-390.

Sixteen strains of tobacco mosaic virus (TMV) and 17 strains from nine other plant virus groups were compared for nucleotide sequence homology by RNA-complementary DNA hybridization. The two subgroups of TMV having capsid proteins that are the most alike were found to have approximately 15% of their genomes in common, but no sequence homology between the other subgroups could be detected by this test. Differences were not detected between the nucleotide sequences of strains within a TMV subgroup, nor was sequence homology found among three comoviruses or between two potyviruses.