title: A potyvirus in nature: indistinct populations.
abstract: Potyviruses occur in nature as a variable population. A number of strains have been reported for many potyviruses. Two or more viruses have been separated from "one virus" isolate. Experimental isolation and/or transmission often results in atypical viral isolates. A virus may be considered as a fuzzy population. We should properly understand the range of variation in one virus. The range of variation as well as typical characteristics of a virus should be included in future descriptions.
authors.affiliation: College of Agricuture, University of Osaka Prefecture, Japan.
authors.forename: S T
authors.initials: ST
authors.lastname: Ohki
mesh_terms: D014644:Genetic Variation; D010942:Plant Viruses / Q000235:genetics*; D012328:RNA Viruses / Q000235:genetics*