The Spectra of Variants in Potyvirus Populations
Little data are available for the plant viruses. This proposal is aimed at obtaining information on sequence diversity in certain populations of legume-infecting potyviruses, and determining the nucleotide substitution frequencies in these populations. The extent and nature of nucleotide sequence variants in populations of certain legume-infecting potyviruses will be examined. This project will determine how and at what rate population structure may shift, over time, in response to selective pressures, such as host plant resistance. Understanding the nature of potyvirus evolution will provide insights as to how these viruses may respond to various environmental and selective factors in nature.