Properties of Strains of Sweet potato feathery mottle virus and Two Newly Recognized Potyviruses Infecting Sweet Potato in the United States

Some biological and molecular properties of six potyvirus isolates (LSU-1, -2, -3, and -5; 95-2; and 95-6) from sweet potato (Ipomoea batatas) were evaluated. Isolates LSU-1 and -3 and 95-2 were transmitted by Aphis gossypii and Myzus persicae while LSU-2 and -5 were not transmitted by either aphid. The partial nucleotide sequence of the nuclear inclusion b (NIb) and the coat protein (CP) genes of these six isolates were compared with the...