Molecular analysis of soybean dwarf virus isolates in the eastern United States confirms the presence of both D and Y strains and provides evidence of mixed infections and recombination.
Soybean dwarf virus (SbDV), first identified as an agricultural problem in Japan, has emerged as a growing problem in the Midwestern United States. The majority of research on SbDV had been limited to four lab maintained strains from Japan. SbDV had been found in clover in the eastern United States, but these isolates rarely emerged into soybeans. These isolates were analyzed by multiplex PCR and sequencing, revealing that some were infections of both Y and D components, including a recombinant subisolate. Phylogenetic analyses for the US isolates revealed a broad diversity of SbDV, with selection pressure greater on the movement protein than the coat protein. The field isolates from the Eastern United States showed differences in symptoms, aphid transmission and host range, demonstrating that a study of field isolates is an important complement to laboratory maintained strains in understanding the biology and evolution of plant viruses.
USDA-ARS Foreign Disease Weed Science Research Unit, U.S. Department of Agriculture, 1301 Ditto Avenue, Fort Detrick, MD 21702, USA. william.schneider@ars.usda.gov
William L
WL
Schneider
Vernon D
VD
Damsteegt
Andrew L
AL
Stone
Micki
M
Kuhlmann
Britt A
BA
Bunyard
Diana J
DJ
Sherman
Michael V
MV
Graves
Gary
G
Smythers
Oney P
OP
Smith
Efstathios
E
Hatziloukas
D000818:Animals; D001042:Aphids / Q000821:virology; D016000:Cluster Analysis; D014644:Genetic Variation; D005838:Genotype; D058507:Host Specificity; D017793:Luteovirus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D029902:Medicago / Q000821:virology*; D008969:Molecular Sequence Data; D010802:Phylogeny; D010935:Plant Diseases / Q000821:virology*; D016133:Polymerase Chain Reaction; D012367:RNA, Viral / Q000235:genetics*; D011995:Recombination, Genetic; D017422:Sequence Analysis, DNA; D017385:Sequence Homology; D013025:Glycine max / Q000821:virology*; D014481:United States
D012367:RNA, Viral