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Viruses 2017, 9(6), 155; doi:10.3390/v9060155

Host Adaptation of Soybean Dwarf Virus Following Serial Passages on Pea (Pisum sativum) and Soybean (Glycine max)

1
Department of Plant Pathology, The Pennsylvania State University, University Park, PA 16802, USA
2
USDA-ARS Foreign Disease Weed Science Research Unit, Fort Detrick, MD 21702, USA
3
Department of Plant Pathology, Kansas State University, Manhattan, KS 66506, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Andrew White
Received: 26 May 2017 / Revised: 15 June 2017 / Accepted: 16 June 2017 / Published: 21 June 2017
(This article belongs to the Section Viruses of Plants, Fungi and Protozoa)
View Full-Text   |   Download PDF [1855 KB, uploaded 21 June 2017]   |  

Abstract

Soybean Dwarf Virus (SbDV) is an important plant pathogen, causing economic losses in soybean. In North America, indigenous strains of SbDV mainly infect clover, with occasional outbreaks in soybean. To evaluate the risk of a US clover strain of SbDV adapting to other plant hosts, the clover isolate SbDV-MD6 was serially transmitted to pea and soybean by aphid vectors. Sequence analysis of SbDV-MD6 from pea and soybean passages identified 11 non-synonymous mutations in soybean, and six mutations in pea. Increasing virus titers with each sequential transmission indicated that SbDV-MD6 was able to adapt to the plant host. However, aphid transmission efficiency on soybean decreased until the virus was no longer transmissible. Our results clearly demonstrated that the clover strain of SbDV-MD6 is able to adapt to soybean crops. However, mutations that improve replication and/or movement may have trade-off effects resulting in decreased vector transmission. View Full-Text
Keywords: Soybean Dwarf Virus; trade-off effect; aphid transmission; soybean aphid; adaptation; genome sequencing Soybean Dwarf Virus; trade-off effect; aphid transmission; soybean aphid; adaptation; genome sequencing
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MDPI and ACS Style

Tian, B.; Gildow, F.E.; Stone, A.L.; Sherman, D.J.; Damsteegt, V.D.; Schneider, W.L. Host Adaptation of Soybean Dwarf Virus Following Serial Passages on Pea (Pisum sativum) and Soybean (Glycine max). Viruses 2017, 9, 155.

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