Abstract
Southern rice black-streaked dwarf virus (SRBSDV) causes one of the most serious viral diseases of rice in Southeast Asia. A reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed for detection of SRBSDV using total RNA extracted from rice tissues and the insect pest, white-backed planthopper. The assay was based on a set of four primers matching a total of six sequences in the S9 region of SRBSDV genome. Presence of the virus could be detected in RT-LAMP reactions containing 1.2×10(-6)μg of a total RNA extract, which was ten times more sensitive than a classical RT-PCR assay. The SRBSDV could be distinguished from the closely related rice black-streaked dwarf virus (RBSDV) by this method, indicating a high degree of specificity. This simple and sensitive RT-LAMP assay shows potential for detection of SRBSDV in field samples of hosts or vectors at a relatively low cost.
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