Abstract
Virus-induced gene silencing (VIGS) is a powerful technology for rapidly and transiently knocking down the expression of plant genes to study their functions. A VIGS vector for maize derived from Foxtail mosaic virus (FoMV), a positive-sense single-stranded RNA virus, was recently developed. A cloning site created near the 3' end of the FoMV genome enables insertion of 200-400 nucleotide fragments of maize genes targeted for silencing. The recombinant FoMV clones are inoculated into leaves of maize seedlings by biolistic particle delivery, and silencing is typically observed within 2 weeks after inoculation. This chapter provides a protocol for constructing FoMV VIGS clones and inoculating them into maize seedlings.
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