Abstract
Plant-mediated RNA interference (RNAi) can be used to reduce the growth of insect pests, including Myzus persicae (green peach aphid), a prolific pest of numerous dicot crop species. In one approach, viruses that have been engineered to carry an aphid gene fragment are used to infect plants and thereby silence target gene expression in the aphids feeding on these plants, a process called virus-induced gene silencing, or VIGS. Tobacco Rattle Virus (TRV) in the model plant, Nicotiana benthamiana, was the first of many VIGS systems that have been developed for different plant species. In this chapter, we describe a method for silencing M. persicae gene expression using an established TRV-VIGS vector that infects and spreads in N. benthamiana. The two parts of the TRV genome, RNA1 and RNA2, have been cloned into Agrobacterium T-DNA vectors for initiation of plant infections. The RNA2 construct is modified with a Gateway-compatible cloning site to allow insertion of aphid genes. When feeding on TRV-infected N. benthamiana plants, aphids ingest dsRNAs that silence specific target genes. TRV-VIGS of aphid genes allows rapid identification of essential gene targets that can be used for the control of M. persicae by this and other RNAi methods.
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Acknowledgments
We thank Mariko Alexander and Michelle Heck for sharing of a TRV1 Agrobacterium culture, and Robyn Roberts and Greg Martin for providing TRV2-PDS control construct. Thanks to the previous and current members of the Jander lab for their help in developing the aphid TRV-VIGS protocol. This research was supported by US Department of Agriculture Biotechnology Risk Assessment Grant 2017-33522-27006 to G. J.
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Feng, H., Jander, G. (2022). Rapid Screening of Myzus persicae (Green Peach Aphid) RNAi Targets Using Tobacco Rattle Virus. In: Vaschetto, L.M. (eds) RNAi Strategies for Pest Management. Methods in Molecular Biology, vol 2360. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-1633-8_10
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DOI: https://doi.org/10.1007/978-1-0716-1633-8_10
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