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| Content Provider | Springer Nature Link |
|---|---|
| Author | Bachman, Pamela M. Bolognesi, Renata Moar, William J. Mueller, Geoffrey M. Paradise, Mark S. Ramaseshadri, Parthasarathy Tan, Jianguo Uffman, Joshua P. Warren, JoAnne Wiggins, B. Elizabeth Levine, Steven L. |
| Copyright Year | 2013 |
| Abstract | The sequence specificity of the endogenous RNA interference pathway allows targeted suppression of genes essential for insect survival and enables the development of durable and efficacious insecticidal products having a low likelihood to adversely impact non-target organisms. The spectrum of insecticidal activity of a 240 nucleotide (nt) dsRNA targeting the Snf7 ortholog in Western Corn Rootworm (WCR; Diabrotica virgifera virgifera) was characterized by selecting and testing insects based upon their phylogenetic relatedness to WCR. Insect species, representing 10 families and 4 Orders, were evaluated in subchronic or chronic diet bioassays that measured potential lethal and sublethal effects. When a specific species could not be tested in diet bioassays, the ortholog to the WCR Snf7 gene (DvSnf7) was cloned and corresponding dsRNAs were tested against WCR and Colorado potato beetle (Leptinotarsa decemlineata); model systems known to be sensitive to ingested dsRNA. Bioassay results demonstrate that the spectrum of activity for DvSnf7 is narrow and activity is only evident in a subset of beetles within the Galerucinae subfamily of Chrysomelidae (>90 % identity with WCR Snf7 240 nt). This approach allowed for evaluating the relationship between minimum shared nt sequence length and activity. A shared sequence length of ≥21 nt was required for efficacy against WCR (containing 221 potential 21-nt matches) and all active orthologs contained at least three 21 nt matches. These results also suggest that WCR resistance to DvSnf7 dsRNA due to single nucleotide polymorphisms in the target sequence of 240 nt is highly unlikely. |
| Starting Page | 1207 |
| Ending Page | 1222 |
| Page Count | 16 |
| File Format | |
| ISSN | 09628819 |
| Journal | Transgenic Research |
| Volume Number | 22 |
| Issue Number | 6 |
| e-ISSN | 15739368 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2013-06-08 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | RNAi Specificity Coleoptera Activity spectrum Non-target organism Molecular Medicine Plant Genetics & Genomics Animal Genetics and Genomics Plant Sciences Human Genetics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Animal Science and Zoology Biotechnology Agronomy and Crop Science |
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