Independent action between DvSnf7 RNA and Cry3Bb1 protein in southern corn rootworm, Diabrotica undecimpunctata howardi and Colorado potato beetle, Leptinotarsa decemlineata
Open accessAbstract
In recent years, corn rootworm (CRW)-resistant maize events producing two or more CRW-active Bt proteins have been commercialized to enhance efficacy against the target pest(s) by providing multiple modes of action (MoA). The maize hybrid MON 87411 has been developed that produces the CRW-active Cry3Bb1 Bt protein (hereafter Cry3Bb1) and expresses a RNAi-mediated MoA that also targets CRW. As part of an environmental risk assessment for MON 87411, the potential for an interaction between the CRW-active DvSnf7 RNA (hereafter DvSnf7) and Cry3Bb1 was assessed in 12-day diet incorporation bioassays with the southern corn rootworm (SCR, Diabrotica undecimpunctata howardi). The potential for an interaction between DvSnf7 and Cry3Bb1 was evaluated with two established experimental approaches. The first approach evaluated each substance alone and in combination over three different response levels. For all three response levels, observed responses were shown to be additive and not significantly different from predicted responses under the assumption of independent action. The second approach evaluated the potential for a fixed sub-lethal concentration of Cry3Bb1 to decrease the median lethal concentration (LC50) of DvSnf7 and vice-versa. With this approach, the LC50 value of DvSnf7 was not altered by a sub-lethal concentration of Cry3Bb1 and vice-versa. In addition, the potential for an interaction between the Cry3Bb1 and DvSnf7 was tested with Colorado potato beetle (CPB, Leptinotarsa decemlineata), which is sensitive to Cry3Bb1 but not DvSnf7. CPB assays also demonstrated that DvSnf7 does not alter the activity of Cry3Bb1. The results from this study provide multiple lines of evidence that DvSnf7 and Cry3Bb1 produced in MON 87411 have independent action.
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Recent studies have demonstrated that the lack of unexpected effects is also true for a combination of Cry proteins and dsRNA.
“Recent studies have demonstrated that this is also true for a combination of Cry proteins and dsRNA (Khajuria et al., 2018;Levine et al., 2015;Ni et al., 2017).”
From Genetically engineered crops help support conservation biological control (2019) · cites this paper as Levine et al., 2015
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- Authors
- Levine, S. L., Tan, J., Mueller, G. M., Bachman, P. M., Jensen, P. D., & Uffman, J. P.
- Affiliations
- Monsanto (United States) (US)
- Corresponding author
- Levine, Steven L.
- Tan, Jianguo
- Venue
- PLoS ONE
- Publisher
- Public Library of Science (PLoS)
- Published
- 2015-03-03
- Volume
- 10
- Issue
- 3
- Pages
- e0118622
- ISSN
- 1932-6203 (ISSN-L)
- PMC
- PMC4348175
- OpenAlex
- W2022473987
- Cited by
- 45
- References
- 40
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 5 · 2019: 6 · 2018: 5 · 2017: 5 · 2016: 5 · 2015: 2
- FWCI
- 2.46
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- PLoS ONE (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Insect Resistance and Genetics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetically Modified Organisms Research
- Life Sciences › Agricultural and Biological Sciences › Insect Science › Insect-Plant Interactions and Control
- Keywords
- Cry3Bb1, Diabrotica undecimpunctata howardi, Colorado potato beetle, Bt maize, RNA interference, independent action, mechanism of action, sublethal effects, additive interaction, insecticidal proteins, environmental risk assessment
- MeSH terms
- Animals, Coleoptera, Chimera, Zea mays, Endotoxins, Larva, Pest Control, Biological, Solanum tuberosum, Gene Expression, Transgenes, Plants, Genetically Modified, RNA, Small Interfering
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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