One gene versus two: A regional study on the efficacy of single gene versus pyramided resistance for soybean aphid management

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Show simple item record Mccarville, M. T. O’Neal, M. E. Potter, B. D. Tilmon, K. J. Cullen, E. M. McCornack, Brian P. Tooker, J. F. Prischmann-Voldseth, D. A. 2014-12-03T12:48:29Z 2014-12-03T12:48:29Z 2014-12-03
dc.description.abstract The soybean aphid (Aphis glycines Matsumura) is a threat to soybean production in the Midwestern United States. Varieties containing the Rag1 soybean aphid resistance gene have been released with limited success in reducing aphid populations. Furthermore, virulent biotypes occur within North America and challenge the durability of single-gene resistance. Pyramiding resistance genes has the potential to improve aphid population suppression and increase resistance gene durability. Our goal was to determine if a pyramid could provide improved aphid population suppression across a wide range of environments.Weconducted a small-plot Þeld experiment across seven states and three years. We compared soybean near-isolines for the Rag1 or Rag2 gene, and a pyramid line containing both genes for their ability to decrease aphid pressure and protect yield compared with a susceptible line. These lines were evaluated both with and without a neonicitinoid seed treatment. All aphid-resistant lines signiÞcantly decreased aphid pressure at all locations but one. The pyramid line experienced lower aphid pressure than both single-gene lines at eight of 23 location-years. Soybean aphids signiÞcantly reduced soybean yield for the susceptible line by 14% and for both single-gene lines by 5%; however, no signiÞcant yield decrease was observed for the pyramid line. The neonicitinoid seed treatment reduced plant exposure to aphids across all soybean lines, but did not provide signiÞcant yield protection for any of the lines. These results demonstrate that pyramiding resistance genes can provide sufÞcient and consistent yield protection from soybean aphid in North America. en_US
dc.language.iso en_US en_US
dc.relation.uri en_US
dc.rights This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America. Permission to archive granted by Entomological Society of America, Oct. 27, 2014. en_US
dc.subject Host-plant resistance en_US
dc.subject Integrated pest management (IPM) en_US
dc.subject Insect resistance management en_US
dc.subject Insecticidal seed treatment en_US
dc.subject Areawide management en_US
dc.title One gene versus two: A regional study on the efficacy of single gene versus pyramided resistance for soybean aphid management en_US
dc.type Article (publisher version) en_US 2014 en_US
dc.citation.doi 10.1603/EC14047 en_US
dc.citation.epage 1687 en_US
dc.citation.issue 4 en_US
dc.citation.jtitle Journal of Economic Entomology en_US
dc.citation.spage 1680 en_US
dc.citation.volume 107 en_US
dc.contributor.authoreid mccornac en_US

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