2008
DOI: 10.1111/j.1439-0418.2008.01279.x
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Characterizing laboratory colonies of western corn rootworm (Coleoptera: Chrysomelidae) selected for survival on maize containing event DAS‐59122‐7

Abstract: Event DAS‐59122‐7 is a novel transgenic trait designed to protect the roots and yield potential of maize from the insect pest corn rootworm Diabrotica spp. (Col.: Chrysomelidae). The increased pest status of corn rootworm, exceptional efficacy of this trait, and anticipated increases in farm efficiency and grower and environmental safety will drive adoption of this trait. Strong grower acceptance of this trait highlights the importance of science‐based and practical resistance management strategies. A non‐diap… Show more

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Cited by 94 publications
(148 citation statements)
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“…Thus, adult production on Bt corn increased from 1.5% for F1 to 5.5% for F6, an increase of about 3.7-fold in six generations of selection. One reason that the increase in survival to the adult stage may not have increased as rapidly in the current study as the 58.5-fold increase found in Lefko, et al (20) is that relative to isoline survival, we already had a high rate of survival on Bt corn under our greenhouse rearing conditions (approximately 25% relative to isoline compared to 1-4% relative to isoline survival in the field).…”
Section: Resultsmentioning
confidence: 58%
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“…Thus, adult production on Bt corn increased from 1.5% for F1 to 5.5% for F6, an increase of about 3.7-fold in six generations of selection. One reason that the increase in survival to the adult stage may not have increased as rapidly in the current study as the 58.5-fold increase found in Lefko, et al (20) is that relative to isoline survival, we already had a high rate of survival on Bt corn under our greenhouse rearing conditions (approximately 25% relative to isoline compared to 1-4% relative to isoline survival in the field).…”
Section: Resultsmentioning
confidence: 58%
“…Genes with small effects are often common in populations and response to selection can be very rapid (18,19). Root growing points are higher in total soluble protein compared to older root tissue; Cry34Ab1ϩCry35Ab1 (20) and Cry3Bb1 proteins also follow this profile (T. Vaughn, personal communication). Interestingly, behavioral responses to toxins can prevent and even decrease the levels of physiological resistance in insect populations (21), an important result suggested by previous modeling work (22).…”
Section: Resultsmentioning
confidence: 99%
“…After one and six generations of selection, the mean population Þtness (number of adults divided by number of hatched eggs) was Ϸ0.03 and 0.20, respectively, relative to emergence on isoline corn. Lefko et al (2008) observed 0.004 and 0.013 survival in two colonies during the Þrst generation on Cry34/35Ab1 corn in a laboratory experiment. Storer et al (2006) observed 0.03, 0.04, and 0.006 relative survival rates in Þeld studies comparing Cry34/35Ab1 corn plots to non-Bt corn plots.…”
Section: Model Analysismentioning
confidence: 99%
“…We used the following model to visually Þt a curve to observations of mean population Þtness (e.g., larval survival or adult emergence on transgenic corn relative to the same on isoline corn). Given a single locus with two alleles, r for resistance and s for susceptibility, the generational change in resistance-allele frequency is as follows: Lefko et al (2008) observed evolution of resistance in two colonies reared on Cry34/35Ab1 corn over 11 generations on corn seedlings in the laboratory. After one and six generations of selection, the mean population Þtness (number of adults divided by number of hatched eggs) was Ϸ0.03 and 0.20, respectively, relative to emergence on isoline corn.…”
Section: Model Analysismentioning
confidence: 99%
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