Gene Flow Accelerates Local Adaptation Among Finite Populations: Simulating the Evolution of Insecticide Resistance

Caprio, Michael A.; Tabashnik, Bruce E.

doi:10.1093/jee/85.3.611

Cited by 152 publications

(112 citation statements)

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“…The landscape-level effects of the resistant populations identified in this study will depend on gene flow, fitness trade-offs that accompany resistance, and selection intensity [26,27,28,29]. Current trends in planting of Bt crops suggest that intense selection for resistance in the field will continue [1].…”

Section: Discussionmentioning

confidence: 99%

Field-evolved resistance to Bt maize by western corn rootworm

Gassmann¹

2016

2016 International Congress of Entomology

196

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Background: Crops engineered to produce insecticidal toxins derived from the bacterium Bacillus thuringiensis (Bt) are planted on millions of hectares annually, reducing the use of conventional insecticides and suppressing pests. However, the evolution of resistance could cut short these benefits. A primary pest targeted by Bt maize in the United States is the western corn rootworm Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae).

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Section: Discussionmentioning

confidence: 99%

Field-evolved resistance to Bt maize by western corn rootworm

Gassmann¹

2016

2016 International Congress of Entomology

196

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“…The use of discriminatory markers capable of identifying migrants permits quantification of the number of genes exchanged between populations. In the context of insect resistance, gene flow is the most potent evolutionary force for spreading resistant alleles throughout over the pest populations (Caprio et al, 1992). In addition, understanding the patterns of genetic structure and gene flow can provide guidance for designing superior management programs for S. frugiperda resistant to insecticides and genetically modified crops.…”

Section: Discussionmentioning

confidence: 99%

Methodology Microsatellite markers for genetic studies of the fall armyworm, Spodoptera frugiperda

Pavinato¹,

Martinelli²,

Lima³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. We developed six microsatellite markers for the fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae). The SSR loci were isolated with enriched genomic library protocol by using native individuals as a genome source for markers. These loci were characterized in 48 individuals and they were tested for the ability to identify candidate migrants exchanged among the samples. The number of alleles per locus ranged from 5 to 18 (10.8 on average). The observed polymorphism information content ranged from 0.172 to 0.891. Beside the lower efficiency to obtain SSR loci, the six microsatellites were polymorphic and sufficiently discriminant for the genetic studies of S. frugiperda; it allowed us to identify migrants with both NJ clustering and the Bayesian methods. These markers will be useful for molecular SSRs for genetic studies of fall armyworm ecology studies of this highly polyphagous species in order to understand the processes that determine genetic differentiation in the complex agro-ecosystems that it infests and improve local integrated pest management practices.

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“…kurstaki resistance, resistance has corresponded to one or a few major loci (6,13,29,43). The primary method currently used to determine the number of loci involved in resistance compares backcross results to mortalities predicted from a monogenic model.…”

Section: Discussionmentioning

confidence: 99%

Inheritance of Resistance to Bacillus thuringiensis subsp. kurstaki in Trichoplusia ni

Janmaat

Wang

Kain

et al. 2004

Appl Environ Microbiol

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The genetic inheritance of resistance to a commercial formulation of Bacillus thuringiensis subsp. kurstaki was examined in a Trichoplusia ni colony initiated from a resistant population present in a commercial vegetable greenhouse in British Columbia, Canada. Progeny of F 1 reciprocal crosses and backcrosses between F 1 larvae and resistant (P R ) and susceptible (P S ) populations were assayed at different B. thuringiensis subsp. kurstaki concentrations. The responses of progeny of reciprocal F 1 crosses were identical, indicating that the resistant trait was autosomal. The 50% lethal concentration for the F 1 larvae was slightly higher than that for P S , suggesting that resistance is partially recessive. The responses of both backcross progeny (F 1 ؋ P R , F 1 ؋ P S ) did not correspond to predictions from a single-locus model. The inclusion of a nonhomozygous resistant parental line in the monogenic model significantly increased the correspondence between the expected and observed results for the F 1 ؋ P R backcross but decreased the correspondence with the F 1 ؋ P S backcross results. This finding suggests that resistance to B. thuringiensis subsp. kurstaki in this T. ni population is due to more than one gene.

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Gene Flow Accelerates Local Adaptation Among Finite Populations: Simulating the Evolution of Insecticide Resistance

Cited by 152 publications

References 0 publications

Field-evolved resistance to Bt maize by western corn rootworm

Field-evolved resistance to Bt maize by western corn rootworm

Methodology Microsatellite markers for genetic studies of the fall armyworm, Spodoptera frugiperda

Inheritance of Resistance to Bacillus thuringiensis subsp. kurstaki in Trichoplusia ni

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