Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1047700
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dc.contributor.authorSOUSA, F. F.pt_BR
dc.contributor.authorMENDES, S. M.pt_BR
dc.contributor.authorSANTOS-AMAYA, O. F.pt_BR
dc.contributor.authorARAÚJO, O. G.pt_BR
dc.contributor.authorOLIVEIRA, E. E.pt_BR
dc.contributor.authorPEREIRA, E. J. G.pt_BR
dc.date.accessioned2016-06-22T11:11:11Zpt_BR
dc.date.available2016-06-22T11:11:11Zpt_BR
dc.date.created2016-06-22pt_BR
dc.date.issued2016pt_BR
dc.identifier.citationPlos One, San Francisco, v. 11, n. 5, p. 1-18, May 2016.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1047700pt_BR
dc.descriptionExposure to Bacillus thuringiensis (Bt) toxins in low- and moderate-dose transgenic crops may induce sublethal effects and increase the rate of Bt resistance evolution, potentially compromising control efficacy against target pests. We tested this hypothesis using the fall armyworm Spodoptera frugiperda, a major polyphagous lepidopteran pest relatively tolerant to Bt notorious for evolving field-relevant resistance to single-gene Bt maize. Late-instar larvae were collected from Bt Cry1Ab and non-Bt maize fields in five locations in Brazil, and their offspring was compared for survival, development, and population growth in rearing environment without and with Cry1Ab throughout larval development. Larval survival on Cry1Ab maize leaves varied from 20 to 80% among the populations. Larvae reared on Cry1Ab maize had seven-day delay in development time in relation to control larvae, and such delay was shorter in offspring of armyworms from Cry1Ab maize. Population growth rates were 50?70% lower for insects continuously exposed to Cry1Ab maize relative to controls, showing the population-level effect of Cry1Ab, which varied among the populations and prior exposure to Cry1Ab maize in the field. In three out of five populations, armyworms derived from Bt maize reared on Cry1Ab maize showed higher larval weight, faster larval development and better reproductive performance than the armyworms derived from non-Bt maize, and one of these populations showed better performance on both Cry1Ab and control diets, indicating no fitness cost of the resistance trait. Altogether, these results indicate that offspring of armyworms that developed on field-grown, single-gene Bt Cry1Ab maize had reduced performance on Cry1Ab maize foliage in two populations studied, but in other three populations, these offspring had better overall performance on the Bt maize foliage than that of the armyworms from non-Bt maize fields, possibly because of Cry1Ab resistance alleles in these populations. Implications of these findings for resistance management of S. frugiperda in Bt crops are discussed.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleLife-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2018-01-26T11:11:11Zpt_BR
dc.subject.thesagroLagartapt_BR
dc.subject.thesagroPraga de plantapt_BR
dc.subject.thesagroZea mayspt_BR
riaa.ainfo.id1047700pt_BR
riaa.ainfo.lastupdate2018-01-26 -02:00:00pt_BR
dc.identifier.doi10.1371/journal.pone.0156608pt_BR
dc.contributor.institutionSIMONE MARTINS MENDES, CNPMS.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CNPMS)

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