Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.

Detalhes bibliográficos
Autor(a) principal: SOUSA, F. F.
Data de Publicação: 2016
Outros Autores: MENDES, S. M., SANTOS-AMAYA, O. F., ARAÚJO, O. G., OLIVEIRA, E. E., PEREIRA, E. J. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1047700
Resumo: Exposure 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.
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spelling Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.LagartaPraga de plantaZea maysExposure 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.SIMONE MARTINS MENDES, CNPMS.SOUSA, F. F.MENDES, S. M.SANTOS-AMAYA, O. F.ARAÚJO, O. G.OLIVEIRA, E. E.PEREIRA, E. J. G.2016-06-22T11:11:11Z2016-06-22T11:11:11Z2016-06-2220162018-01-26T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePlos One, San Francisco, v. 11, n. 5, p. 1-18, May 2016.http://www.alice.cnptia.embrapa.br/alice/handle/doc/104770010.1371/journal.pone.0156608enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-15T23:24:32Zoai:www.alice.cnptia.embrapa.br:doc/1047700Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-15T23:24:32falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-15T23:24:32Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
title Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
spellingShingle Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
SOUSA, F. F.
Lagarta
Praga de planta
Zea mays
title_short Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
title_full Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
title_fullStr Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
title_full_unstemmed Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
title_sort Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.
author SOUSA, F. F.
author_facet SOUSA, F. F.
MENDES, S. M.
SANTOS-AMAYA, O. F.
ARAÚJO, O. G.
OLIVEIRA, E. E.
PEREIRA, E. J. G.
author_role author
author2 MENDES, S. M.
SANTOS-AMAYA, O. F.
ARAÚJO, O. G.
OLIVEIRA, E. E.
PEREIRA, E. J. G.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv SIMONE MARTINS MENDES, CNPMS.
dc.contributor.author.fl_str_mv SOUSA, F. F.
MENDES, S. M.
SANTOS-AMAYA, O. F.
ARAÚJO, O. G.
OLIVEIRA, E. E.
PEREIRA, E. J. G.
dc.subject.por.fl_str_mv Lagarta
Praga de planta
Zea mays
topic Lagarta
Praga de planta
Zea mays
description Exposure 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.
publishDate 2016
dc.date.none.fl_str_mv 2016-06-22T11:11:11Z
2016-06-22T11:11:11Z
2016-06-22
2016
2018-01-26T11:11:11Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Plos One, San Francisco, v. 11, n. 5, p. 1-18, May 2016.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1047700
10.1371/journal.pone.0156608
identifier_str_mv Plos One, San Francisco, v. 11, n. 5, p. 1-18, May 2016.
10.1371/journal.pone.0156608
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/1047700
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
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