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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
22/06/2016 |
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Data da última atualização: |
26/01/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOUSA, F. F.; MENDES, S. M.; SANTOS-AMAYA, O. F.; ARAÚJO, O. G.; OLIVEIRA, E. E.; PEREIRA, E. J. G. |
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Afiliação: |
SIMONE MARTINS MENDES, CNPMS. |
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Título: |
Life-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Plos One, San Francisco, v. 11, n. 5, p. 1-18, May 2016. |
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DOI: |
10.1371/journal.pone.0156608 |
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Idioma: |
Inglês |
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Conteúdo: |
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. MenosExposure 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 Cry... Mostrar Tudo |
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Thesagro: |
Lagarta; Praga de planta; Zea mays. |
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Categoria do assunto: |
O Insetos e Entomologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/144678/1/Life-history.pdf
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Marc: |
LEADER 02778naa a2200229 a 4500
001 2047700
005 2018-01-26
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1371/journal.pone.0156608$2DOI
100 1 $aSOUSA, F. F.
245 $aLife-history traits of Spodoptera frugiperda populations exposed to low-dose Bt maize.$h[electronic resource]
260 $c2016
520 $aExposure 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.
650 $aLagarta
650 $aPraga de planta
650 $aZea mays
700 1 $aMENDES, S. M.
700 1 $aSANTOS-AMAYA, O. F.
700 1 $aARAÚJO, O. G.
700 1 $aOLIVEIRA, E. E.
700 1 $aPEREIRA, E. J. G.
773 $tPlos One, San Francisco$gv. 11, n. 5, p. 1-18, May 2016.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
11/01/2011 |
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Data da última atualização: |
08/05/2023 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Autoria: |
GONCALVES, R. C.; ALVARES, V. de S.; CARTAXO, C. B. da C.; WADT, L. H. de O.; SOUZA, J. M. L. de; LIMA, A. C. de; COSTA, D. A. da; GIACOMELLI, M.; MAGALHÃES, K. da S.; MADRUGA, A. L. S. |
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Afiliação: |
RIVADALVE COELHO GONCALVES, CPAF-AC; VIRGINIA DE SOUZA ALVARES, CPAF-AC; CLEISA BRASIL DA CUNHA CARTAXO, CPAF-AC; LUCIA HELENA DE OLIVEIRA WADT, CPAF-AC; JOANA MARIA LEITE DE SOUZA, CPAF-AC; ANGÉLICA COSTA DE LIMA, BOLSISTA EMBRAPA ACRE; DAVID AQUINO DA COSTA, BOLSISTA EMBRAPA ACRE; MUREL GIACOMELLI, BOLSISTA EMBRAPA ACRE; KÉTILA DA SILVA MAGALHÃES, BOLSISTA EMBRAPA ACRE; AILSON LUIZ SUDAN MADRUGA, CPAF-AC. |
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Título: |
Secador estacionário a ar aquecido forçado artificialmente: inovação tecnológica na secagem de sementes de castanheira-da-amazônia (Bertholletia excelsa). |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Rio Branco, AC: Embrapa Acre, 2010. |
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Páginas: |
4 p. |
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Série: |
(Embrapa Acre. Comunicado técnico, 174). |
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ISSN: |
0100-8668 |
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Idioma: |
Português |
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Conteúdo: |
Com o objetivo de disponibilizar uma tecnologia propícia para a secagem de sementes no local de coleta que tiver energia hidroelétrica ou por motor estacionário, foi estudada na Embrapa Acre a eficiência de três secadores de sementes de castanheira-da-amazônia, sendo dois por convecção natural de ar à sombra e ao sol, respectivamente, e um secador a ar aquecido forçado artificialmente (SAAA). |
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Palavras-Chave: |
Aflatoxinas; Calidad de la fruta; Cáscaras de fruta; Castanha do brasil; Micotoxinas; Nuez del Brasil; Secador estacionário; Secadores de convección; Secagem natural; Temperatura de secado. |
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Thesagro: |
Aflatoxina; Aspergillus flavus; Bertholletia excelsa; Casca; Castanha do pará; Contaminação fúngica; Fruto; Micotoxina; Propriedade físico-química; Qualidade; Resistência a temperatura; Secagem artificial. |
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Thesaurus NAL: |
Aflatoxins; Brazil nuts; Convection dryers; Drying temperature; Fruit peels; Fruit quality; Fungi; Mycotoxins. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/30874/1/COT-174.pdf
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Marc: |
LEADER 02205nam a2200613 a 4500
001 1872684
005 2023-05-08
008 2010 bl uuuu u0uu1 u #d
022 $a0100-8668
100 1 $aGONCALVES, R. C.
245 $aSecador estacionário a ar aquecido forçado artificialmente$binovação tecnológica na secagem de sementes de castanheira-da-amazônia (Bertholletia excelsa).$h[electronic resource]
260 $aRio Branco, AC: Embrapa Acre$c2010
300 $a4 p.
490 $a(Embrapa Acre. Comunicado técnico, 174).
520 $aCom o objetivo de disponibilizar uma tecnologia propícia para a secagem de sementes no local de coleta que tiver energia hidroelétrica ou por motor estacionário, foi estudada na Embrapa Acre a eficiência de três secadores de sementes de castanheira-da-amazônia, sendo dois por convecção natural de ar à sombra e ao sol, respectivamente, e um secador a ar aquecido forçado artificialmente (SAAA).
650 $aAflatoxins
650 $aBrazil nuts
650 $aConvection dryers
650 $aDrying temperature
650 $aFruit peels
650 $aFruit quality
650 $aFungi
650 $aMycotoxins
650 $aAflatoxina
650 $aAspergillus flavus
650 $aBertholletia excelsa
650 $aCasca
650 $aCastanha do pará
650 $aContaminação fúngica
650 $aFruto
650 $aMicotoxina
650 $aPropriedade físico-química
650 $aQualidade
650 $aResistência a temperatura
650 $aSecagem artificial
653 $aAflatoxinas
653 $aCalidad de la fruta
653 $aCáscaras de fruta
653 $aCastanha do brasil
653 $aMicotoxinas
653 $aNuez del Brasil
653 $aSecador estacionário
653 $aSecadores de convección
653 $aSecagem natural
653 $aTemperatura de secado
700 1 $aALVARES, V. de S.
700 1 $aCARTAXO, C. B. da C.
700 1 $aWADT, L. H. de O.
700 1 $aSOUZA, J. M. L. de
700 1 $aLIMA, A. C. de
700 1 $aCOSTA, D. A. da
700 1 $aGIACOMELLI, M.
700 1 $aMAGALHÃES, K. da S.
700 1 $aMADRUGA, A. L. S.
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Embrapa Acre (CPAF-AC) |
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