Inheritance Patterns, Dominance and Cross-Resistance of Cry1Ab- and Cry1Ac-Selected Ostrinia furnacalis (Guenée)

Zhang, Tiantao; He, Maoxian; Gatehouse, Angharad M. R.; Wang, Zhenying; Edwards, Martin G.; Li, Qing; He, Kanglai

doi:10.3390/toxins6092694

Cited by 46 publications

(50 citation statements)

References 47 publications

(48 reference statements)

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“…It was found that a transgenic maize line expressing cry1Ie was highly resistant against the stem borer O. furnacalis [24]. In addition, it appears that the Cry1Ie protein has no cross-resistance with other Lepidoptera-active insecticidal proteins such as Cry1Ab, Cry1Ac, Cry1Ah, or Cry1F [25,26,27], making it a suitable candidate gene for developing stacked events for improved pest control. However, our knowledge regarding the potential effects of the Cry1Ie protein on non-target beneficial arthropods is still limited.…”

Section: Discussionmentioning

confidence: 99%

Consumption of Bt Maize Pollen Containing Cry1Ie Does Not Negatively Affect Propylea japonica (Thunberg) (Coleoptera: Coccinellidae)

Liu

et al. 2017

Toxins

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Propylea japonica (Thunberg) (Coleoptera: Coccinellidae) are prevalent predators and pollen feeders in East Asian maize fields. They are therefore indirectly (via prey) and directly (via pollen) exposed to Cry proteins within Bt-transgenic maize fields. The effects of Cry1Ie-producing transgenic maize pollen on the fitness of P. japonica was assessed using two dietary-exposure experiments in the laboratory. In the first experiment, survival, larval developmental time, adult fresh weight, and fecundity did not differ between ladybirds consuming Bt or non-Bt maize pollen. In the second experiment, none of the tested lethal and sublethal parameters of P. japonica were negatively affected when fed a rapeseed pollen-based diet containing Cry1Ie protein at 200 μg/g dry weight of diet. In contrast, the larval developmental time, adult fresh weight, and fecundity of P. japonica were significantly adversely affected when fed diet containing the positive control compound E-64. In both experiments, the bioactivity of the Cry1Ie protein in the food sources was confirmed by bioassays with a Cry1Ie-sensitive lepidopteran species. These results indicated that P. japonica are not affected by the consumption of Cry1Ie-expressing maize pollen and are not sensitive to the Cry1Ie protein, suggesting that the growing of Bt maize expressing Cry1Ie protein will pose a negligible risk to P. japonica.

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Section: Discussionmentioning

confidence: 99%

Consumption of Bt Maize Pollen Containing Cry1Ie Does Not Negatively Affect Propylea japonica (Thunberg) (Coleoptera: Coccinellidae)

Liu

et al. 2017

Toxins

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“…Cry1Ab + Cry1Fa corn and Cry1Ac + Cry1Fa cotton pyramids had been planted against O. nubilalis , O. furnacalis , H. zea , H. armigera , and so on (Carriète et al, ). However, significant cross‐resistance had been found in O. nubilalis (Crespo et al, ; Pereira, Lang, Storer, & Siegfried, ; Siqueira, Moellenbeck, Spencer, & Siegfried, ; Xu et al, ; T. Zhang et al, ), O. furnacalis (Wang, Zhang et al, , Wang, Wang et al, ), S. exigua (Hernández‐Martínez, Ferré, & Escriche, ), P. xylostella (Y. B. Liu, Tabashnik, Meyer, & Crickmore, ; Tabashnik, Johnson, Engleman, & Baum, ), T. ni (Cao, Tang, Strizhov, Shelton, & Earle, ; Cao, Zhao, Tang, Shelton, & Earle, ; P. Wang et al, ), and H. virescens (Gould, Anderson, Reynolds, Bumgarner, & Moar, ).…”

Section: Cross‐resistance Among Cry1 Toxinsmentioning

confidence: 99%

The progress in insect cross‐resistance among Bacillus thuringiensis toxins

Wei

Zhang

2019

Arch Insect Biochem Physiol

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Bt crop pyramids produce two or more Bt proteins active to broaden the spectrum of action and to delay the development of resistance in exposed insect populations. The crossresistance between Bt toxins is a vital restriction factor for Bt crop pyramids, which may reduce the effect of pyramid strategy. In this review, the status of the cross-resistance among more than 20 Bt toxins that are most commonly used against 13 insect pests was analyzed. The potential mechanisms of cross-resistance are discussed. The corresponding measures, including pyramid RNA interference and Bt toxin, "high dose/refuge," and so on are advised to be taken for adopting the pyramided strategy to delay the Bt evolution of resistance and control the target pest insect.

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“…The Cry1Ie toxin had high efficacy against ACB resistant to Cry1Ac. Our previous studies showed that, Cry1Ie had no cross resistance with Cry1Ac or Cry1F but Cry1F had low cross resistance with Cry1Ac [23]. Gene pyramiding is a good strategy for IRM and can retard the evolution of pest resistance in transgenic crops [8].…”

Section: Discussionmentioning

confidence: 99%

“…The success of this strategy is based on the assumption that cross-resistance between the different toxins does not occur [22]. Our previous studies showed no cross-resistance between Cry1Ie and Cry1Ac proteins in ACB [23]. …”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bt Corn with Pyramided Genes on Efficacy and Insect Resistance Management for the Asian Corn Borer in China

et al. 2016

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A Bt corn hybrid (AcIe) with two Bt genes (cry1Ie and cry1Ac) was derived by breeding stack from line expressing Cry1Ie and a line expressing Cry1Ac. Efficacy of this pyramided Bt corn hybrid against the Asian corn borer (ACB), Ostrinia furnacalis, was evaluated. We conducted laboratory bioassays using susceptible and resistant ACB strains fed on artificial diet or fresh plant tissues. We also conducted field trials with artificial infestations of ACB neonates at the V6 and silk stages. The toxin-diet bioassay data indicated that mixtures of Cry1Ac and Cry1Ie proteins had synergistic insecticidal efficacy. The plant tissue bioassay data indicated that Bt corn hybrids expressing either a single toxin (Cry1Ac or Cry1Ie) or two toxins had high efficacy against susceptible ACB. Damage ratings in the field trials indicated that the Bt corn hybrids could effectively protect against 1st and the 2nd generation ACB in China. The hybrid line with two Bt genes showed a higher efficacy against ACB larvae resistant to Cry1Ac or CryIe than the hybrid containing one Bt gene, and the two gene hybrid would have increased potential for managing or delaying the evolution of ACB resistance to Bt corn plants.

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Inheritance Patterns, Dominance and Cross-Resistance of Cry1Ab- and Cry1Ac-Selected Ostrinia furnacalis (Guenée)

Cited by 46 publications

References 47 publications

Consumption of Bt Maize Pollen Containing Cry1Ie Does Not Negatively Affect Propylea japonica (Thunberg) (Coleoptera: Coccinellidae)

Consumption of Bt Maize Pollen Containing Cry1Ie Does Not Negatively Affect Propylea japonica (Thunberg) (Coleoptera: Coccinellidae)

The progress in insect cross‐resistance among Bacillus thuringiensis toxins

Evaluation of Bt Corn with Pyramided Genes on Efficacy and Insect Resistance Management for the Asian Corn Borer in China

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