Chandrasena, Desmi I Signorini, Ana M Abratti, Gustavo Storer, Nicholas P Olaciregui, Magdalena L Alves, Analiza P and Pilcher, Clinton D 2018. Characterization of field-evolved resistance to Bacillus thuringiensis -derived Cry1F δ-endotoxin in Spodoptera frugiperda populations from Argentina. Pest Management Science, Vol. 74, Issue. 3, p. 746.
Yang, Guoqing Niu, Ying Head, Graham P. Price, Paula A. and Huang, Fangneng 2017. Performance of Cry1Ab-susceptible and -heterozygous resistant populations of sugarcane borer in sequential feedings on non-Bt and Bt maize plant tissue. Entomologia Experimentalis et Applicata, Vol. 162, Issue. 1, p. 51.
Camargo, Ana M. Castañera, Pedro Farinós, Gema P. and Huang, Fangneng 2017. Comparative analysis of the genetic basis of Cry1F resistance in two strains of Spodoptera frugiperda originated from Puerto Rico and Florida. Journal of Invertebrate Pathology, Vol. 146, p. 47.
Santos-Amaya, O. F. Tavares, C. S. Rodrigues, J.V.C. Souza, T. C. Rodrigues-Silva, N. Guedes, R.N.C. Alves, A. P. and Pereira, E.J.G. 2017. Magnitude and Allele Frequency of Cry1F Resistance in Field Populations of the Fall Armyworm (Lepidoptera: Noctuidae) in Brazil. Journal of Economic Entomology, Vol. 110, Issue. 4, p. 1770.
Yang, Fei Kerns, David L. Head, Graham Brown, Sebe and Huang, Fangneng 2017. Susceptibility of Cry1F-maize resistant, heterozygous, and susceptible Spodoptera frugiperda to Bt proteins used in the transgenic cotton. Crop Protection, Vol. 98, p. 128.
Banerjee, Rahul Hasler, James Meagher, Robert Nagoshi, Rodney Hietala, Lucas Huang, Fangneng Narva, Kenneth and Jurat-Fuentes, Juan Luis 2017. Mechanism and DNA-based detection of field-evolved resistance to transgenic Bt corn in fall armyworm (Spodoptera frugiperda). Scientific Reports, Vol. 7, Issue. 1,
Ingber, David A Mason, Charles E and Flexner, Lindsey 2017. Cry1 Bt Susceptibilities of Fall Armyworm (Lepidoptera: Noctuidae) Host Strains. Journal of Economic Entomology,
Santos-Amaya, Oscar F Tavares, Clébson S Rodrigues, João Victor C Campos, Silverio O Guedes, Raul Narciso C Alves, Analiza P and Pereira, Eliseu José G 2017. Fitness costs and stability of Cry1Fa resistance in Brazilian populations ofSpodoptera frugiperda. Pest Management Science, Vol. 73, Issue. 1, p. 35.
Nagoshi, Rodney N Fleischer, Shelby and Meagher, Robert L 2017. Demonstration and Quantification of Restricted Mating Between Fall Armyworm Host Strains in Field Collections by SNP Comparisons. Journal of Economic Entomology, Vol. 110, Issue. 6, p. 2568.
Niu, Ying Head, Graham P. Price, Paula A. and Huang, Fangneng 2017. Inheritance and fitness costs of Cry1A.105 resistance in two strains of Spodoptera frugiperda (J.E. Smith). Crop Protection,
Acharya, Binod Head, Graham P. Price, Paula A. and Huang, Fangneng 2017. Fitness costs and inheritance of Cry2Ab2 resistance in Spodoptera frugiperda (J.E. Smith). Journal of Invertebrate Pathology, Vol. 149, p. 8.
Silva, Karen F. Da Spencer, Terence A. Crespo, Andre L. B. and Siegfried, Blair D. 2016. Susceptibility ofSpodoptera frugiperda(Lepidoptera: Noctuidae) Field Populations to the Cry1FBacillus thuringiensisInsecticidal Protein. Florida Entomologist, Vol. 99, Issue. 4, p. 629.
Horikoshi, Renato J. Bernardi, Daniel Bernardi, Oderlei Malaquias, José B. Okuma, Daniela M. Miraldo, Leonardo L. Amaral, Fernando S. de A. e and Omoto, Celso 2016. Effective dominance of resistance of Spodoptera frugiperda to Bt maize and cotton varieties: implications for resistance management. Scientific Reports, Vol. 6, Issue. 1,
Leite, Natália A. Mendes, Simone M. Santos-Amaya, Oscar F. Santos, Chritiane A. Teixeira, Thaís P. M. Guedes, Raul N. C. and Pereira, Eliseu J. G. 2016. Rapid selection and characterization of Cry1F resistance in a Brazilian strain of fall armyworm. Entomologia Experimentalis et Applicata, Vol. 158, Issue. 3, p. 236.
Niu, Ying Qureshi, Jawwad A. Ni, Xinzhi Head, Graham P. Price, Paula A. Meagher, Robert L. Kerns, David Levy, Ronnie Yang, Xiangbing and Huang, Fangneng 2016. F 2 screen for resistance to Bacillus thuringiensis Cry2Ab2-maize in field populations of Spodoptera frugiperda (Lepidoptera: Noctuidae) from the southern United States. Journal of Invertebrate Pathology, Vol. 138, p. 66.
Santos-Amaya, Oscar F. Rodrigues, João V. C. Souza, Thadeu C. Tavares, Clébson S. Campos, Silverio O. Guedes, Raul N.C. and Pereira, Eliseu J.G. 2016. Resistance to dual-gene Bt maize in Spodoptera frugiperda: selection, inheritance and cross-resistance to other transgenic events. Scientific Reports, Vol. 5, Issue. 1,
Chakroun, Maissa Banyuls, Núria Walsh, Tom Downes, Sharon James, Bill and Ferré, Juan 2016. Characterization of the resistance to Vip3Aa in Helicoverpa armigera from Australia and the role of midgut processing and receptor binding. Scientific Reports, Vol. 6, Issue. 1,
Bernardi, Oderlei Bernardi, Daniel Horikoshi, Renato J Okuma, Daniela M Miraldo, Leonardo L Fatoretto, Julio Medeiros, Fernanda CL Burd, Tony and Omoto, Celso 2016. Selection and characterization of resistance to the Vip3Aa20 protein fromBacillus thuringiensisinSpodoptera frugiperda. Pest Management Science, Vol. 72, Issue. 9, p. 1794.
Garcia, Adriano G. Ferreira, Cláudia P. Cônsoli, Fernando L. and Godoy, Wesley A.C. 2016. Predicting evolution of insect resistance to transgenic crops in within-field refuge configurations, based on larval movement. Ecological Complexity, Vol. 28, p. 94.
Santos-Amaya, Oscar F. Tavares, Clébson S. Monteiro, Hugo M. Teixeira, Thaís P.M. Guedes, Raul N.C. Alves, Analiza P. and Pereira, Eliseu J.G. 2016. Genetic basis of Cry1F resistance in two Brazilian populations of fall armyworm, Spodoptera frugiperda. Crop Protection, Vol. 81, p. 154.
Transgenic maize, Zea maize L., expressing the Cry1F protein from Bacillus thuringiensis has been registered for Spodoptera frugiperda (J. E. Smith) control since 2003. Unexpected damage to Cry1F maize was reported in 2006 in Puerto Rico and Cry1F resistance in S. frugiperda was documented. The inheritance of Cry1F resistance was characterized in a S. frugiperda resistant strain originating from Puerto Rico, which displayed >289-fold resistance to purified Cry1F. Concentration–response bioassays of reciprocal crosses of resistant and susceptible parental populations indicated that resistance is recessive and autosomal. Bioassays of the backcross of the F1 generation crossed with the resistant parental strain suggest that a single locus is responsible for resistance. In addition, cross-resistance to Cry1Aa, Cry1Ab, Cry1Ac, Cry1Ba, Cry2Aa and Vip3Aa was assessed in the Cry1F-resistant strain. There was no significant cross-resistance to Cry1Aa, Cry1Ba and Cry2Aa, although only limited effects were observed in the susceptible strain. Vip3Aa was highly effective against susceptible and resistant insects indicating no cross-resistance with Cry1F. In contrast, low levels of cross-resistance were observed for both Cry1Ab and Cry1Ac. Because the resistance is recessive and conferred by a single locus, an F1 screening assay was used to measure the frequency of Cry1F-resistant alleles from populations of Florida and Texas in 2010 and 2011. A total frequency of resistant alleles of 0.13 and 0.02 was found for Florida and Texas populations, respectively, indicating resistant alleles could be found in US populations, although there have been no reports of reduced efficacy of Cry1F-expressing plants.
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