Selection and characterization of resistance to the Vip3Aa20 protein fromBacillus thuringiensisinSpodoptera frugiperda
| Autor: | Julio Fatoretto, Tony Burd, Oderlei Bernardi, Renato J. Horikoshi, Celso Omoto, Fernanda C. L. Medeiros, Daniel Bernardi, Leonardo L. Miraldo, Daniela M. Okuma |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine viruses Biology Spodoptera 01 natural sciences 03 medical and health sciences Bacillus thuringiensis parasitic diseases Selection (genetic algorithm) Genetics Larva Resistance (ecology) business.industry Strain (biology) fungi General Medicine biology.organism_classification Biotechnology Pupa 010602 entomology 030104 developmental biology Insect Science Fall armyworm business Agronomy and Crop Science |
| Zdroj: | Pest Management Science. 72:1794-1802 |
| ISSN: | 1526-498X |
| Popis: | BACKGROUND Spodoptera frugiperda is one the main target pests of maize events expressing Vip3Aa20 protein from Bacillus thuringiensis (Bt) in Brazil. In this study, we selected a resistant strain of S. frugiperda on Bt maize expressing Vip3Aa20 protein and characterized the inheritance and fitness costs of the resistance. RESULTS The resistance ratio of the Vip3Aa20-resistant strain of S. frugiperda was >3200-fold. Neonates of the Vip3Aa20-resistant strain were able to survive and emerge as fertile adults on Vip3Aa20 maize, while larvae from susceptible and heterozygous strains did not survive. The inheritance of Vip3Aa20 resistance was autosomal recessive and monogenic. Life history studies to investigate fitness cost revealed an 11% reduction in the survival rate until adult stage and a ∼50% lower reproductive rate of the Vip3Aa20-resistant strain compared with susceptible and heterozygous strains. CONCLUSION This is the first characterization of S. frugiperda resistance to Vip3Aa protein. Our results provide useful information for resistance management programs designed to prevent or delay resistance evolution to Vip3Aa proteins in S. frugiperda. © 2016 Society of Chemical Industry |
| Databáze: | OpenAIRE |
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