Frequency of Cry1F Non-Recessive Resistance Alleles in North Carolina Field Populations of Spodoptera frugiperda (Lepidoptera: Noctuidae).
Fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), is a target species of transgenic corn (Zea mays L.) that expresses single and pyramided Bacillus thuringiensis (Bt) toxin. In 2014, S. frugiperda were collected from a light trap in North Carolina, and a total of 212 F1/F2 isofemale lines of S. frugiperda were screened for resistance to Bt and non-Bt corn. All of the 212 isolines were susceptible to corn tissue expressing Cry1A.105 + Cry2Ab, Cry1F + Cry1A.105 + Cry2Ab, and Cry1F + Cry1Ab + Vip3Aa20. Growth rate bioassays were performed to isolate non-recessive Bt resistance alleles. Seven individuals out of the 212 isofemale lines carried major non-recessive alleles conferring resistance to Cry1F. A pooled colony was created from the seven individuals. This colony was 151.21 times more resistant to Cry1F than a known-susceptible population and was also resistant to Cry1A.105, but was not resistant to Cry2Ab and Vip3Aa20. The results demonstrate that field populations of S. frugiperda collected from North Carolina are generally susceptible to Cry1F, but that some individuals carry resistant alleles. The data generated in this study can be used as baseline data for resistance monitoring.
Department of Entomology, North Carolina State University, Vernon G. James Research and Extension Center, 207 Research Station Road, Plymouth, North Carolina, 27962, United States of America.|Henan Key Laboratory of Crop Pest Control, MOA'S Regional Key Lab of Crop IPM in Southern Part of Northern China, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, the People's Republic of China.
Guoping
G
Li
Department of Entomology, North Carolina State University, Vernon G. James Research and Extension Center, 207 Research Station Road, Plymouth, North Carolina, 27962, United States of America.
Dominic
D
Reisig
Department of Entomology, North Carolina State University, Vernon G. James Research and Extension Center, 207 Research Station Road, Plymouth, North Carolina, 27962, United States of America.|Henan Key Laboratory of Crop Pest Control, MOA'S Regional Key Lab of Crop IPM in Southern Part of Northern China, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, the People's Republic of China.
Jin
J
Miao
Department of Entomology, North Carolina State University, Raleigh, North Carolina, 27695, United States of America.
Fred
F
Gould
Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, 70803, United States of America.
Fangneng
F
Huang
Henan Key Laboratory of Crop Pest Control, MOA'S Regional Key Lab of Crop IPM in Southern Part of Northern China, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, the People's Republic of China.
Hongqiang
H
Feng
D000483:Alleles; D000818:Animals; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000235:genetics*; D004731:Endotoxins / Q000235:genetics*; D005260:Female; D005828:Genetics, Population; D006460:Hemolysin Proteins / Q000235:genetics*; D007300:Insect Control; D007305:Insecticide Resistance; D009657:North Carolina; D030821:Plants, Genetically Modified / Q000235:genetics; D018411:Spodoptera / Q000235:genetics / Q000254:growth & development*; D003313:Zea mays / Q000235:genetics* / Q000469:parasitology
D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis