Allele Frequency of Resistance to Bacillus thuringiensis Cry1Ab Corn in Louisiana Populations of Sugarcane Borer (Lepidoptera: Crambidae)

Transgenic Bacillus thuringiensis (Bt) corn, Zea mays L., has been widely used to manage a corn borer complex in the mid-southern region of the United States. The sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae), has become a dominant cornstalk boring species in some areas of this...

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Bibliographic Details
Published in:Journal of economic entomology 2008-04, Vol.101 (2), p.492-498
Main Authors: Huang, Fangneng, Leonard, B. Rogers, Moore, Steven H, Cook, Donald R, Baldwin, Jack, Tindall, Kelly V, Lee, Donna R
Format: Article
Language:English
Subjects:
Alleles
Animals
Bacillus thuringiensis
Bacterial Proteins - genetics
Bacterial Proteins - pharmacology
Bt corn
Bt resistance
corn
cornstalk borers
crystal proteins
Diatraea saccharalis
Endotoxins - genetics
Endotoxins - pharmacology
gene frequency
genetic resistance
germplasm screening
Hemolysin Proteins - genetics
Hemolysin Proteins - pharmacology
insecticide resistance
Insecticide Resistance - genetics
INSECTICIDE RESISTANCE AND RESISTANCE MANAGEMENT
insecticide resistance management
Louisiana
monitoring
Moths - drug effects
Moths - genetics
Plants, Genetically Modified
population genetics
resistance alleles
resistance management
resistance monitoring
transgenic plants
Zea mays
Zea mays - genetics
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Summary:Transgenic Bacillus thuringiensis (Bt) corn, Zea mays L., has been widely used to manage a corn borer complex in the mid-southern region of the United States. The sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae), has become a dominant cornstalk boring species in some areas of this region, especially in Louisiana. Therefore, management of sugarcane borer resistance to Bt corn is critical to ensure the long-term sustainability of Bt corn for the region. This study screened 280 two-parent family-lines of sugarcane borer from four geographical populations in Louisiana during 2005 to determine whether Bt resistance allele frequency in sugarcane borer is sufficiently low to meet the rare resistance assumption of the current “high dose/refuge” resistance management strategy for Bt corn. These sugarcane borer family-lines were examined for Bt resistance by using novel F2 screening procedures. No major Bt resistance alleles were detected in these four populations. The estimated frequency of major Bt resistance alleles was
ISSN:0022-0493
1938-291X
DOI:10.1603/0022-0493%282008%29101%5B492%3AAFORTB%5D2.0.CO%3B2