Frequency and fitness cost of resistance to Bacillus thuringiensis in Chrysomela tremulae (Coleoptera: Chrysomelidae)
Article Abstract:
Pest adaptation to transgenic plants producing 'Bacillus thuringiensis' (Bt) toxins can be delayed or prevented by the 'high dose-refuge' (HDR) strategy whose efficacy depends primarily on the initial frequency of Bt resistance alleles and on the fitness costs associated with these alleles. A study has concluded that resistance to Bt plants may be present at detectable frequencies in pest populations before selection resulting from pest management by humans.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2006
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Genetic isolation between two sympatric host plant races of the European corn borer, Ostrinia nubilalis Hubner. II: Assortative mating and host-plant preferences for oviposition
Article Abstract:
The genetic isolation of races of European corn borer (ECB), Ostrinia nubilalis Hubner is examined with the help of strains from the maize (Z strain) and mugwort (E strain) races. No evidence for crosses between Z females and E males were observed and mating between individuals of the same strain occurred more frequently than mating between males and females of the E and Z strains.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2005
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- Abstracts: Binding of the CryIVD toxin of Bacillus thuringiensis subsp. israelensis to larval dipteran midgut proteins. High-level cryIVD and cytA gene expression in Bacillus thuringiensis does not require the 20 kilodalton protein, and the coexprssed gene products are synergistic in their toxicity to mosquitoes
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