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Full-Text Articles in Life Sciences
Direct And Correlated Effects Of Selection On Flight After Exposure To Thermal Stress In Drosophila Melanogaster, Robert A. Krebs, Kimberly A. Thompson
Direct And Correlated Effects Of Selection On Flight After Exposure To Thermal Stress In Drosophila Melanogaster, Robert A. Krebs, Kimberly A. Thompson
Biological, Geological, and Environmental Faculty Publications
To demonstrate how insects may adapt to ecologically relevant levels of heat stress, we performed artificial selection on the ability of Drosophila melanogaster to fly after an exposure to a high but non-lethal thermal stress. Both tolerance and intolerance to heat stress arose very quickly, as only a few generations of selection were necessary to cause significant separation between high and low lines for heat tolerance. Estimates of heritability based on the lines artificially selected for increased flight ability ranged from 0.024 to 0.052, while estimates of heritability based on the lines selected for the inability to fly after heat …
Effect Of Bacillus Thuringiensis Cry3bb1 Protein On The Feeding Behavior And Longevity Of Adult Western Corn Rootworms (Coleoptera: Chrysomelidae), Timothy M. Nowatski, Xugou Zhou, Lance J. Meinke, Ty Vaughn, Blair Siegfried
Effect Of Bacillus Thuringiensis Cry3bb1 Protein On The Feeding Behavior And Longevity Of Adult Western Corn Rootworms (Coleoptera: Chrysomelidae), Timothy M. Nowatski, Xugou Zhou, Lance J. Meinke, Ty Vaughn, Blair Siegfried
Department of Entomology: Faculty Publications
The first transgenic corn hybrids expressing the Bacillus thuringiensis (Bt) Cry3Bb1 protein to control corn rootworm (Diabrotica spp.) larvae were registered for commercial use in 2003. This study was conducted to investigate the effect of Cry3Bb1 protein in combination with a cucurbitacin bait on adult feeding and longevity of both organophosphate-resistant and -susceptible western corn rootworms, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae). In choice and no-choice tests, possible repellency to the Bt protein was quantified by comparing beetle consumption of cellulose disks treated with three concentrations of Bt in combination with a feeding stimulant (Invite EC) to disks treated …
Survival Of Antibiotic Resistant And Antibiotic Sensitive Strains Of E. Coli O157 And E. Coli O26 In Food Matrices., Ciara Walsh, Geraldine Duffy, I. S. Blair, D. A. Mcdowell
Survival Of Antibiotic Resistant And Antibiotic Sensitive Strains Of E. Coli O157 And E. Coli O26 In Food Matrices., Ciara Walsh, Geraldine Duffy, I. S. Blair, D. A. Mcdowell
Articles
Escherichia coli O157:H7 or E. coli O26, which were AS (antibiotic sensitive), AR (laboratory created antibiotic resistant mutants), or naturally MAR (multi-antibiotic resistant), were inoculated into laboratory media, yoghurt or orange juice and their growth/survival monitored during enrichment at 37 °C or storage at 4 °C. The strains were also inoculated into minced beef and their thermal inactivation (D-values) examined at 55 °C, with and without a prior heat shock at 48 °C. The growth kinetics (lag phases, growth rates) of the VTEC (verocytotoxigenic E. coli), incubated over 24 h at 37 °C in laboratory media, were …