DvABCB1 Receptor Sequences for Insect Resistance Detection
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Solution Overview
Problem
The development of resistance to Bt toxins in insect pests, such as the Western Corn Rootworm, poses a challenge in effective pest control, as traditional methods using transgenic plants with Cry3 class insecticidal proteins are compromised by altered toxin receptor sequences, leading to reduced susceptibility in target insects.
Innovation Solution
The disclosure provides methods for detecting insects resistant to Cry3 class insecticidal proteins by assaying nucleic acids for altered DvABCB1 sequences or reduced transcript levels, allowing for the alteration of integrated pest management strategies and potential insecticide application in fields, utilizing specific sequences like DvABCB1_3AR1, DvABCB1_3AR_2, or DvABCB1_3AR3 to identify resistant individuals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transgenic plants with Cry3 class insecticidal proteins are used for pest control, then crop damage is reduced, but insect resistance develops due to altered toxin receptor sequences
Solution Approach 1:
The patent implements monitoring programs that detect resistance alleles in insect populations and provide feedback to adjust pest management strategies. This feedback mechanism allows for timely intervention when resistance develops, maintaining the reliability of pest control while continuing to use Cry3 class toxins for crop protection.
Solution Approach 2:
The patent identifies specific molecular parameters (altered DvABCB1 sequences) that indicate resistance. By monitoring changes in these parameters, the system can detect resistance development and adjust management approaches, thereby maintaining effective pest control despite the presence of resistance alleles.
2Reliability
If monitoring programs are implemented to detect resistant insects, then resistance management is improved, but additional resources and complexity are required
Solution Approach 1:
The patent replaces complex field-based monitoring with molecular diagnostic methods that analyze DNA sequences. This substitution of mechanical/field-based approaches with molecular techniques simplifies the monitoring process while improving the reliability of resistance detection, reducing the resources needed for implementation.
Solution Approach 2:
The patent uses molecular copies (DNA sequences) of the toxin receptor to monitor resistance rather than directly observing insect behavior or physiology. This copying approach simplifies monitoring by working with stable genetic material that can be easily sampled and analyzed, reducing the complexity of resistance management programs.
Data Source
AI summary
The disclosure relates to insecticidal toxin resistance management and screening of novel insecticidal toxin receptors for insect resistance. One embodiment relates to the isolation, characterization, compositions, and methods of use relating to polynucleotides encoding novel insecticidal toxin receptors and the polypeptides encoded thereby. The polynucleotides and polypeptides are useful in identifying or designing insect pest management strategies.