Rice Cultivar CL171-AR Herbicide Resistance Breeding
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Solution Overview
Problem
Rice breeding is a time-consuming and unpredictable process due to the complexity of identifying genetically superior individuals, with conventional methods lacking control at the DNA level, leading to high research costs and variability in resulting cultivars.
Innovation Solution
Development of the rice cultivar CL171-AR, which is a high-yielding, midseason, long-grain cultivar with improved traits such as herbicide resistance, and methods for producing rice plants with superior characteristics through selfing, backcrosses, and hybrid production, including the use of regenerable cells for tissue culture and application of AHAS-inhibiting herbicides for weed control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional breeding methods are used to develop new rice cultivars, then genetic diversity and trait improvement can be achieved, but the process becomes time-consuming and unpredictable with high research costs
Solution Approach 1:
The patent replaces conventional mechanical breeding methods (manual crossing, selection, and evaluation) with molecular marker-assisted selection. DNA markers are used to identify and select plants with desired traits at the molecular level, eliminating the need for time-consuming phenotypic evaluation and multiple generations of breeding. This substitution of mechanical breeding processes with molecular techniques directly resolves the contradiction by making the breeding process both faster and more predictable.
2Reliability
If extensive field testing and evaluation are conducted to ensure cultivar stability and uniformity, then reliability of the cultivar is improved, but research costs and resource requirements increase
Solution Approach 1:
The patent replaces extensive field testing and phenotypic evaluation with DNA marker analysis. Molecular markers provide direct genetic evidence of cultivar purity, stability, and uniformity without requiring large-scale field trials. This substitution reduces research resources and costs while maintaining or improving the reliability assessment of the cultivar.
Solution Approach 2:
The patent uses DNA markers as molecular copies or fingerprints of the desired genetic traits. Instead of physically testing and evaluating the phenotypic expression of traits in the field, researchers can analyze the presence and composition of specific DNA markers that copy or represent the desired genetic information. This allows for rapid assessment of cultivar reliability without extensive field testing.
3Productivity
If manual crossing and selection methods are used in rice breeding, then traditional breeding objectives can be met, but productivity and efficiency of the breeding program are reduced
Solution Approach 1:
The patent replaces manual crossing and selection operations with molecular marker-guided breeding. DNA markers enable breeders to identify plants with desired traits at the seedling stage, eliminating the need for manual crossing and multi-generation selection processes. This substitution dramatically increases breeding productivity while the standardized molecular protocols actually reduce process complexity compared to traditional methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
CL171-AR demonstrates stability and uniformity, offering enhanced yield and resistance to certain diseases, while the methods enable the production of rice plants with improved agronomic traits and herbicide tolerance, reducing weed competition and streamlining the breeding process.
Implementation Method 1
application of AHAS-inhibiting herbicides for weed control
Data Source
AI summary
A rice cultivar designated CL171-AR is disclosed. The invention relates to the seeds of rice cultivar CL171-AR, to the plants of rice CL171-AR, to methods for producing a rice plant produced by crossing the cultivar CL171-AR with itself or another rice variety, and to methods for controlling weeds in the vicinity of plants of rice cultivar CL171-AR, which comprises increased resistance to acetohydroxyacid synthase-inhibiting herbicides. The invention further relates to hybrid rice seeds and plants produced by crossing the cultivar CL171-AR with another rice cultivar.