Rice Cultivar CL 142-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 plants, with conventional methods lacking control at the DNA level, leading to high research costs and variability in developing superior rice cultivars.
Innovation Solution
Development of the rice cultivar CL 142-AR, which is a high-yielding, short to mid-season, semi-dwarf, long-grain cultivar with enhanced traits such as herbicide resistance, disease resistance, and improved agronomic characteristics, achieved through specific breeding methods and genetic engineering techniques, allowing for controlled introduction of desirable genes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional breeding methods are used to develop superior rice cultivars, then genetic diversity and trait combinations can be explored, but the process is time-consuming and unpredictable due to lack of control at the DNA level
Solution Approach 1:
The patent replaces conventional mechanical breeding methods (crossing, selection, and evaluation of phenotypes) with molecular marker-assisted selection. Specific DNA markers linked to desirable traits (disease resistance, yield components, grain quality) are used to identify superior genotypes directly at the molecular level, eliminating the need for time-consuming phenotypic evaluation and enabling precise selection without relying on unpredictable environmental expression of traits.
Solution Approach 2:
The patent introduces molecular markers as intermediaries between genotype and phenotype. These markers serve as reliable indicators that allow breeders to select plants with desired traits based on DNA analysis rather than waiting for phenotypic expression, thus bridging the gap between genetic potential and observable characteristics while significantly reducing selection time and increasing accuracy.
2Adaptability or versatility
If conventional breeding methods are used, then natural genetic variation can be utilized, but research costs are high due to unpredictability and multiple evaluation cycles
Solution Approach 1:
The patent replaces costly and time-consuming multi-location field trials and phenotypic evaluations with efficient DNA-based marker analysis. By using molecular markers to predict trait expression, the method eliminates the need for expensive replicated field testing across multiple environments, reducing research costs while maintaining the utilization of natural genetic variation present in breeding populations.
Solution Approach 2:
The patent performs preliminary genetic evaluation at the DNA level before conducting expensive field trials. By using molecular markers to pre-screen breeding lines for desirable traits, the method identifies promising candidates early in the breeding process, allowing resources to be focused on the most promising genotypes and avoiding wasteful investment in lines that lack desired genetic potential.
3Measurement precision
If traditional breeding selection is used to identify superior plants, then phenotypic evaluation can be performed, but the process lacks precision due to environmental influences on trait expression
Solution Approach 1:
The patent uses molecular markers as intermediaries that provide a direct link to genotype without being influenced by environmental factors. These DNA-based markers offer precise measurement of genetic potential for specific traits, eliminating the noise and variability introduced by environmental conditions during phenotypic evaluation, thus providing accurate prediction of trait expression regardless of growing conditions.
Solution Approach 2:
The patent replaces complex multi-environment phenotypic evaluation systems with simplified DNA-based marker analysis. This substitution maintains or improves measurement precision by directly assessing genetic potential without environmental interference, while simultaneously reducing overall process complexity by eliminating the need for replicated field trials across multiple locations and years.
Data Source
AI summary
A rice cultivar designated CL 142-AR is disclosed. The invention relates to the seeds of rice cultivar CL 142-AR, to the plants of rice CL 142-AR, to methods for producing a rice plant produced by crossing the cultivar CL 142-AR with itself or another rice variety, and to methods for controlling weeds in the vicinity of plants of rice cultivar CL 142-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 CL 142-AR with another rice cultivar.