CL261 Herbicide-Resistant Rice Cultivar for Weed Control
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Solution Overview
Problem
There is a lack of herbicide-resistant, medium-grain rice cultivars adapted for the southern United States, which poses challenges in weed control, particularly with the weed 'red rice', and existing herbicide-tolerant cultivars do not meet market demands for agronomically desirable characteristics.
Innovation Solution
Development of a novel, herbicide-resistant, high-yielding, early maturing, short stature medium-grain rice cultivar 'CL261' with imidazolinone herbicide resistance, allowing for the use of Clearfield™ rice technology and specific herbicides for weed control, and methods for producing hybrids and derivatives with enhanced traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If herbicide-resistant rice cultivars are developed, then weed control effectiveness is improved, but grain quality or yield may deteriorate
Solution Approach 1:
The patent applies parameter changes by modifying the genetic parameters of rice cultivars to introduce herbicide resistance traits. Specifically, it combines herbicide resistance genes with medium-grain quality genes through breeding programs, creating new cultivars that maintain desirable grain characteristics while gaining weed control capabilities. The patent documents multiple cultivars (CL161, CL261, LLF161, LLF261) developed through this parameter modification approach.
2Object-affected harmful factors
If herbicide-resistant rice cultivars are developed, then weed control effectiveness is improved, but grain quality may deteriorate
Solution Approach 1:
The patent modifies genetic parameters to simultaneously achieve herbicide resistance and maintain medium-grain quality characteristics. Through systematic breeding programs, it has created cultivars with specific grain parameters (length, width, aspect ratio) that match commercial medium-grain standards while incorporating herbicide resistance traits. The patent explicitly states that developed cultivars have grain quality comparable to or exceeding conventional medium-grain varieties.
3Object-affected harmful factors
If new herbicide-resistant cultivars are developed through breeding programs, then weed control capability is improved, but development time and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-screening parental lines for both herbicide resistance traits and desirable grain quality characteristics before initiating crosses. This preliminary selection process reduces the complexity of subsequent breeding steps by ensuring that parent plants already possess key desired traits, thereby streamlining the development process and reducing the number of generations required to achieve the target cultivar.
4Adaptability or versatility
If herbicide-resistant medium-grain rice cultivars are developed, then adaptability to southern growing conditions is improved, but the complexity of meeting multiple market requirements increases
Solution Approach 1:
The patent applies universality by developing herbicide-resistant medium-grain rice cultivars that simultaneously meet multiple market requirements: southern U.S. growing conditions adaptability, medium-grain quality standards, and herbicide resistance. The developed cultivars are designed to function universally across these different requirements, providing a single solution that addresses weed control, grain quality, and regional adaptability needs.
Data Source
AI summary
The herbicide-tolerant rice cultivar designated ‘CL261’ and its hybrids and derivatives are disclosed.