Maize Inbred PH484K Trait Integration via Preliminary Action
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, taking six to twelve years, and existing technologies face challenges in combining desirable traits such as disease resistance, drought tolerance, and high yield in a single variety that is agronomically sound across various conditions and environments.
Innovation Solution
The introduction of the novel maize variety PH484K, which involves crossing and genetic manipulation to incorporate traits like male sterility, disease resistance, and improved agronomic characteristics, using backcross conversion and transformation techniques to create a stable and high-yielding hybrid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then disease resistance and yield improvement are achieved, but the development time becomes excessively long (6-12 years)
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, yield potential, stress tolerance) before hybridization. The inbred PH484K has been预先 developed with resistance to multiple diseases including northern corn leaf blight, gray leaf spot, and Goss's wilt, allowing faster combination of these traits in hybrid programs without requiring lengthy breeding cycles from scratch
Solution Approach 2:
The patent utilizes copying by creating and distributing standardized inbred lines with known genetic characteristics. The inbred PH484K serves as a replicated genetic resource that can be repeatedly crossed with different partner inbreds to produce multiple hybrid varieties, each inheriting the desired traits without redeveloping them each time
2Productivity
If multiple desirable traits are combined in a single maize variety, then agronomic performance and yield are improved, but the complexity of the breeding program increases
Solution Approach 1:
The patent applies segmentation by dividing the complex task of combining multiple traits into manageable segments through the development of specialized inbred lines. Each inbred (PH484K and its partner inbreds) is optimized for specific trait combinations, allowing the breeding program to systematically combine these pre-segmented trait packages in controlled crosses rather than attempting to accumulate all traits simultaneously in a single population
Solution Approach 2:
The patent implements universality by creating inbred lines with multi-functional trait packages. PH484K possesses multiple functions including resistance to several diseases, stress tolerance, and high yield potential, making it a universal parent that can be used across different breeding objectives and environmental conditions, thereby simplifying the overall breeding program structure
3Stability of the object's composition
If stable and high-yielding maize varieties are developed, then agronomic soundness is achieved, but the time required from first cross to seed delivery extends to 6-12 years
Solution Approach 1:
The patent applies preliminary action by completing the stabilization and characterization of inbred lines before hybrid seed production. The inbred PH484K has already undergone multiple generations of selfing and selection to achieve genetic stability and uniformity, eliminating the need for additional stabilization cycles during hybrid development and significantly reducing the time from cross to stable, high-yielding variety
Data Source
AI summary
A novel maize variety designated PH484K and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH484K with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH484K through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby are provided. Hybrid maize seed, plants or plant parts are produced by crossing the variety PH484K or a locus conversion of PH484K with another maize variety.