Maize Variety HID4869 Regional Adaptation Segmentation
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Solution Overview
Problem
Corn breeding faces challenges in developing hybrid seeds that are uniformly adapted across the entire U.S. Corn Belt due to regional differences in growing conditions, such as Gray Leaf Spot infection, cool temperatures, and soil pH levels, which require specific agronomic traits that current methods struggle to combine effectively.
Innovation Solution
The development of the maize variety HID4869, which includes a process for producing hybrid seeds by crossing HID4869 with other maize plants to introduce traits like increased water stress resistance, herbicide resistance, and modified metabolism, using techniques like backcrossing and marker-assisted selection to ensure uniformity and adaptability across different regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop hybrid seeds, then hybrid vigor is achieved, but uniform adaptation across different Corn Belt regions is difficult to achieve
Solution Approach 1:
The breeding program is segmented into distinct phases: initial development of inbred lines with specific regional adaptations, followed by systematic crossing programs that combine these lines. This segmentation allows different traits to be developed independently for different regions, then integrated into unified hybrid varieties that maintain regional adaptability while achieving broad compatibility across the Corn Belt.
Solution Approach 2:
The patent applies local quality by developing inbred lines with specific adaptations to particular Corn Belt regions (e.g., northern, southern, eastern, western regions with different soil pH, temperature, and disease pressures), then combining these lines in hybrid programs. This ensures that each hybrid inherits region-specific adaptations while maintaining overall uniformity and vigor across the entire Corn Belt.
2Stability of the object's composition
If inbred lines are used as parents for hybrid production, then uniformity and reproducibility are achieved, but seed production difficulty increases due to decreased vigor
Solution Approach 1:
The patent employs preliminary action by developing and maintaining a library of pre-characterized inbred lines with known traits, performance data, and regional adaptations before initiating hybrid seed production. This preliminary preparation allows breeders to select optimal parental combinations in advance, ensuring uniformity and reproducibility while simplifying the actual seed production process through careful planning and pre-testing of parental lines.
3Adaptability or versatility
If regional-specific traits are incorporated into hybrids, then adaptability to local conditions improves, but complexity of breeding programs increases
Solution Approach 1:
The patent achieves universality by developing a core set of inbred lines that possess multiple desirable traits and can serve as parental lines for multiple different hybrid combinations across various regions. These universal parental lines have been bred to carry complementary traits that can be combined in different ways to address regional variations, reducing the need for entirely separate breeding programs for each region while maintaining local adaptability.
Data Source
AI summary
The present invention provides an inbred corn line designated HID4869, methods for producing a corn plant by crossing plants of the inbred line HID4869 with plants of another corn plant. The invention further encompasses all parts of inbred corn line HID4869, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line HID4869, and plants produced according to these methods.