Maize Inbred ID2516 Breeding Segmentation
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Solution Overview
Problem
Corn breeding faces challenges in producing high-yielding, agronomically sound plants that are uniformly adapted across the U.S. Corn Belt, as regional growing conditions and specific issues like Gray Leaf Spot infection, cool temperatures, and soil pH levels require region-specific traits, and existing methods struggle to introduce desired traits efficiently into inbred lines.
Innovation Solution
The development of maize inbred plant ID2516, which includes a mutant or transgenic gene conferring traits such as herbicide resistance, insect resistance, and abiotic stress tolerance, and a method for introducing desired heritable traits through crossing, selection, and backcrossing to produce hybrid seeds with specific characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional breeding methods are used to develop maize inbreds, then uniformity and homozygosity are achieved, but vigor and seed yield are reduced
Solution Approach 1:
The breeding program segments the development process into distinct phases: initial cross-pollination to create hybrid F1 generation with high vigor, followed by controlled self-pollination over multiple generations to achieve homozygosity in inbred lines. This segmentation allows each generation to serve its specific purpose without compromising the other.
Solution Approach 2:
The patent applies preliminary action by first creating the hybrid F1 generation with desired vigor and yield characteristics, then using this hybrid as the basis for developing subsequent inbred lines. The hybrid's superior traits are established before the homozygosity process begins, ensuring that the genetic foundation for high productivity is already in place.
2Stability of the object's composition
If inbred lines are used for hybrid seed production, then reproducibility and uniformity are improved, but plant vigor is reduced
Solution Approach 1:
The breeding system dynamically transitions between heterozygous hybrid generation (for vigor) and homozygous inbred generation (for uniformity). The inbred lines serve as stable parental stocks that are periodically refreshed through new crosses, allowing the system to maintain both uniformity and vigor across different breeding cycles.
Solution Approach 2:
Desired vigor traits are established in the hybrid F1 generation before the inbred lines are fully developed. This preliminary establishment of vigor characteristics ensures that even as inbreds become highly homozygous, the hybrid offspring will inherit and express the desired vigor traits.
3Adaptability or versatility
If multiple breeding objectives are pursued simultaneously, then trait diversity increases, but breeding program complexity increases
Solution Approach 1:
The breeding program segments trait incorporation into distinct phases: core traits (yield, vigor) are established in initial crosses, while secondary traits (disease resistance, stress tolerance) are introduced in subsequent backcrossing generations. This segmentation manages complexity by handling one set of traits at a time rather than all simultaneously.
Solution Approach 2:
The patent employs universal breeding methods including backcrossing, self-pollination, and selection that can be applied across multiple trait types. These multi-functional techniques allow the same procedural framework to handle diverse trait incorporation needs, reducing overall program complexity despite the variety of objectives.
4Reliability
If regional adaptation is prioritized, then performance in specific areas improves, but overall adaptability across the Corn Belt decreases
Solution Approach 1:
The breeding program applies local quality by developing inbred lines with specific trait combinations tailored to different Corn Belt regions. Each regional variant incorporates traits appropriate for its environment (e.g., disease resistance for humid areas, drought tolerance for arid regions) while maintaining the core hybrid vigor foundation, allowing optimized performance in specific locations without sacrificing overall adaptability.
Data Source
AI summary
The present invention provides an inbred corn line designated ID2516, methods for producing a corn plant by crossing plants of the inbred line ID2516 with plants of another corn plant. The invention further encompasses all parts of inbred corn line ID2516, including culturable cells. Additionally provided herein are methods for introducing transgenes into inbred corn line ID2516, and plants produced according to these methods.