Hybrid Corn CH076044 Breeding Segmentation
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Solution Overview
Problem
Corn breeding techniques face challenges in developing uniform hybrid plants with desirable traits such as high yield, disease resistance, and uniformity, as existing methods often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the hybrid corn variety CH076044, which incorporates cytoplasmic or nuclear factors for male sterility and desired traits like herbicide resistance, insect resistance, and disease resistance, using genetic transformation techniques and backcrossing methods to introduce specific genetic loci, ensuring uniformity and stability across progeny.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop hybrid corn plants, then cross-pollination and genetic diversity are achieved, but uniformity and predictability of plant performance deteriorate
Solution Approach 1:
The patent applies segmentation by developing separate inbred lines through repeated self-pollination to achieve homozygosity at all gene loci. These uniform inbred lines are then used as parents for hybrid production, ensuring that each parent contributes consistent, predictable genetics to the offspring, thereby resolving the uniformity problem while maintaining genetic diversity through the combination of different inbred lines.
Solution Approach 2:
The patent employs preliminary action by conducting multiple generations of self-pollination and selection before producing hybrids. The inbred lines are developed and stabilized through preliminary breeding cycles to ensure uniformity is achieved before the actual hybrid production, guaranteeing reliable and uniform plant performance in the final hybrid generation.
2Reliability
If self-pollination is used to develop inbred plants, then uniformity of true breeding progeny is improved, but genetic variation and adaptability deteriorate
Solution Approach 1:
The patent segments the breeding process into two distinct phases: first, developing uniform inbred lines through self-pollination to achieve homozygosity and reliability; second, crossing different inbred lines to produce hybrids that restore genetic variation and adaptability. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
The patent applies local quality by making different parts of the breeding program have different genetic properties. The inbred lines are made homozygous at all loci for uniformity and reliability, while the hybrid crosses introduce heterozygosity and genetic variation locally in the F1 generation to restore adaptability. Each generation has optimized genetic quality suited to its specific purpose.
3Reliability
If multiple generations of selfing and selection are performed to develop inbreds, then homozygosity and uniformity are improved, but breeding time and complexity increase
Solution Approach 1:
The patent uses preliminary action by conducting multiple generations of self-pollination and selection in advance to develop stable inbred lines before hybrid production is needed. This preliminary development of uniform parents ensures that when hybrids are produced, the genetics are already stabilized, reducing the need for extended breeding cycles and actually shortening the overall time to reliable hybrid production.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH076044. The invention thus relates to the plants, seeds and tissue cultures of the variety CH076044, and to methods for producing a corn plant produced by crossing a corn plant of variety CH076044 with itself or with another corn plant, such as a plant of another variety. The invention further relates to genetic complements of plants of variety CH076044.