Hybrid Corn CH031776 Segmented Breeding for Genetic Uniformity
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Solution Overview
Problem
Current corn breeding methods face challenges in developing uniform hybrid varieties with desirable traits such as high yield, disease resistance, and uniform germination due to genetic non-uniformity and unpredictability in cross-pollination, requiring the development of stable inbred plants and specific breeding techniques.
Innovation Solution
The development of the hybrid corn variety CH031776, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, utilizing cytoplasmically-inherited traits and transgenes integrated through genetic transformation, along with tissue culture methods to regenerate plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to develop corn hybrids, then genetic diversity and trait combination are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing homozygous inbred lines through self-pollination to ensure genetic uniformity, then crossing these standardized lines to introduce diversity. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Homozygous inbred parent lines are developed and standardized before the hybridization step. This preliminary action of creating genetically uniform parents ensures that the subsequent cross-pollination produces predictable and uniform hybrid offspring with consistent trait expression.
2Stability of the object's composition
If self-pollination is used to develop inbred lines, then genetic uniformity is improved, but genetic diversity and trait combination deteriorate
Solution Approach 1:
Self-pollination is used as a preliminary action to create homozygous inbred lines with fixed genetic compositions. These uniform parent lines serve as the foundation for subsequent hybridization, ensuring that diversity is introduced in a controlled manner while maintaining predictability.
Solution Approach 2:
The breeding program is divided into separate self-pollination phases for parent line development and cross-pollination phases for hybrid production. This segmentation allows each process to fulfill its specific function: selfing for uniformity, crossing for diversity and trait combination.
3Adaptability or versatility
If multiple breeding methods are used to combine desirable traits, then trait diversity is improved, but breeding process complexity deteriorates
Solution Approach 1:
The patent employs multiple breeding techniques (pedigree breeding, recurrent selection, genetic transformation, tissue culture) within a unified hybridization framework. Each method serves specific functions but all contribute to the ultimate goal of producing uniform hybrids with desired traits, reducing overall system complexity through functional integration.
Solution Approach 2:
Homozygous inbred lines serve as intermediaries that facilitate the combination of multiple desirable traits. These standardized parent lines act as carriers for specific trait combinations, making the integration of diverse traits more systematic and less complex than direct multi-parent crossing.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH031776. The invention thus relates to the plants, seeds and tissue cultures of the variety CH031776, and to methods for producing a corn plant produced by crossing a corn plant of variety CH031776 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 CH031776.