Hybrid Corn Variety Breeding With Male Sterility and Hybrid Purity
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Solution Overview
Problem
Existing corn breeding techniques struggle to develop hybrids with uniformity and desirable traits such as high yield, disease resistance, and drought tolerance, while maintaining genetic stability and commercial viability.
Innovation Solution
The development of the hybrid corn variety CH010453, which incorporates cytoplasmic or nuclear factors for male sterility, genetic modifications for traits like herbicide resistance and disease resistance, and a method for controlled cross-pollination using emasculation and bagging techniques to ensure hybrid purity, along with genetic editing using engineered nucleases for precise trait introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop hybrid corn varieties, then genetic diversity can be achieved, but uniformity and genetic stability are compromised
Solution Approach 1:
The breeding program segments the development process into distinct phases: creating homozygous inbred lines through repeated self-pollination, then crossing these stabilized lines to produce uniform hybrids. This segmentation allows genetic diversity to be captured in the inbred parent lines while ensuring genetic stability and uniformity in the commercial hybrid progeny.
Solution Approach 2:
The patent applies preliminary action by extensively pre-selecting and stabilizing inbred parent lines through multiple generations of self-pollination and rigorous phenotypic evaluation before crossing. This preliminary stabilization ensures that when hybrids are produced, they exhibit uniformity and predictable performance, resolving the contradiction between diversity and stability.
2Adaptability or versatility
If extensive breeding programs are conducted to combine multiple desirable traits, then trait diversity improves, but time and resource consumption increase
Solution Approach 1:
The patent performs preliminary action by pre-developing and characterizing multiple inbred lines that each possess specific desirable traits (disease resistance, yield potential, stress tolerance). These pre-characterized lines are then crossed to combine traits efficiently, significantly reducing the time required compared to developing new trait combinations from scratch.
Solution Approach 2:
The breeding program creates inbred lines that serve multiple functions: they can be used as parental lines for hybrid production, as check varieties for performance evaluation, and as genetic resources for future breeding. This multi-functionality reduces overall program time and resource requirements.
3Stability of the object's composition
If homozygous inbred plants are developed through repeated self-pollination, then genetic uniformity improves, but inbreeding depression reduces plant vigor
Solution Approach 1:
The patent segments the breeding process into two distinct functional components: homozygous inbred parent lines that provide genetic uniformity and stability, and their hybrid progeny that restore vigor through heterosis. This segmentation allows each component to fulfill its specific role without suffering from the limitations of the other.
Solution Approach 2:
The patent exploits parameter changes in heterosis expression by crossing genetically divergent inbred lines. The hybrid progeny exhibit restored vigor and improved performance parameters compared to their inbred parents, overcoming inbreeding depression while maintaining the genetic uniformity benefits of inbred parents.
4Manufacturing precision
If precise genome editing is applied to introduce specific traits, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The genome editing system utilizes the plant's own cellular machinery and repair pathways to achieve precise trait introduction. By leveraging endogenous mechanisms such as homology-directed repair, the system achieves high precision without requiring overly complex external intervention systems.
Solution Approach 2:
The patent replaces traditional mechanical breeding methods (crossing, selection, and chance recombination) with precise molecular genome editing tools. This substitution enables targeted introduction of specific traits with known precision, overcoming the randomness and time-consuming nature of conventional breeding while managing complexity through specialized molecular tools.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the hybrid corn variety designated CH010453. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CH010453, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010453 with itself or with another corn plant, such as a plant of another variety. The disclosure further relates to genetic complements of plants of variety CH010453.