Hybrid Corn Seed Production Using Male Sterility and Controlled Pollination
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Solution Overview
Problem
Existing corn breeding techniques struggle to develop hybrids with uniformity and desirable traits such as yield, disease resistance, and drought tolerance, while maintaining genetic stability and commercial viability.
Innovation Solution
The development of the hybrid corn variety CH010568, which incorporates cytoplasmic and nuclear factors for male sterility, genetic modifications for traits like herbicide resistance, and a method of controlled cross-pollination to ensure genetic purity, along with tissue culture techniques for regenerating plants with specific characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional breeding methods are used to develop corn hybrids, then genetic diversity can be maintained, but uniformity and genetic stability of the hybrid are compromised
Solution Approach 1:
The patent segments the breeding process into distinct phases: developing homozygous inbred lines through repeated self-pollination, then crossing these stabilized lines to produce uniform hybrids. This segmentation allows genetic stability to be achieved in the parental lines while the hybrid combines their traits uniformly
Solution Approach 2:
The patent creates true-breeding inbred lines that serve as stable genetic copies. Through repeated self-pollination over multiple generations, the inbred lines become homozygous at all loci, creating uniform genetic copies that can be consistently crossed to produce uniform hybrid progeny
2Manufacturing precision
If self-pollination is used to develop inbred lines, then genetic uniformity is achieved, but the time required for breeding is extended
Solution Approach 1:
The patent performs preliminary self-pollination and selection actions over multiple generations to establish homozygous inbred lines before the actual hybrid cross. This preliminary action of creating stable inbred parents accelerates the overall breeding process by ensuring uniformity is achieved beforehand, so the hybrid production itself is efficient
Solution Approach 2:
The patent employs periodic self-pollination cycles over multiple generations to progressively increase homozygosity. This periodic action of repeated selfing with selection at each generation systematically achieves genetic uniformity while tracking progress toward the breeding goal
3Adaptability or versatility
If cross-pollination is used to produce hybrids, then desirable traits from different parents are combined, but genetic purity and uniformity of the hybrid population are reduced
Solution Approach 1:
The patent applies local quality by creating specialized inbred lines with specific desirable traits (e.g., disease resistance in one parent, yield in another), then crossing them to produce hybrids that uniformly express the combination of these localized traits. Each inbred parent contributes specific quality characteristics
4Ease of manufacture
If male sterility factors are introduced to prevent self-pollination, then hybrid seed production is facilitated, but the complexity of the breeding system increases
Solution Approach 1:
The patent extracts the male fertility function from the hybrid seed production system by introducing male sterility factors in the female parent. This extraction eliminates the need for manual emasculation and ensures all seed produced is hybrid seed, facilitating easier hybrid seed production despite the added genetic complexity
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the hybrid corn variety designated CH010568. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CH010568, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010568 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 CH010568.