Hybrid Corn CH273349 CMS Breeding for Seed Efficiency
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing hybrid varieties that combine desirable traits such as high yield, disease resistance, and uniformity, while maintaining genetic stability and avoiding self-pollination, which limits the efficiency of hybrid seed production.
Innovation Solution
The development of the hybrid corn variety CH273349, which incorporates genetic modifications and cytoplasmic male sterility traits to prevent self-pollination, along with specific genetic loci conferring herbicide resistance, disease resistance, and other desirable characteristics, using advanced breeding methods and genetic transformation techniques like CRISPR-Cas systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional self-pollination breeding methods are used, then genetic stability is maintained, but hybrid seed production efficiency is limited due to inability to prevent self-pollination
Solution Approach 1:
The patent applies preliminary anti-action by introducing cytoplasmic male sterility traits before hybrid seed production. The female parent is pre-modified with CMS genes that prevent pollen formation, thereby preemptively blocking self-pollination before it can occur. This allows efficient hybrid seed production while maintaining genetic stability through controlled cross-pollination only.
Solution Approach 2:
The patent uses genetic modification systems as intermediaries to control pollination. Specific genetic loci and cytoplasmic factors act as mediators between the parental lines, enabling precise control over which pollen fertilizes which ovule. This intermediary mechanism ensures hybrid seed production efficiency while maintaining genetic stability through controlled inheritance patterns.
2Reliability
If multiple desirable traits are combined in hybrid varieties, then yield and resistance improve, but maintaining genetic stability and preventing self-pollination becomes more difficult
Solution Approach 1:
The patent segments the breeding program into distinct modular components: CMS-based male sterility systems, specific genetic loci for trait inheritance, and controlled cross-pollination protocols. Each segment handles a specific function (preventing self-pollination, conferring resistance, ensuring uniformity), making the overall complex breeding program more manageable while achieving multiple desirable traits simultaneously.
Solution Approach 2:
The patent changes key breeding parameters by introducing cytoplasmic male sterility and specific genetic modifications. These parameter changes fundamentally alter the pollination dynamics and inheritance patterns, enabling reliable production of hybrids with multiple desirable traits while maintaining genetic stability through controlled genetic architecture.
3Productivity
If genetic modifications are introduced to prevent self-pollination, then hybrid seed production efficiency improves, but the complexity of breeding programs increases
Solution Approach 1:
The patent applies self-service by using the plant's own biological systems to prevent self-pollination. Cytoplasmic male sterility utilizes the plant's mitochondrial genome and natural development processes to autonomously prevent pollen formation. This self-service mechanism improves hybrid seed production efficiency without requiring complex external intervention, thereby limiting the increase in breeding program complexity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH273349. The invention thus relates to the plants, seeds and tissue cultures of the variety CH273349, and to methods for producing a corn plant produced by crossing a corn plant of variety CH273349 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 CH273349.