Hybrid Corn CH803657 Cytoplasmic Male Sterility Breeding
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 CH803657, which incorporates genetic modifications and cytoplasmic male sterility to prevent self-pollination, along with specific traits like herbicide resistance and disease resistance, achieved through genetic transformation and backcrossing techniques, allowing for controlled cross-pollination and stable hybrid seed production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical emasculation is used to prevent self-pollination, then hybrid seed production is achieved, but labor intensity and production cost increase
Solution Approach 1:
The patent replaces the mechanical system of physical emasculation with a biological system - cytoplasmic male sterility (CMS). The CMS trait genetically prevents pollen production in the female parent, eliminating the need for manual or mechanical removal of male organs. This biological substitution maintains reliable prevention of self-pollination while dramatically reducing labor intensity and production costs.
2Productivity
If cytoplasmic male sterility is introduced to prevent self-pollination, then breeding efficiency increases, but genetic modification complexity increases
Solution Approach 1:
The patent extracts the male fertility function from the cytoplasm by introducing a specific cytoplasmic male sterility (CMS) trait. This isolated genetic element can be independently manipulated and transferred between lines without affecting the rest of the genome. By taking out just the CMS trait rather than modifying the entire genetic system, the complexity of genetic modification is reduced while maintaining high breeding efficiency.
3Reliability
If hybrid varieties are developed to combine multiple desirable traits, then crop performance improves, but breeding time and resource requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-developing and maintaining pure breeding parental lines with specific desirable traits (disease resistance, yield components, stress tolerance) before hybridization. The CMS trait is also established in advance in the female parent line. When these pre-prepared lines are crossed, the hybrid automatically inherits multiple desirable traits without requiring additional breeding time for trait combination in later generations, thus reducing overall breeding time while maintaining high crop performance.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH803657. The invention thus relates to the plants, seeds and tissue cultures of the variety CH803657, and to methods for producing a corn plant produced by crossing a corn plant of variety CH803657 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 CH803657.