Hybrid Corn CH011041 Cytoplasmic Male Sterility Breeding
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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 CH011041, 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 cross-pollination control is improved, 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 formation in the female parent, eliminating the need for manual or mechanical removal of male organs. This biological substitution maintains reliable cross-pollination control while dramatically reducing labor intensity and production costs.
2Productivity
If cytoplasmic male sterility is introduced to prevent self-pollination, then breeding efficiency is improved, but genetic complexity increases
Solution Approach 1:
The patent extracts the male fertility function from the cytoplasmic system by introducing a specific restorer gene (Rf) that can override the cytoplasmic male sterility (S- cyoplasm). This allows selective restoration of fertility only when needed for producing F1 hybrids, while maintaining sterility in the F1 generation for uniform seed production. The extraction principle separates the sterility function from the fertility function, managing genetic complexity through functional separation.
Solution Approach 2:
The patent applies local quality by making the restorer gene expression conditional and location-specific. The Rf gene is strategically placed in the breeding program to restore fertility only in specific parental lines that carry the S- cytoplasm, while other lines maintain sterility. This localized application of fertility restoration optimizes the breeding system by applying genetic complexity only where necessary.
3Reliability
If hybrid varieties are developed to combine desirable traits, then crop performance is improved, but breeding time and resource investment increase
Solution Approach 1:
The patent employs preliminary action by pre-developing and maintaining pure-line parental varieties with known, stable genetic compositions and desired traits before hybridization. The parental lines are thoroughly characterized and tested in advance, ensuring that when crossing occurs, the F1 hybrids inherit predictable combinations of desirable traits. This preliminary preparation reduces the time needed for later selection and evaluation of hybrid progeny.
Solution Approach 2:
The patent utilizes self-service through the heterosis effect, where the F1 hybrid automatically exhibits superior performance and uniformity without requiring further intervention. The hybrid vigor and trait uniformity manifest naturally in the first generation, allowing breeders to directly utilize the F1 seeds for production without extensive additional breeding cycles or selection procedures.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH011041. The invention thus relates to the plants, seeds and tissue cultures of the variety CH011041, and to methods for producing a corn plant produced by crossing a corn plant of variety CH011041 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 CH011041.