Hybrid Corn CH999869 Cytoplasmic Male Sterility Seed Production
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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 CH999869, which incorporates genetic modifications and cytoplasmic male sterility traits to prevent self-pollination, along with specific loci conferring herbicide resistance, insect 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 conventional corn breeding methods are used, then hybrid varieties can be developed, but self-pollination occurs which reduces the efficiency of hybrid seed production
Solution Approach 1:
The patent removes the functional capability of self-pollination from the corn plant by introducing cytoplasmic male sterility (CMS) traits. This extracts the self-pollination function from the plant's reproductive system, preventing it from occurring and thereby ensuring that only cross-pollination produces hybrid seeds, which directly resolves the contradiction between hybrid seed production efficiency and self-pollination prevention
Solution Approach 2:
The patent introduces cytoplasmic male sterility (CMS) as an intermediary mechanism between the plant's genetic makeup and its reproductive behavior. CMS acts as a mediator that blocks self-pollination while allowing controlled cross-pollination, thus enabling efficient hybrid seed production without the confounding effect of self-pollination
2Adaptability or versatility
If multiple desirable traits are combined in a single hybrid variety, then agricultural performance improves, but genetic stability becomes difficult to maintain
Solution Approach 1:
The patent segments the genetic material into distinct components: cytoplasmic genes (for male sterility and hybridity) and nuclear genes (for various desirable traits such as disease resistance, yield, and stress tolerance). This segmentation allows each component to be independently selected, combined, and stabilized, enabling the integration of multiple desirable traits while maintaining overall genetic stability through controlled hybridization protocols
Solution Approach 2:
The patent utilizes changes in genetic parameters through controlled cross-pollination and selection processes. By manipulating breeding parameters such as pollination control, selection criteria, and generation management, the patent achieves both the combination of multiple desirable traits and the maintenance of genetic stability in the hybrid variety
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH999869. The invention thus relates to the plants, seeds and tissue cultures of the variety CH999869, and to methods for producing a corn plant produced by crossing a corn plant of variety CH999869 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 CH999869.