Hybrid Corn CH945175 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 trait introduction and hybrid seed production.
Innovation Solution
The development of the hybrid corn variety CH945175, 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 methods, allowing for controlled cross-pollination and stable trait introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional self-pollination breeding methods are used, then genetic stability is maintained, but self-pollination cannot be prevented and hybrid seed production efficiency is limited
Solution Approach 1:
The patent extracts and removes the self-pollination capability from the corn plant by introducing cytoplasmic male sterility genes that eliminate pollen production. This allows the female parent to receive pollen only from desired male parents, preventing unwanted self-pollination while maintaining genetic stability of the hybrid offspring.
Solution Approach 2:
The patent uses cytoplasmic male sterility as an intermediary mechanism to control pollination. The sterile cytoplasm acts as a mediator that blocks self-pollination pathways while allowing controlled cross-pollination, thereby improving hybrid seed production efficiency without compromising genetic stability.
2Adaptability or versatility
If cross-pollination is used to develop hybrid varieties, then desirable traits can be combined, but self-pollination control becomes difficult and genetic stability may be compromised
Solution Approach 1:
The patent removes the self-pollination pathway by inducing cytoplasmic male sterility in the female parent, ensuring that only controlled cross-pollination occurs. This enables reliable combination of desirable traits from different parents while maintaining genetic stability of the hybrid.
Solution Approach 2:
The patent changes the pollination parameter by altering the fertility status of the female parent through cytoplasmic male sterility. This parameter change ensures that cross-pollination is the only viable pollination mode, enabling controlled trait combination while preserving genetic stability.
3Productivity
If cytoplasmic male sterility is introduced to prevent self-pollination, then hybrid seed production efficiency improves, but the complexity of breeding programs increases
Solution Approach 1:
The patent employs self-service mechanisms where the cytoplasmic male sterility system automatically prevents self-pollination without requiring external intervention. The sterile cytoplasm self-regulates the pollination process, improving hybrid seed production efficiency while the standardized protocols minimize breeding program complexity.
Solution Approach 2:
The patent utilizes parameter changes in the cytoplasmic sterility system to create a binary state (sterile/fertile) that simplifies control. By changing the fertility parameter through known cytoplasmic genes, the system achieves automatic self-pollination prevention, improving efficiency while maintaining manageable breeding program complexity through standardized genetic markers.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH945175. The invention thus relates to the plants, seeds and tissue cultures of the variety CH945175, and to methods for producing a corn plant produced by crossing a corn plant of variety CH945175 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 CH945175.