Hybrid Corn CH846107 Breeding via Male Sterility Segmentation
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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 CH846107, which incorporates cytoplasmic or nuclear factors for male sterility and introduces genetic loci conferring traits like herbicide resistance, disease resistance, and altered metabolism, using backcrossing and genetic transformation techniques to ensure trait stability and expression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional self-pollination breeding methods are used, then genetic uniformity can be maintained, but trait introduction efficiency and hybrid seed production are limited
Solution Approach 1:
The patent extracts and removes the self-pollination capability by introducing male sterility genes (cms-M, gms1, gms2) that eliminate pollen production or function. This extraction of the self-pollination function allows for efficient cross-pollination and hybrid seed production while maintaining genetic stability through controlled mating systems.
Solution Approach 2:
The patent introduces restorer genes (Rf1, Rf2, Rf3) as intermediary elements that can restore male fertility when paired with specific male sterility genes. These restorer genes act as mediators that control the expression of male sterility, enabling precise control over self-pollination and cross-pollination processes to achieve both trait introduction efficiency and genetic stability.
2Productivity
If male sterility systems are introduced to prevent self-pollination, then hybrid seed production efficiency improves, but genetic complexity increases
Solution Approach 1:
The patent segments the male sterility system into distinct, independently inheritable components: multiple cytoplasmic male sterility genes (cms-M, gms1, gms2) and multiple nuclear restorer genes (Rf1, Rf2, Rf3). This segmentation allows breeders to select and combine specific combinations based on desired traits, simplifying the management of genetic complexity while maintaining high hybrid seed production efficiency.
Solution Approach 2:
The patent changes the parameters of male sterility expression by introducing multiple genes with different inheritance patterns (cytoplasmic vs. nuclear). This allows for flexible control of fertility parameters, enabling the system to achieve high hybrid seed production efficiency while managing genetic complexity through selectable gene combinations.
3Reliability
If multiple desirable traits are combined in a single hybrid, then yield and resistance improve, but breeding time and process complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing inbred lines that already possess specific desirable traits (disease resistance, yield characteristics) before hybridization. The male sterility and restorer gene systems are also pre-integrated into these inbred lines, allowing for direct hybridization without extensive additional breeding steps, thereby reducing overall breeding time while maintaining multiple desirable traits.
Solution Approach 2:
The patent merges multiple desirable traits (disease resistance genes, yield-enhancing genes, male sterility genes, and restorer genes) into unified inbred parental lines. This merging allows for the simultaneous introduction of multiple traits into a single hybrid variety through a single cross, significantly reducing breeding time and process complexity compared to sequential trait introduction.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH846107. The invention thus relates to the plants, seeds and tissue cultures of the variety CH846107, and to methods for producing a corn plant produced by crossing a corn plant of variety CH846107 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 CH846107.