Hybrid Corn CH836028 Male Sterility Genetics
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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 CH836028, which incorporates cytoplasmic or nuclear factors for male sterility, genetic loci conferring traits like herbicide resistance and disease resistance, and the use of tissue cultures to regenerate plants with specific physiological and morphological characteristics, enabling 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 trait introduction efficiency and hybrid seed production are limited
Solution Approach 1:
The patent extracts the self-pollination capability by introducing male sterility genes (cms1, gms1, gms2) that eliminate pollen production or viability. This extraction allows controlled cross-pollination while maintaining genetic stability through cytoplasmic male sterility systems, resolving the contradiction between preventing self-pollination and maintaining genetic purity.
Solution Approach 2:
The patent uses restorer genes (Rf1, Rf2, Rf3) as intermediaries that can restore male fertility when present. These restorer genes act as mediators between the male-sterile cytoplasm and normal fertility, allowing controlled manipulation of pollination behavior while maintaining genetic stability through predictable inheritance patterns.
2Productivity
If male sterility factors are introduced to prevent self-pollination, then hybrid seed production efficiency improves, but device complexity increases
Solution Approach 1:
The patent segments the fertility control system into distinct modular components: multiple independent male sterility genes (cms1, gms1, gms2) located at different genetic loci, and corresponding restorer genes (Rf1, Rf2, Rf3). This segmentation allows flexible combination and selection of specific sterility-restorer pairs, simplifying the overall system while maintaining high hybrid production efficiency.
Solution Approach 2:
The patent changes the parameter of male fertility from a binary state (fertile/sterile) to a multi-state system controlled by different gene combinations. By introducing multiple male sterility genes with different inheritance patterns and corresponding restorer genes, the system can be tuned to achieve desired levels of sterility and fertility restoration, optimizing hybrid seed production while managing genetic complexity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH836028. The invention thus relates to the plants, seeds and tissue cultures of the variety CH836028, and to methods for producing a corn plant produced by crossing a corn plant of variety CH836028 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 CH836028.