Hybrid Corn CH897928 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 CH897928, which incorporates genetic modifications and cytoplasmic male sterility traits to prevent self-pollination, along with specific genetic loci conferring herbicide resistance, insect resistance, and other desirable characteristics, using advanced breeding methods and genetic transformation techniques like genome editing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional breeding methods are used to develop hybrid corn varieties, then genetic diversity and desirable traits can be combined, but self-pollination occurs which reduces hybrid seed production efficiency
Solution Approach 1:
The patent extracts and removes the male reproductive capability from the female parent by introducing cytoplasmic male sterility (CMS) genes. This eliminates pollen production in the female parent, completely preventing self-pollination and ensuring 100% cross-pollination efficiency in hybrid seed production
Solution Approach 2:
The patent uses a restorer gene as an intermediary element that, when introduced into the hybrid, restores male fertility. This allows the hybrid to be fertile for agricultural production while the parent lines maintain sterility control during hybrid seed production
2Productivity
If multiple desirable traits are combined in hybrid corn varieties, then yield and resistance improve, but genetic stability becomes difficult to maintain
Solution Approach 1:
The patent segments the genetic material into distinct parental lines, each contributing specific desirable traits. The female parent contributes CMS and disease resistance genes, while the male parent contributes fertility restoration and yield-related genes. This segmentation allows systematic combination of traits while maintaining genetic stability through controlled crosses
Solution Approach 2:
The patent changes the cytoplasmic parameter by introducing CMS genes from specific cytoplasms (such as T-cytoplasm, S-cytoplasm, or C-ms cytoplasm). This cytoplasmic modification provides stable inheritance of male sterility and associated resistance traits across generations
3Productivity
If cytoplasmic male sterility is introduced to prevent self-pollination, then cross-pollination efficiency improves, but plant fertility is reduced
Solution Approach 1:
The patent inverts the fertility status by making the female parent sterile (unable to produce pollen) while the male parent remains fertile (able to produce pollen). This inversion ensures that the sterile parent must receive pollen from the fertile parent, guaranteeing cross-pollination while the fertile parent can contribute pollen to multiple sterile parents
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH897928. The invention thus relates to the plants, seeds and tissue cultures of the variety CH897928, and to methods for producing a corn plant produced by crossing a corn plant of variety CH897928 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 CH897928.