Hybrid Corn Variety CH010489 With Male Sterility for Pollination Control
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Solution Overview
Problem
Existing corn breeding techniques struggle to develop hybrids with uniformity and stability, incorporating desirable traits such as yield, disease resistance, and drought tolerance, while maintaining efficient cross-pollination and self-incompatibility mechanisms.
Innovation Solution
The development of the hybrid corn variety CH010489, which includes genetic modifications for traits like male sterility, herbicide resistance, and disease resistance, achieved through backcrossing and genetic transformation techniques, ensuring uniformity and stability, and utilizing cytoplasmic factors for self-incompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical emasculation is used during hybrid seed production, then self-pollination can be prevented, but the production process becomes complex and labor-intensive
Solution Approach 1:
The patent replaces the mechanical process of physical emasculation with a biological mechanism (male sterility genes) that naturally prevents pollen production. This substitution eliminates the need for manual or mechanical removal of male reproductive organs, thereby simplifying the hybrid seed production process while maintaining reliable prevention of self-pollination.
Solution Approach 2:
The male sterile plants automatically prevent self-pollination through their own biological characteristics (inability to produce functional pollen) without requiring external intervention for emasculation. The plant's genetic makeup itself provides the mechanism for preventing self-pollination, making the system self-regulating and reducing labor requirements.
2Reliability
If hybrid varieties are developed to combine multiple desirable traits, then yield and resistance are improved, but maintaining genetic stability becomes more difficult
Solution Approach 1:
The patent segments the genetic material into distinct male sterile and fertile parent lines, each with specific desirable traits. By maintaining separate homozygous inbred lines with defined genetic compositions and crossing them to produce hybrid progeny, the system preserves genetic stability within each parent line while combining their advantages in the hybrid generation, thereby achieving both trait improvement and genetic control.
3Ease of manufacture
If male sterile plants are used to prevent self-pollination, then hybrid seed production is simplified, but the ability to produce pollen is lost
Solution Approach 1:
The patent applies different genetic qualities to different parental lines: one parent line is engineered with male sterility (lacking pollen production capability) specifically for its role as the female parent in hybrid seed production, while the other parent line maintains full fertility to provide pollen. This localized application of male sterility to only where needed (in the female parent during hybridization) simplifies production without unnecessarily affecting pollen production in the male parent.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the hybrid corn variety designated CH010489. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CH010489, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010489 with itself or with another corn plant, such as a plant of another variety. The disclosure further relates to genetic complements of plants of variety CH010489.