Hybrid Corn CH175859 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 CH175859, 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 techniques, allowing for controlled cross-pollination and stable hybrid seed production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If self-pollination is allowed in corn breeding, then genetic diversity is maintained, but hybrid seed production efficiency decreases due to inability to control pollination
Solution Approach 1:
The patent extracts the male reproductive function from the plant by introducing cytoplasmic male sterility, which eliminates pollen production in the female parent. This allows complete control over pollination in hybrid seed production while maintaining genetic stability through controlled crossing of specific parental lines.
Solution Approach 2:
The patent uses cytoplasmic male sterility as an intermediary mechanism to control pollination. By introducing specific cytoplasmic factors that prevent self-pollination, the system enables efficient hybrid seed production without compromising genetic stability, as the sterility is controlled and reversible through specific breeding strategies.
2Adaptability or versatility
If multiple desirable traits are combined in a single hybrid variety, then agronomic performance is improved, but breeding complexity increases
Solution Approach 1:
The patent applies multi-functionality by developing hybrid varieties that simultaneously express multiple desirable traits including disease resistance, yield improvement, and adapted maturity. The breeding system uses universal parental lines with complementary traits that can be combined through controlled crossing, managing complexity through systematic trait accumulation.
Solution Approach 2:
The patent segments the breeding process into distinct stages: developing inbred parental lines with specific traits, introducing cytoplasmic male sterility for controlled pollination, and evaluating hybrid combinations. This segmentation allows systematic combination of multiple traits while managing breeding complexity through organized workflows.
3Productivity
If cytoplasmic male sterility is introduced to prevent self-pollination, then hybrid seed production is controlled, but plant reproduction is affected
Solution Approach 1:
The patent uses cytoplasmic male sterility as a controlled intermediary that temporarily affects reproduction only in the female parent during hybrid seed production. The sterility is reversible through the use of restorer lines in subsequent generations, ensuring that plant reproduction reliability is maintained while enabling controlled hybrid seed production.
Solution Approach 2:
The patent applies local quality by introducing cytoplasmic male sterility specifically in the female parental line used for hybrid seed production, while maintaining fertility in male parental lines and in subsequent commercial hybrid plants. This localized application ensures reproduction control where needed without affecting overall plant reproduction reliability.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH175859. The invention thus relates to the plants, seeds and tissue cultures of the variety CH175859, and to methods for producing a corn plant produced by crossing a corn plant of variety CH175859 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 CH175859.