Hybrid Corn CH955372 Cytoplasmic Male Sterility Breeding
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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 CH955372, 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
1Ease of manufacture
If self-pollination is allowed in corn plants, then natural pollination occurs and seed production is simplified, but genetic uniformity is reduced and hybrid variety development is limited
Solution Approach 1:
The patent applies cytoplasmic male sterility (CMS) to extract the male fertilizing function from the plant's reproductive system. The CMS line produces functional female flowers but sterile male flowers, preventing self-pollination while enabling controlled cross-pollination for hybrid seed production. This resolves the contradiction by removing the self-pollination capability to maintain genetic uniformity while preserving the overall seed production process.
Solution Approach 2:
The patent introduces a maintainer line as an intermediary substance that restores male fertility to CMS plants. The maintainer line contains restorer genes that compensate for the cytoplasmic sterility, allowing the CMS plant to produce functional pollen. This intermediary mechanism enables controlled pollination while maintaining genetic uniformity through precise control of the breeding process.
2Productivity
If multiple desirable traits are combined in hybrid corn, then agricultural productivity is improved, but breeding complexity increases
Solution Approach 1:
The patent merges multiple desirable traits into a single hybrid corn variety through controlled cross-pollination of parent lines with complementary characteristics. The hybrid combines high yield, disease resistance, pest resistance, and environmental stress tolerance in one variety. This merging approach resolves the contradiction by integrating multiple traits while managing breeding complexity through systematic cross-breeding programs.
Solution Approach 2:
The patent utilizes genetic parameter changes through cytoplasmic male sterility and restorer gene interactions to create stable hybrid varieties. By controlling the genetic parameters of the parent lines and using CMS systems, the breeding process achieves consistent phenotypic expression in the F1 hybrid. This parameter control reduces breeding complexity while maintaining high agricultural productivity through predictable trait inheritance.
3Productivity
If cytoplasmic male sterility is used to prevent self-pollination, then hybrid seed production is improved, but plant fertility is reduced
Solution Approach 1:
The patent introduces a restorer line as an intermediary that contains nuclear restorer genes capable of compensating for cytoplasmic male sterility. When the restorer line is crossed with the CMS line, the restorer genes restore male fertility to the hybrid plants. This intermediary mechanism enables high hybrid seed production through CMS while maintaining plant fertility through the restorer line, resolving the contradiction between productivity and reliability.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH955372. The invention thus relates to the plants, seeds and tissue cultures of the variety CH955372, and to methods for producing a corn plant produced by crossing a corn plant of variety CH955372 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 CH955372.