Hybrid Corn CH174815 Male Sterility Breeding
Find Innovative SolutionsGenerate Solutions
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 CH174815, which incorporates cytoplasmic or nuclear factors for male sterility and includes genetic loci conferring traits like herbicide resistance, insect resistance, and disease resistance, along with a method for controlled cross-pollination using emasculation and self-incompatibility systems to prevent self-pollination and ensure hybrid seed production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional self-pollination breeding methods are used, then genetic stability is maintained, but hybrid seed production efficiency is limited due to inability to prevent self-pollination
Solution Approach 1:
The patent extracts and removes the male fertility function from the plant by introducing cytoplasmic male sterility factors (such as cms-D, cms-E, or cms-F cytoplasm) or nuclear male sterility genes. This extraction of the self-pollination capability forces cross-pollination, thereby improving hybrid seed production efficiency while maintaining genetic stability through controlled mating.
Solution Approach 2:
The patent introduces intermediary genetic elements (male sterility restorer genes Rf1, Rf2, or Rf3) that act as mediators. These restorer genes can selectively restore male fertility when present, allowing controlled self-pollination in specific breeding scenarios while maintaining sterility in the hybrid production system, thus balancing efficiency and genetic stability.
2Productivity
If male sterility factors are introduced to prevent self-pollination, then hybrid seed production efficiency improves, but device complexity increases due to additional genetic loci
Solution Approach 1:
The patent employs universal male sterility systems that can be applied across different corn varieties. The cytoplasmic male sterility factors (cms-D, cms-E, cms-F) and associated restorer genes serve multiple functions: preventing self-pollination in hybrids, enabling efficient hybrid seed production, and providing a standardized breeding platform that reduces overall genetic system complexity through reuse across varieties.
Solution Approach 2:
The patent utilizes parameter changes in gene expression and cytoplasmic-nuclear interactions to achieve male sterility. By changing the presence/absence of restorer genes or altering cytoplasmic factors, the system dynamically controls fertility status without requiring complex structural modifications, thereby improving efficiency while minimizing added complexity.
3Reliability
If multiple desirable traits are combined in a single hybrid variety, then agronomic quality and resistance improve, but breeding difficulty increases
Solution Approach 1:
The patent segments the breeding process into distinct components: developing inbred lines with specific resistance traits (herbicide resistance, insect resistance, disease resistance), introducing male sterility factors into selected lines, and systematically crossing these lines. This segmentation allows independent development and optimization of each trait before combination, reducing overall breeding complexity while achieving multi-trait hybrids.
Solution Approach 2:
The patent applies preliminary action by pre-establishing inbred lines with desired resistance traits and pre-introducing male sterility factors before the hybridization step. This preliminary preparation of parental lines with specific characteristics simplifies the subsequent crossing process and ensures that multiple desirable traits are already consolidated in the parental generations, reducing breeding difficulty.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH174815. The invention thus relates to the plants, seeds and tissue cultures of the variety CH174815, and to methods for producing a corn plant produced by crossing a corn plant of variety CH174815 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 CH174815.