Maize Inbred PH17SN Breeding for Disease Resistance and Uniformity
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Solution Overview
Problem
Current maize breeding techniques face challenges in combining desirable traits such as disease resistance, drought tolerance, and uniformity, which are essential for efficient crop production and mechanical harvesting.
Innovation Solution
Development of the novel maize variety PH17SN, which is homozygous and can be reproduced through self-pollination, combined with advanced breeding methods like backcrossing and transformation to introduce desired traits, resulting in a hybrid with improved agronomic qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding methods are used to combine desirable traits, then disease resistance and drought tolerance can be achieved, but the time to crop maturity increases and uniformity of plant characteristics decreases
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, drought tolerance) before hybridization. The inbred lines are developed and evaluated in advance through systematic breeding programs, allowing the hybrid to inherit these pre-validated traits without requiring additional time for trait verification during the hybrid development process.
Solution Approach 2:
The patent utilizes parameter changes by transitioning from traditional gradual breeding to a structured inbred-hybrid system that accelerates genetic improvement. By using inbred lines with fixed genetic parameters and combining them through hybridization, the system achieves rapid fixation of desirable traits while maintaining uniformity, thereby reducing the time required to develop disease-resistant varieties with consistent performance.
2Reliability
If traditional plant breeding methods are used to combine desirable traits, then drought tolerance can be achieved, but uniformity of plant characteristics such as germination, stand establishment, growth rate, maturity, plant height and ear height decreases
Solution Approach 1:
The patent applies segmentation by dividing the breeding process into distinct stages: developing separate inbred lines with specific traits, evaluating them independently, and then combining them through controlled hybridization. This segmentation allows each parent line to be optimized for specific functions (drought tolerance, uniformity) before combination, ensuring that the hybrid inherits both traits with high uniformity across all plant characteristics including germination, stand establishment, growth rate, maturity, plant height, and ear height.
Solution Approach 2:
The patent utilizes homogeneity by using inbred lines that are genetically homogeneous and breed true. The inbred parent lines are developed through multiple generations of selfing to achieve genetic uniformity, ensuring that when crossed, they produce hybrids with consistent and uniform expression of desirable traits such as drought tolerance, germination uniformity, stand establishment, growth rate, maturity, plant height, and ear height across the entire population.
3Manufacturing precision
If inbred lines are used as parents for hybrid production, then uniformity and desirable traits can be achieved, but the complexity of the breeding process increases
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into specialized modules: one for developing inbred lines with specific traits, another for evaluating and characterizing them, and a final module for hybridization and seed production. This modular segmentation makes the complex process more manageable by assigning specific functions to each module, reducing overall system complexity while maintaining high uniformity in the final hybrid product.
Solution Approach 2:
The patent utilizes parameter changes by transitioning from complex multi-generational breeding to a streamlined inbred-hybrid system. By changing the breeding parameters to use fully inbred parent lines with fixed genetic compositions, the system simplifies the production process while maintaining uniformity. The inbred lines serve as stable, reproducible units that can be consistently combined to produce uniform hybrids, reducing the complexity of ongoing breeding operations.
Data Source
AI summary
A novel maize variety designated PH17SN and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH17SN with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH17SN through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the variety PH17SN or a locus conversion of PH17SN with another maize variety.