Hybrid Maize Breeding for Stable Multi-Trait Yield Performance
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Solution Overview
Problem
Existing hybrid maize development methods struggle to combine desirable traits such as disease resistance, heat and drought tolerance, and improved yield while maintaining uniformity and stability in commercial crops.
Innovation Solution
A novel maize hybrid variety X05T061 is developed by crossing inbred varieties and introducing genetic loci for traits like male sterility, disease resistance, and altered metabolism through backcrossing and transformation, with cytoplasmically-inherited traits ensuring trait inheritance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional plant breeding methods are used to combine multiple desirable traits, then the complexity of the breeding process increases, but the uniformity and stability of the hybrid crop decreases
Solution Approach 1:
The patent segments the breeding process by using distinct inbred parent lines (e.g., inbred A and inbred B) that each carry specific desirable traits. By dividing the trait combination task into separate parental lines rather than attempting to combine all traits in a single complex parent, the method achieves both trait diversity and hybrid uniformity through controlled crossbreeding.
Solution Approach 2:
The patent applies preliminary action by developing and stabilizing inbred parent lines through multiple generations of selfing and selection before the actual hybrid cross. This preliminary inbreeding process ensures that each parent line is genetically uniform and stable, which then guarantees uniformity in the resulting hybrid when crossed, while still allowing combination of different traits from different parental lines.
2Productivity
If multiple traits are combined in a single hybrid, then the agronomic quality and yield improve, but the difficulty of maintaining trait consistency across generations increases
Solution Approach 1:
Instead of attempting to maintain multiple complex traits within a single parent line, the patent inverts the approach by distributing different traits across separate inbred parent lines. Each parent line is optimized for specific traits, and the hybrid combination achieves overall superiority. This inversion simplifies generation-to-generation consistency because each inbred parent is genetically stable, and the hybrid uniformly expresses the combination of parental traits.
3Manufacturing precision
If inbred varieties are crossed to produce hybrids, then uniformity of plant characteristics is improved, but the time and resources required for inbreeding increase
Solution Approach 1:
The patent applies self-service through self-pollination (selfing) of selected parent plants over multiple generations to create inbred lines. Each plant serves its own breeding purpose by self-pollinating to produce progeny that progressively become more genetically uniform. This self-service mechanism automatically achieves the desired uniformity without requiring external intervention for each generation, efficiently producing consistent inbred lines for hybrid production.
Data Source
AI summary
A novel maize variety designated X05T061 and seed, plants and plant parts thereof are produced by crossing inbred maize varieties. Methods for producing a maize plant by crossing hybrid maize variety X05T061 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X05T061 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X05T061, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X05T061 are provided. Methods for producing maize varieties derived from maize variety X05T061 and methods of using maize variety X05T061 are disclosed.