Maize Variety X6R223 Trait Segmentation 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 high yield in a single hybrid, while maintaining uniformity and agronomic quality, especially under stress conditions.
Innovation Solution
The development of the maize variety X6R223, produced by crossing proprietary Pioneer Hi-Bred International inbred varieties, which incorporates traits like drought resistance, disease resistance, and improved agronomic characteristics through backcross conversion and transformation processes, allowing for the introgression of specific traits and the production of derived varieties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding is used to combine desirable traits, then disease resistance and yield may be improved, but uniformity of plant characteristics and agronomic quality deteriorate
Solution Approach 1:
The breeding program segments the complex trait combination task into separate parental lines, each contributing specific desirable traits (disease resistance, drought tolerance, yield components). By dividing the genetic contribution into distinct parental segments, uniformity is maintained while combining multiple beneficial traits in the hybrid offspring.
Solution Approach 2:
The patent develops inbred lines that serve multiple functions: they provide disease resistance, drought tolerance, and uniform agronomic characteristics simultaneously. These multi-functional parental lines are then crossed to produce hybrids that inherit the combined benefits, resolving the contradiction between trait combination and uniformity.
2Productivity
If multiple desirable traits are combined in a single hybrid, then yield and stress tolerance improve, but the complexity of breeding processes increases
Solution Approach 1:
The breeding program performs preliminary actions by developing and stabilizing multiple inbred parental lines before combining them. Each parental line is pre-selected and characterized for specific traits (disease resistance, drought tolerance, yield components), which simplifies the final hybridization step and reduces overall breeding complexity despite the multiple traits being combined.
3Productivity
If uniformity of plant characteristics is maintained for mechanical harvesting, then harvest efficiency improves, but adaptability to different environmental conditions deteriorates
Solution Approach 1:
The patent applies local quality by assigning different functional characteristics to different parental lines: one parent contributes uniformity traits for mechanical harvesting, while the other contributes stress tolerance and adaptability traits. The hybrid inherits both sets of local qualities, allowing simultaneous achievement of harvest efficiency and environmental adaptability.
Data Source
AI summary
A novel maize variety designated X6R223 and seed, plants and plant parts thereof, produced by crossing Pioneer Hi-Bred International, Inc. proprietary inbred maize varieties. Methods for producing a maize plant that comprises crossing maize variety X6R223 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X6R223 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. This invention relates to the maize variety X6R223, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X6R223. This invention further relates to methods for producing maize varieties derived from maize variety X6R223 and to the maize varieties derived by the use of those methods.