Maize Variety X7H274 Trait Introgression for Agronomic Stability
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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 while maintaining uniformity and stability in maize varieties.
Innovation Solution
The development of the maize variety X7H274, produced by crossing proprietary Pioneer Hi-Bred International inbred varieties, which incorporates traits through locus conversion and transformation, enabling the introduction of desirable genetic material and improving agronomic performance.
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 introduced, but uniformity and stability of the maize variety deteriorates
Solution Approach 1:
The patent extracts specific desirable traits (disease resistance, drought tolerance) from donor parent varieties and introduces them into the base variety X7H274 through controlled crossing and selection. This allows the base variety's uniform genetic background to be preserved while incorporating discrete beneficial traits from external sources, thereby maintaining both reliability improvements and compositional stability.
Solution Approach 2:
The patent applies local quality by making specific genetic modifications at targeted loci within the maize genome rather than进行全面 breeding. Through locus conversion and transformation, only specific regions of the genome are altered to introduce desired traits, while the rest of the genome maintains the uniform characteristics of the base variety X7H274, thus achieving trait improvement without compromising overall uniformity.
2Productivity
If multiple desirable traits are combined in a single hybrid, then agronomic performance improves, but the complexity of breeding processes increases
Solution Approach 1:
The patent employs preliminary action by pre-selecting and characterizing inbred parent varieties with specific desirable traits before combining them. The base variety X7H274 and donor parents are individually developed and evaluated for specific traits (disease resistance, drought tolerance, yield components) beforehand, which streamlines the subsequent crossing and selection processes to efficiently produce multi-trait hybrids without excessive complexity.
Solution Approach 2:
The patent uses controlled crossing as an intermediary mechanism to combine multiple desirable traits from different parent varieties into a single hybrid. By using defined inbred parents and systematic breeding approaches, the complex task of combining multiple traits is mediated through structured genetic crosses and selection, making the process manageable and reproducible while achieving high agronomic performance.
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 parameter changes by modifying specific genetic parameters (disease resistance genes, drought tolerance genes) within the uniform genetic background of base variety X7H274. This allows the creation of hybrids with consistent morphological characteristics (for mechanical harvesting) while incorporating genetic variations that provide adaptability to different environmental conditions through targeted trait introduction from diverse donor parents.
Data Source
AI summary
A novel maize variety designated X7H274 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 X7H274 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X7H274 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. This invention relates to the maize variety X7H274, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X7H274. This invention further relates to methods for producing maize varieties derived from maize variety X7H274.