Hybrid Maize X18B749 Marker-Assisted Trait Selection
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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 hybrid maize varieties.
Innovation Solution
Development of the hybrid maize variety X18B749, produced by crossing proprietary Pioneer Hi-Bred International inbred varieties, which incorporates locus conversions and transformation processes to introduce specific traits, enhancing resistance to abiotic stresses and improving agronomic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding techniques are used to combine desirable traits, then disease resistance and drought tolerance can be improved, but the time required to develop new varieties increases and uniformity may be compromised
Solution Approach 1:
The patent applies parameter changes by utilizing molecular markers to identify and select specific genetic loci associated with desirable traits. This molecular-level parameter detection allows breeders to track and combine multiple traits simultaneously through marker-assisted selection, dramatically reducing the time required compared to traditional phenotypic selection methods while maintaining reliable disease resistance and drought tolerance
2Productivity
If multiple desirable traits are combined in a single hybrid, then yield and stress resistance improve, but maintaining uniformity of plant characteristics becomes more difficult
Solution Approach 1:
The patent applies segmentation by breaking down complex trait combinations into discrete molecular marker loci. Each desirable trait (disease resistance, drought tolerance, yield components) is associated with specific marker loci that can be independently tracked and selected. This allows precise control over which trait combinations are present in each plant, ensuring uniformity even when multiple traits are combined in the final hybrid variety
3Reliability
If advanced genetic modification techniques are integrated, then resistance to abiotic stresses and agronomic performance improve, but the complexity of the breeding process increases
Solution Approach 1:
The patent applies the intermediary principle by using molecular markers as mediators between the complex genetic makeup and the desired phenotypic traits. These markers serve as simple, detectable indicators that bridge the gap between complex genomic information and selectable traits. The markers enable breeders to indirectly select for complex stress resistance traits through simple molecular detection, reducing process complexity while improving reliability
Data Source
AI summary
A novel maize variety designated X18B749 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 hybrid maize variety X18B749 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X18B749 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. This invention relates to the maize variety X18B749, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X18B749. This invention further relates to methods for producing maize varieties derived from maize variety X18B749.