Hybrid Maize Breeding for Trait Stacking and Line Stability
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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, which are crucial for commercial crop production.
Innovation Solution
A novel maize hybrid variety X87T011 is developed through careful breeding and selection, incorporating genetic loci for traits like male sterility, herbicide tolerance, and disease resistance, achieved via backcrossing and transformation, with cytoplasmically-inherited traits and regenerable tissue cultures to ensure uniformity 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 program increases, but the uniformity and stability of the hybrid may be compromised
Solution Approach 1:
The patent segments the breeding process into distinct phases: developing inbred lines with specific traits, creating the hybrid combination, and maintaining uniformity through controlled pollination. This segmentation allows each phase to be optimized independently, combining multiple desirable traits while maintaining hybrid uniformity.
Solution Approach 2:
The patent applies preliminary action by developing and stabilizing inbred parent lines before creating the hybrid. The inbred lines are prepared in advance with specific desirable traits (disease resistance, drought tolerance, etc.), ensuring that when the hybrid is created, uniformity and stability are preserved while combining multiple traits.
2Reliability
If multiple traits are introduced through backcrossing and transformation, then the agronomic quality improves, but the breeding process complexity increases
Solution Approach 1:
The patent uses inbred lines as intermediary carriers to introduce multiple desirable traits (disease resistance, insect resistance, drought tolerance) into the hybrid. These inbred lines serve as mediators that systematically transfer specific traits through controlled backcrossing and transformation, improving agronomic quality while managing breeding process complexity.
Solution Approach 2:
The patent applies parameter changes by systematically modifying genetic parameters through controlled backcrossing and transformation to introduce specific traits. This allows precise control over which traits are introduced and how they are integrated, improving agronomic quality while managing the complexity of the breeding process.
3Manufacturing precision
If cytoplasmic male sterility is introduced to prevent self-pollination, then hybrid purity is maintained, but the genetic system complexity increases
Solution Approach 1:
The patent employs cytoplasmic male sterility as a self-service mechanism where the female parent automatically prevents self-pollination through genetic control. This eliminates the need for manual detasseling or other complex interventions, maintaining hybrid purity while managing genetic system complexity through a self-regulating biological mechanism.
Data Source
AI summary
A novel maize variety designated X90V907 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 X90V907 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X90V907 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X90V907, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X90V907 are provided. Methods for producing maize varieties derived from maize variety X90V907 and methods of using maize variety X90V907 are disclosed.