Maize Hybrid X98T033 With CMS-Based Stable Multi-Trait Breeding
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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 X98T033 is developed by crossing two inbred varieties, incorporating genetic loci for traits like male sterility, herbicide tolerance, and disease resistance through backcrossing and transformation, with cytoplasmically-inherited traits for male sterility 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 process increases, but the uniformity and stability of the hybrid maize variety deteriorates
Solution Approach 1:
The patent segments the breeding process by using distinct inbred parent lines (e.g., inbred A and inbred B) that each contribute specific desirable traits. By dividing the complex trait combination task into separate parental contributions, the hybrid maintains uniformity while combining multiple traits. The inbred lines are developed through separate breeding programs, then crossed to produce the hybrid variety X98T033 with stabilized characteristics.
Solution Approach 2:
The patent uses inbred lines that are genetically stabilized and can be repeatedly copied to produce consistent hybrid offspring. The inbred parent lines serve as stable genetic templates that can be propagated and used to produce uniform hybrid seeds across multiple seasons, ensuring consistency in the hybrid maize variety while combining desirable traits from different parental lines.
2Adaptability or versatility
If multiple genetic loci are introduced through backcrossing and transformation, then the number of desirable traits increases, but the device complexity increases
Solution Approach 1:
The patent merges multiple breeding techniques (traditional crossbreeding, backcrossing, and genetic transformation) into a unified breeding program. By combining these methods systematically, the patent introduces multiple genetic loci for desirable traits (disease resistance, herbicide tolerance, yield improvement) while managing the overall process complexity through integrated breeding protocols and standardized procedures.
Solution Approach 2:
The patent performs preliminary development of inbred parent lines with specific traits before combining them in the final hybrid cross. Desired genetic loci are introduced and stabilized in the inbred lines through preliminary backcrossing and transformation operations, so that the final hybridization step simply combines pre-prepared genetic components, reducing the complexity of the overall process.
3Ease of operation
If cytoplasmic male sterility is introduced to prevent self-pollination, then the control of pollination improves, but the genetic complexity increases
Solution Approach 1:
The patent uses cytoplasmic male sterility (CMS) systems where the female parent line carries cytoplasmic genes that automatically prevent pollen production, eliminating the need for manual detasseling operations. The sterile female plants self-service by naturally preventing self-pollination, ensuring cross-pollination occurs only with the male parent line. This biological self-regulation simplifies hybrid seed production operations while the genetic complexity is contained within the cytoplasmic inheritance system.
Data Source
AI summary
A novel maize variety designated X98T033 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 X98T033 with another maize plant are disclosed. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X98T033 through backcrossing or genetic transformation, and to the maize seed, plant and plant part produced thereby are described. Maize variety X98T033, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X98T033 are provided. Methods for producing maize varieties derived from maize variety X98T033 and methods of using maize variety X98T033 are disclosed.