Maize Inbred 2DLIQ1122 Breeding via Male Sterility
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, taking six to twelve years from the first cross to the delivery of finished seed, and existing technologies face challenges in combining desirable traits such as disease resistance, drought tolerance, and high yield in a stable and agronomically sound manner.
Innovation Solution
The introduction of the novel maize variety 2DLIQ1122, which involves crossing with another maize plant to introduce desired traits through backcross conversion, genetic manipulation, and transformation, and the use of cytoplasmic or nuclear factors for male sterility to prevent self-pollination, allowing for the production of hybrid seeds with enhanced characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to combine desirable traits, then the resulting varieties have improved disease resistance and yield, but the development process takes six to twelve years
Solution Approach 1:
The patent employs preliminary action by using male sterile lines and predetermined breeding designs before the actual crossing process. The male sterile female parent is prepared in advance with specific desirable traits, and the breeding program is structured to systematically combine multiple traits through planned crosses and backcrosses, thereby accelerating the breeding process while maintaining reliability.
Solution Approach 2:
The breeding process is segmented into distinct phases: developing male sterile lines, performing initial crosses, conducting backcrosses, and selecting for desired traits. This segmentation allows parallel processing of different trait combinations and reduces the overall breeding cycle by eliminating unnecessary generational steps.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the variety achieves high yield and environmental stress tolerance, but the breeding process becomes more complex
Solution Approach 1:
The patent creates a universal male sterile line that can serve multiple breeding purposes. This single female parent line carries multiple desirable traits (disease resistance, stress tolerance, yield components) that can be combined with different male parents to produce various hybrid varieties, thereby reducing breeding program complexity through reuse of proven genetic material.
Solution Approach 2:
The male sterile line acts as an intermediary that facilitates the combination of multiple traits. By using the male sterile female parent as a mediator, breeders can systematically introduce and combine multiple desirable traits from different male parents without the complexity of managing multiple cross combinations simultaneously.
3Ease of manufacture
If self-pollination is allowed in maize breeding, then seed production is simpler, but trait uniformity and hybrid vigor are reduced
Solution Approach 1:
The patent extracts the male fertility function from the female parent by using male sterile lines. This extraction prevents self-pollination in the female parent, ensuring that only controlled cross-pollination occurs. The male sterility trait is taken out and replaced with external pollen application, thereby maintaining trait uniformity and hybrid vigor while simplifying seed production through controlled crossing.
Data Source
AI summary
A novel maize variety designated 2DLIQ1122 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety 2DLIQ1122 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into 2DLIQ1122 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby are provided. Hybrid maize seed, plants or plant parts are produced by crossing the variety 2DLIQ1122 or a locus conversion of 2DLIQ1122 with another maize variety.