Inbred Corn Line G07-NPAX5290 Breeding Segmentation
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Solution Overview
Problem
The development of inbred corn lines with desirable agronomic traits is challenging due to the complexity of genetic systems governing yield and adaptability, requiring extensive breeding and selection to achieve uniformity and regional adaptability, especially in the Corn Belt where specific regional issues like Gray Leaf Spot and CLN pose difficulties.
Innovation Solution
The introduction of the inbred corn line G07-NPAX5290, which combines specific traits such as male sterility systems, transgenic genes for resistance, and modified starch traits, along with a method for producing hybrid seed using tissue culture and marker-assisted breeding to enhance breeding efficiency and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional open-pollinated varieties are used, then genetic diversity is maintained, but yield increases are limited to incremental levels
Solution Approach 1:
The breeding program segments the development process into distinct phases: creating inbred lines through repeated selfing, testing these lines in controlled trials, and then combining them into hybrids. This segmentation allows systematic improvement of yield while managing breeding complexity through structured procedures.
Solution Approach 2:
The patent applies preliminary action by pre-developing and evaluating multiple inbred lines before combining them into hybrids. Inbred lines are created through several generations of selfing and selected for desirable traits beforehand, ensuring that when hybrids are produced, they inherit the best combinations of traits for maximum yield.
2Reliability
If inbred lines are developed through extensive selfing and selection, then uniformity and regional adaptability are achieved, but breeding time and complexity increase
Solution Approach 1:
Inbred lines are developed through preliminary selfing and selection processes before being combined into hybrids. This preliminary action ensures that lines are uniformly adapted to regional conditions beforehand, reducing the need for extensive field testing of final hybrid combinations and accelerating the overall breeding timeline.
Solution Approach 2:
The patent employs partial action by focusing selection efforts on specific key traits relevant to regional adaptability rather than attempting to optimize all possible traits simultaneously. This targeted approach achieves sufficient regional adaptability while reducing the time and complexity of the breeding process.
3Productivity
If CMS systems are introduced to eliminate detasseling, then hybrid seed production efficiency improves, but poor agronomic performance traits are introduced
Solution Approach 1:
The patent extracts the male sterility trait from the CMS line and combines it with agronomically superior inbred lines. By separating the male sterility function from the agronomic performance traits, the hybrid inherits efficient seed production from the sterile parent while gaining robust agronomic characteristics from the fertile parent, thus resolving the trade-off between efficiency and performance.
Solution Approach 2:
The hybrid combines genetic material from two different inbred lines: one providing male sterility for efficient seed production and another providing superior agronomic traits. This composite approach creates a hybrid that exhibits both high seed production efficiency and excellent agronomic performance, eliminating the drawbacks of using CMS lines alone.
4Ease of operation
If three-line CMS systems are used (sterile line, maintainer line, restorer line), then detasseling is eliminated, but breeding and line management complexity increases
Solution Approach 1:
The patent merges the maintainer and restorer functions into a single hybrid production step. By crossing the male-sterile inbred line directly with a fertile inbred line that carries the restorer gene, the system eliminates the need for separate maintainer and restorer line management, reducing operational complexity while maintaining the benefits of no-detasseling hybrid seed production.
Data Source
AI summary
Basically, this invention provides for an inbred corn line designated G07-NPAX5290, methods for producing a corn plant by crossing plants of the inbred line G07-NPAX5290 with plants of another corn plants. The invention relates to the various parts of inbred G07-NPAX5290 including culturable cells. This invention also relates to methods for introducing transgenic transgenes into inbred corn line G07-NPAX5290 and plants produced by said methods.