Inbred Corn Line G07-NPID2449 CMS Breeding System
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Solution Overview
Problem
The development of inbred corn lines with specific agronomic traits is challenging due to the complexity of genetic systems governing traits like yield, disease resistance, and adaptability to different soil types and environments, making it difficult to produce hybrids that are uniformly adapted across the Corn Belt regions.
Innovation Solution
The introduction of the inbred corn line G07-NPID2449, which combines unique traits and allows for the production of hybrid seeds through targeted trait introduction using methods like marker-assisted breeding and transgenic genes, enabling improved yield, disease resistance, and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop inbred corn lines with specific agronomic traits, then breeding programs can proceed with conventional approaches, but the complexity of genetic systems makes it difficult to produce hybrids uniformly adapted across different regions
Solution Approach 1:
The patent introduces a male sterility system as an intermediary mechanism to simplify hybrid seed production. By using cytoplasmic male sterility (CMS) in the seed parent, the need for manual detasseling is eliminated, and cross-pollination is automatically ensured. This intermediary genetic system resolves the contradiction by providing a reliable method for producing uniformly adapted hybrids without complex manual intervention across different growing regions.
Solution Approach 2:
The patent employs parameter changes by introducing specific genetic traits (male sterility, fertility restoration genes) that alter the reproductive parameters of the corn plants. By changing the sterility parameter through cytoplasmic factors and nuclear restorer genes, the system enables controlled cross-pollination and produces hybrids with consistent adaptability across different environments without requiring complex regional-specific breeding programs.
2Ease of manufacture
If CMS (cytoplasmic male sterility) is introduced into inbred lines to eliminate detasseling, then hybrid seed production becomes simpler, but poor agronomic performance traits are introduced causing farmer concern
Solution Approach 1:
The patent applies the extraction principle by separating the male sterility function from the agronomic performance traits. The CMS trait is introduced only in the seed parent line specifically for the purpose of eliminating detasseling, while the maintainer and restorer lines retain normal agronomic performance. This extraction allows the sterility function to be taken out and applied only where needed, preventing the spread of poor agronomic traits to the final hybrid product.
Solution Approach 2:
The breeding program is segmented into three distinct lines with specific functions: the CMS seed parent line (for eliminating detasseling), the maintainer line (for preserving the CMS trait and maintaining agronomic performance), and the restorer line (for restoring fertility and providing good agronomic traits). This segmentation allows each line to be optimized for its specific function, ensuring that poor agronomic performance remains isolated to the seed parent and does not affect the final hybrid's reliability.
3Ease of operation
If three different maize lines are required for CMS system (male sterile line, maintainer line, restorer line), then detasseling is eliminated, but the breeding complexity increases requiring breeding of all three types of lines
Solution Approach 1:
The CMS system enables self-service in hybrid seed production by automatically preventing self-pollination through cytoplasmic male sterility. The seed parent line cannot produce viable pollen, so cross-pollination from the restorer line occurs automatically without requiring manual detasseling or other mechanical interventions. This self-service mechanism eliminates labor-intensive operations while the standardized three-line system provides a repeatable breeding framework that reduces long-term complexity.
Data Source
AI summary
Basically, this invention provides for an inbred corn line designated G07-NPID2449, methods for producing a corn plant by crossing plants of the inbred line G07-NPID2449 with plants of another corn plants. The invention relates to the various parts of inbred G07-NPID2449 including culturable cells. This invention also relates to methods for introducing transgenic transgenes into inbred corn line G07-NPID2449 and plants produced by said methods.