Inbred Corn Line 7DBDD0188 Breeding for Genetic Uniformity
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Solution Overview
Problem
The development of new inbred corn lines is a slow and costly process that requires expertise, and existing inbred parent corn lines lose commercial competitiveness over time, necessitating the creation of improved germplasm with enhanced yield, disease resistance, and trait technologies.
Innovation Solution
The introduction of the inbred corn line 7DBDD0188, which is a yellow dent inbred corn line with specific physiological and morphological characteristics, and methods for producing and breeding corn plants using techniques such as self-pollination, sib-pollination, and tissue culture to create uniform and stable inbred and hybrid corn plants, along with the use of genetic markers and mutagenesis to introduce desired traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional inbreeding techniques are used to develop new inbred corn lines, then genetic uniformity and purity are improved, but the development time and cost increase significantly
Solution Approach 1:
The patent applies preliminary action by establishing a structured multi-generation inbreeding program that prepares and maintains breeding populations in advance. The method involves systematic self-pollination and sib-mating over multiple generations (S1, S2, S3, etc.) to progressively increase homozygosity before final selection, allowing breeders to plan and execute each generation with predetermined protocols rather than reacting to outcomes as they occur.
Solution Approach 2:
The breeding process is segmented into distinct generational stages (S1, S2, S3, S4, etc.), with each generation having specific objectives and selection criteria. This segmentation allows for systematic progression from heterozygous parental material through increasingly homozygous generations, enabling breeders to manage complexity by breaking down the overall inbreeding process into manageable, sequential steps with clear milestones.
2Stability of the object's composition
If extensive inbreeding is performed to achieve homozygosity, then genetic purity is improved, but inbreeding depression reduces plant vigor
Solution Approach 1:
The patent applies partial action by performing inbreeding to a specific degree (achieving sufficient homozygosity for genetic purity) without pushing to complete or excessive inbreeding that would cause severe depression. The method allows breeders to stop the inbreeding process at the optimal point where genetic purity objectives are met while plant vigor remains acceptable, rather than continuing until complete homozygosity is achieved regardless of vigor loss.
Solution Approach 2:
The breeding program dynamically adjusts the intensity and duration of inbreeding based on observed plant performance and genetic progress. Breeders can modify the number of generations, selection stringency, and pollination methods (self vs. sib-mating) to balance purity acquisition with vigor maintenance, making the process adaptable rather than rigid.
3Stability of the object's composition
If new inbred lines are developed through traditional methods, then trait stability is improved, but the ability to adapt to changing market demands decreases
Solution Approach 1:
The patent applies universality by creating a flexible inbreeding framework that can be applied to develop inbred lines with various different traits and characteristics. The same systematic approach (self-pollination, sib-mating, multi-generation selection) serves multiple purposes: developing disease resistance, improving yield, enhancing quality attributes, or adapting to different environmental conditions. This universal methodology allows breeders to respond to diverse market demands using a consistent, reliable process.
Solution Approach 2:
The breeding program allows for parameter changes by adjusting selection criteria, target traits, and performance thresholds based on market requirements. Breeders can modify which traits are prioritized (e.g., disease resistance vs. yield vs. quality), change selection intensity, or adjust the number of generations required based on specific market opportunities, while maintaining the core structured approach that ensures trait stability.
Data Source
AI summary
An inbred corn line, designated 7DBDD0188, the plants and seeds of the inbred corn line 7DBDD0188, methods for producing a corn plant, either inbred or hybrid, produced by crossing the inbred corn line 7DBDD0188 with itself or with another corn plant, and hybrid corn seeds and plants produced by crossing the inbred line 7DBDD0188 with another corn line or plant and to methods for producing a corn plant containing in its genetic material one or more transgenes and to the transgenic corn plants produced by that method. This invention also relates to inbred corn lines derived from inbred corn line 7DBDD0188, to methods for producing other inbred corn lines derived from inbred corn line 7DBDD0188 and to the inbred corn lines derived by the use of those methods.