Inbred Corn Line 7HHLL2007 Breeding Portfolio
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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 need for improved germplasm with enhanced yield production and resistance to insects, weeds, and diseases.
Innovation Solution
The introduction of the inbred corn line 7HHLL2007, which is a yellow dent inbred corn line with specific physiological and morphological characteristics, along with methods for producing and treating seeds to increase resistance to stressed conditions, and the use of breeding techniques such as pedigree breeding, backcrossing, haploid breeding, and mutation breeding to develop new inbred and hybrid corn plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional inbreeding techniques are used to develop new inbred corn lines, then existing inbred parent corn lines can be improved, but the process is slow and costly and existing lines lose commercial competitiveness over time
Solution Approach 1:
The patent applies preliminary action by pre-developing and maintaining a diverse collection of inbred corn lines with different maturity groups and traits before market demand shifts. This allows Breeders to quickly select and deploy appropriate lines when commercial opportunities arise, rather than developing lines from scratch each time. The patent also employs molecular marker-assisted selection in advance to accelerate the inbreeding process and predict line performance before field testing.
Solution Approach 2:
The patent utilizes parameter changes by developing inbred lines across multiple maturity groups (e.g., 70, 80, 90, 100 day maturity) and combining them in hybrid crosses. This creates a portfolio of lines with varying physiological parameters that can be matched to different environmental conditions and market requirements, thereby maintaining commercial competitiveness across changing market conditions without requiring complete re-development of lines.
2Stability of the object's composition
If extensive inbreeding is performed to develop new inbred lines, then genetic uniformity is achieved, but line vigor decreases and additional inbreeding merely increases seed production
Solution Approach 1:
The patent merges the genetic uniformity advantage of inbred lines with the vigor advantage of hybridization by developing inbred lines specifically for use as parents in hybrid corn production. The inbred lines themselves maintain genetic uniformity for stability, but their combining ability in hybrid crosses restores vigor through heterosis. The patent also combines multiple desirable traits from different inbred lines into single hybrid varieties, achieving both uniformity and vigor.
Solution Approach 2:
The patent applies dynamics by maintaining a living, evolving collection of inbred lines that are periodically refreshed and recombined. Rather than allowing lines to become static and lose vigor through continuous selfing, the system dynamically introduces new genetic variation through controlled crosses and selects for lines that maintain both uniformity and vigor. This dynamic approach prevents the diminishing returns associated with excessive inbreeding.
3Ease of manufacture
If existing inbred parent corn lines are used repeatedly, then breeding expertise is leveraged, but commercial competitiveness is lost over time
Solution Approach 1:
The patent segments the corn breeding program into distinct maturity groups and trait categories, allowing Breeders to specialize in developing and maintaining specific line types. This segmentation enables efficient management of large numbers of inbred lines by organizing them into manageable segments that can be independently improved and recombined. It also allows the breeding program to maintain competitiveness across multiple market segments simultaneously rather than relying on a single general-purpose line.
Solution Approach 2:
The patent develops inbred lines with universal applicability that can serve multiple functions across different hybrid combinations and environmental conditions. Rather than developing specialized lines for single uses, the breeding program creates lines with broad adaptability that can be paired with multiple different partners to produce competitive hybrids. This multi-functionality extends the useful life of inbred lines and maintains their commercial competitiveness over time.
Data Source
AI summary
An inbred corn line, designated 7HHLL2007, the plants and seeds of the inbred corn line 7HHLL2007, methods for producing a corn plant, either inbred or hybrid, produced by crossing the inbred corn line 7HHLL2007 with itself or with another corn plant, and hybrid corn seeds and plants produced by crossing the inbred line 7HHLL2007 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 7HHLL2007, to methods for producing other inbred corn lines derived from inbred corn line 7HHLL2007 and to the inbred corn lines derived by the use of those methods.