Inbred Corn Line 7HHSS2120 Accelerating Breeding via Mutation
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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 7HHSS2120, which is a yellow dent inbred corn line with specific physiological and morphological characteristics, and methods for producing and utilizing it, including self-pollination, sib-pollination, and hybrid production, along with genetic modification and tissue culture techniques to enhance yield and resistance.
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 homozygosity are achieved, but the process is slow and costly
Solution Approach 1:
The patent employs preliminary action by using mutation breeding to pre-create genetic variation and identify promising mutant plants before formal inbreeding. This preliminary mutagenesis step accelerates the traditional slow process by pre-generating diverse genetic material that can be rapidly advanced through inbreeding, reducing the overall time required to develop new inbred lines while maintaining genetic uniformity in the final product.
2Productivity
If existing inbred parent corn lines are used repeatedly, then commercial production is maintained, but they lose competitiveness over time
Solution Approach 1:
The patent applies parameter changes by systematically varying genetic parameters through mutation breeding, creating new inbred lines with novel genetic compositions. This introduces fresh genetic variation into the breeding program, allowing the development of new inbred parent lines that restore commercial competitiveness by changing the genetic parameters that have become limiting in existing lines.
3Stability of the object's composition
If self-pollination and sib-pollination are used to produce inbred lines, then homozygous plants are obtained, but vigor decreases
Solution Approach 1:
The patent converts the harmful effect of inbreeding depression into a benefit by using mutation breeding to introduce novel genetic variation that compensates for vigor loss. The harmful inbreeding effect is offset by the beneficial introduction of new genes through mutation, allowing the maintenance of homozygosity while restoring plant vigor through novel genetic combinations that were not available in the original population.
Data Source
AI summary
An inbred corn line, designated 7HHSS2120, the plants and seeds of the inbred corn line 7HHSS2120, methods for producing a corn plant, either inbred or hybrid, produced by crossing the inbred corn line 7HHSS2120 with itself or with another corn plant, and hybrid corn seeds and plants produced by crossing the inbred line 7HHSS2120 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 7HHSS2120, to methods for producing other inbred corn lines derived from inbred corn line 7HHSS2120 and to the inbred corn lines derived by the use of those methods.