Inbred Corn Line SBK22 Breeding for Yield and Disease Resistance
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing new inbred corn lines that maintain commercial competitiveness due to decreased vigor over time, requiring continuous efforts to improve yield and resistance to pests and diseases, while also ensuring seed purity and hybrid vigor.
Innovation Solution
The development of the inbred corn line SBK22, which offers increased grain yield and enhanced resistance to insects, weeds, and diseases, along with methods for producing hybrid seeds using SBK22 as a parent, including techniques for controlling male sterility and incorporating transgenes for improved traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If inbreeding is practiced over multiple generations to develop new inbred corn lines, then genetic uniformity and purity are improved, but plant vigor and yield performance deteriorate
Solution Approach 1:
The patent employs dynamic breeding strategies where inbred lines are continuously updated and recombined with new genetic sources to restore vigor while maintaining uniformity. This allows the breeding program to adapt over time, preventing the permanent decline associated with static inbreeding.
Solution Approach 2:
The patent changes key breeding parameters by introducing new genetic material from diverse sources and adjusting selection criteria to balance uniformity with vigor restoration. This parameter adjustment prevents the monotonic decline in productivity that occurs with continuous inbreeding.
2Stability of the object's composition
If continuous inbreeding is performed to maintain seed purity, then genetic stability is improved, but resistance to pests and diseases deteriorates
Solution Approach 1:
The patent incorporates disease and pest resistance traits into inbred lines before they are fully stabilized, ensuring that resistance is established early in the breeding process. This preliminary incorporation prevents later vulnerabilities while maintaining seed purity through controlled breeding.
Solution Approach 2:
The patent creates composite inbred lines that combine multiple genetic sources, each contributing different resistance traits. This composite approach maintains seed purity through controlled crosses while accumulating diverse resistance genes that protect against multiple pests and diseases.
3Ease of manufacture
If traditional breeding methods are used to develop inbred lines, then seed production cost is reduced, but time required to develop competitive new lines increases
Solution Approach 1:
The patent segments the breeding process into parallel tracks, simultaneously developing multiple inbred lines with different traits. This segmentation allows faster identification of successful combinations without increasing individual line development time or cost, accelerating overall program productivity.
Solution Approach 2:
The patent uses intermediary populations and test crosses as mediators to evaluate multiple breeding candidates efficiently. These intermediaries allow rapid assessment of trait combinations without committing to full-scale production of each line, reducing both time and resource investment.
Data Source
AI summary
An inbred corn line, designated SBK22, the plants and seeds of the inbred corn line SBK22, methods for producing a corn plant, either inbred or hybrid, produced by crossing the inbred corn line SBK22 with itself or with another corn plant, and hybrid corn seeds and plants produced by crossing the inbred line SBK22 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 SBK22, to methods for producing other inbred corn lines derived from inbred corn line SBK22 and to the inbred corn lines derived by the use of those methods.