Inbred Corn Line SLB28 Yield and Stalk Strength
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Solution Overview
Problem
Current corn breeding methods are slow and costly, and existing inbred corn lines lose commercial competitiveness over time, necessitating the development of improved germplasm with enhanced yield, disease resistance, and adaptability.
Innovation Solution
The introduction of the inbred corn line SLB28, which offers improved grain yield and stalk strength, along with methods for producing hybrid corn plants using SLB28 as a parent, including seed treatment options for resistance to stress conditions and diseases, and techniques for controlling male fertility to prevent self-pollination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional inbreeding methods are used to develop new inbred corn lines, then genetic uniformity and purity are improved, but the process becomes slow and costly, and existing inbred lines lose commercial competitiveness over time
Solution Approach 1:
The patent applies preliminary action by developing and preserving inbred corn line SLB28 with pre-established desirable traits (yield, disease resistance, adaptability) that can be immediately utilized in hybrid production. The line has been through multiple generations of inbreeding and selection to achieve genetic uniformity before being deployed, eliminating the need for time-consuming breeding processes when commercial hybrid seed is produced.
Solution Approach 2:
The patent employs parameter changes by modifying key genetic parameters through selective breeding to achieve superior performance in specific traits. Inbred line SLB28 was developed with optimized parameters for grain yield, disease resistance, and adaptability to various production areas, allowing it to maintain commercial competitiveness without requiring continuous lengthy breeding cycles.
2Stability of the object's composition
If self-pollination is allowed in inbred corn lines, then genetic purity is maintained, but commercial competitiveness decreases due to inbreeding depression and loss of vigor
Solution Approach 1:
The patent applies segmentation by separating the functions of inbred line maintenance and hybrid seed production. Inbred line SLB28 is maintained through controlled self-pollination to preserve genetic purity, while hybrid seed production is achieved by crossing SLB28 with other inbred lines in controlled environments. This segmentation allows genetic purity to be maintained without the negative effects of continuous self-pollination on commercial hybrid performance.
Solution Approach 2:
The patent uses an intermediary approach by employing male sterile lines or controlled pollination systems as intermediaries between the inbred line maintenance system and hybrid seed production system. This allows genetic purity of SLB28 to be preserved while enabling vigorous hybrid production through controlled crosses, avoiding inbreeding depression.
3Ease of manufacture
If existing inbred corn lines are used repeatedly, then breeding costs are reduced, but they lose commercial competitiveness over time due to genetic stagnation
Solution Approach 1:
The patent applies preliminary action by developing inbred line SLB28 with comprehensive pre-adaptation to various environmental conditions and disease pressures through multi-location testing and selection. This preliminary hardening and trait optimization ensures the line maintains commercial competitiveness across different production areas without requiring continuous expensive breeding updates, reducing long-term breeding costs while preserving adaptability.
4Productivity
If male fertility is not controlled in hybrid seed production, then pollination efficiency is improved, but self-pollination occurs reducing hybrid seed purity
Solution Approach 1:
The patent applies the extraction principle by removing or inactivating the male fertility function in specific parental lines used as female parents in hybrid seed production. Male sterile lines or detasseled plants have their pollen production eliminated, preventing self-pollination and ensuring that only cross-pollinated seeds are produced. This extraction of male function maintains hybrid seed purity while allowing efficient pollination by the male parent.
Data Source
AI summary
An inbred corn line, designated SLB28, the plants and seeds of the inbred corn line SLB28, methods for producing a corn plant, either inbred or hybrid, produced by crossing the inbred corn line SLB28 with itself or with another corn plant, and hybrid corn seeds and plants produced by crossing the inbred line SLB28 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 SLB28, to methods for producing other inbred corn lines derived from inbred corn line SLB28 and to the inbred corn lines derived by the use of those methods.