Corn Variety I211986 Breeding Segmentation
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing uniform corn hybrids with desirable traits such as high yield, disease resistance, and uniform germination, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety I211986, which includes methods for producing inbred corn plants with specific traits like male sterility, herbicide tolerance, and disease resistance, using techniques such as backcrossing and genetic transformation to introduce desired loci, and the use of cytoplasmic-male sterility to control pollination and ensure uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different plants, then genetic diversity and potential for improved traits increase, but genetic uniformity and predictability of performance decrease
Solution Approach 1:
The breeding process is segmented into distinct phases: creating inbred lines through repeated self-pollination to achieve uniformity, then using those uniform inbreds as parents for controlled cross-pollination. This segmentation allows each phase to optimize for its specific goal - uniformity in inbreds, diversity in hybrids.
Solution Approach 2:
Inbred lines are developed through preliminary self-pollination and selection before the actual hybrid cross-pollination. This preliminary action ensures that the parent lines are genetically uniform and stable, which then enables predictable performance in the resulting hybrids despite the diversity introduced during cross-pollination.
2Reliability
If self-pollination is used to develop uniform inbred plants, then genetic uniformity and true-breeding progeny increase, but genetic variation and combination of desirable traits decrease
Solution Approach 1:
The process begins with preliminary self-pollination of selected plants over multiple generations to develop uniform inbred lines. This preliminary action creates the genetic uniformity needed for reliable true-breeding, while the selection process during this phase begins to combine desirable traits.
Solution Approach 2:
Self-pollination is applied continuously over multiple generations (S1, S2, S3, etc.) to progressively increase genetic uniformity. Each generation of self-pollination refines the uniformity while selection continues to accumulate desirable traits, creating a continuous process that achieves both uniformity and trait combination.
3Reliability
If multiple generations of selfing and selection are performed to develop inbred plants, then genetic uniformity and true-breeding increase, but time required for breeding program increases
Solution Approach 1:
The most critical self-pollination and selection work is performed as preliminary action during the development of inbred lines. Once these inbreds are established, they can be used repeatedly for hybrid production without requiring continued selfing, thus concentrating the time investment during the necessary preliminary phase.
Solution Approach 2:
Once uniform inbred lines are developed, they serve as genetic copies that can be repeatedly used as parents for hybrid production. This copying allows the breeding program to skip repeated self-pollination cycles and directly produce hybrids from the established inbred parents, reducing overall program time.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated I211986. The invention thus relates to the plants, seeds and tissue cultures of the variety I211986, and to methods for producing a corn plant produced by crossing a corn plant of variety I211986 with itself or with another corn plant, such as a plant of another variety. The invention further relates to corn seeds and plants produced by crossing plants of variety I211986 with plants of another variety, such as another inbred line. The invention further relates to the inbred and hybrid genetic complements of plants of variety I211986.