Hybrid Corn CH491983 Breeding Segmentation
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Solution Overview
Problem
Corn breeding techniques face challenges in developing uniform hybrid varieties with desirable traits such as high yield, disease resistance, and uniform germination due to genetic non-uniformity and unpredictability in cross-pollination, requiring the development of stable inbred plants and specific breeding methods.
Innovation Solution
The development of the hybrid corn variety CH491983, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, utilizing cytoplasmic-male sterility and transgenes integrated at a single chromosomal location, along with tissue cultures capable of regenerating plants with specific physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used in corn breeding, then genetic diversity and trait combination are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing uniform inbred lines through self-pollination (achieving genetic uniformity), then crossing these inbreds to create hybrids (introducing genetic diversity). This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Inbred parent lines are developed and stabilized through multiple generations of self-pollination before the hybrid crossing step. This preliminary action ensures that when cross-pollination occurs, the genetic composition is predictable and uniform, resolving the contradiction between diversity and uniformity.
2Stability of the object's composition
If self-pollination is used to develop inbred lines, then genetic uniformity is improved, but genetic diversity deteriorates
Solution Approach 1:
Self-pollination is used as a preliminary action to establish uniform inbred parent lines with fixed genetic compositions. This creates the foundation of genetic uniformity needed before hybridization, while the subsequent cross-pollination step restores genetic diversity in the final hybrid product.
Solution Approach 2:
The breeding program segments the population into distinct inbred lines that are genetically uniform within themselves, then combines these lines through crossing. This segmentation allows self-pollination to achieve uniformity at the line level while cross-pollination achieves diversity at the hybrid level.
3Adaptability or versatility
If traditional breeding methods are used, then trait combination flexibility is improved, but breeding time and complexity increase
Solution Approach 1:
Inbred parent lines are developed once and can be used repeatedly as parents for multiple hybrid combinations. This preliminary development of reusable genetic building blocks reduces breeding time for subsequent trait combinations compared to developing new populations each time.
Solution Approach 2:
The inbred parent lines serve multiple functions: they can be crossed with different partners to create various hybrids, and their genetic traits can be combined in different configurations. This multi-functionality allows flexible trait combination without requiring separate breeding programs for each combination.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH491983. The invention thus relates to the plants, seeds and tissue cultures of the variety CH491983, and to methods for producing a corn plant produced by crossing a corn plant of variety CH491983 with itself or with another corn plant, such as a plant of another variety. The invention further relates to genetic complements of plants of variety CH491983.