Hybrid Corn CH482178 Breeding for Uniformity
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing uniform hybrid plants with desirable traits such as high yield, disease resistance, and uniformity, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the hybrid corn variety CH482178, which incorporates a cytoplasmic or nuclear factor for male sterility and introduces specific genetic loci conferring traits like herbicide resistance, disease resistance, and altered metabolism, using backcrossing and genetic transformation techniques to ensure stability and desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop hybrid corn varieties, then genetic diversity is achieved, but uniformity and predictability of performance deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: developing homozygous inbred parent lines through multiple generations of self-pollination, then crossing these standardized parents to produce uniform F1 hybrid progeny. This segmentation ensures genetic uniformity in the hybrid generation while maintaining diversity across different hybrid varieties.
Solution Approach 2:
The patent changes the genetic parameter state by transitioning from heterozygous diverse populations to homozygous uniform inbred lines, then to heterozygous uniform F1 hybrids. This parameter transformation (from diverse to uniform) resolves the contradiction between genetic diversity and uniformity.
2Reliability
If multiple desirable traits are combined in a single hybrid variety, then overall performance and reliability improve, but the complexity of breeding programs increases
Solution Approach 1:
Multiple desirable traits (disease resistance, yield, stress tolerance) are merged into single hybrid varieties by selecting inbred parents that contribute complementary traits. The crossing process combines these traits in the F1 generation, achieving reliable multi-trad performance while managing breeding complexity through systematic parent selection.
Solution Approach 2:
The breeding program develops inbred parent lines that serve multiple functions: they are used for producing specific hybrid varieties, for maintaining trait combinations across different hybrids, and for selecting parents with complementary trait profiles. This multi-functionality reduces overall program complexity.
3Manufacturing precision
If homozygous inbred plants are developed through extensive self-pollination, then uniformity of parent lines improves, but the time required for breeding increases
Solution Approach 1:
Inbred parent lines are developed in advance through multiple generations of self-pollination before the hybrid crossing phase. This preliminary action creates standardized, uniform parents that can then be crossed to produce uniform hybrids, reducing the time needed for later selection and evaluation.
Solution Approach 2:
Once uniform inbred lines are established, they serve as reusable parental stocks that can be crossed repeatedly to produce identical F1 hybrid progeny. This copying approach eliminates the need to re-develop the same uniform genetic combinations, significantly reducing breeding time for subsequent varieties.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH482178. The invention thus relates to the plants, seeds and tissue cultures of the variety CH482178, and to methods for producing a corn plant produced by crossing a corn plant of variety CH482178 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 CH482178.