Corn Variety CV536449 Breeding for Uniform Hybrid Performance
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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 uniformity, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV536449, which includes methods for producing inbred corn plants with specific traits like male sterility, herbicide tolerance, and disease resistance through cytoplasmic-male sterility systems and genetic transformation, ensuring uniformity and stability across generations.
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 uniformity and predictability of hybrid performance decrease
Solution Approach 1:
The patent segments the breeding process into distinct phases: creating homozygous inbred lines through repeated self-pollination, then crossing these inbreds to produce uniform F1 hybrids. This segmentation allows each phase to optimize for its specific goal - diversity in the inbred development phase, then uniformity in the hybrid production phase.
Solution Approach 2:
The patent applies preliminary action by first developing homozygous inbred plants through multiple generations of self-pollination and selection before creating the final hybrid crosses. This preliminary development ensures that the parental lines are genetically stable and uniform, which then guarantees uniform F1 hybrid performance.
2Reliability
If self-pollination is used to develop homozygous inbred plants, then uniformity and genetic stability increase, but the ability to combine diverse desirable traits decreases
Solution Approach 1:
The patent uses preliminary action by first creating homozygous inbred lines through extended self-pollination, which establishes genetically stable and uniform parental lines. These stabilized inbreds are then crossed to combine desirable traits from different genetic backgrounds, achieving both stability in the inbreds and diversity in the final hybrid.
Solution Approach 2:
The patent employs copying by repeatedly self-pollinating plants over multiple generations to create homozygous inbred lines that are genetic copies of the original parental traits. This copying process ensures that desirable traits are fixed and uniformly transmitted through the inbred lines before final hybridization.
3Manufacturing precision
If multiple generations of breeding are performed to achieve uniformity, then homozygosity and phenotypic uniformity increase, but time required for breed development increases
Solution Approach 1:
The patent applies preliminary action by concentrating the self-pollination and selection process into an initial phase to develop homozygous inbred lines. Once these inbreds are established, subsequent crosses produce uniform F1 hybrids more quickly, as the parental lines are already genetically stabilized.
Solution Approach 2:
The patent uses dynamics by adjusting the breeding strategy based on generation - using self-pollination and selection in early generations to establish homozygosity, then switching to cross-pollination in later generations to produce uniform hybrids. This dynamic approach optimizes the time required for each breeding phase.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV536449. The invention thus relates to the plants, seeds and tissue cultures of the variety CV536449, and to methods for producing a corn plant produced by crossing a corn plant of variety CV536449 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 CV536449 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 CV536449.