Corn Variety CV754236 Breeding for Genetic Uniformity
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like higher yield, disease resistance, and uniformity, but existing methods face challenges in developing stable inbred plants with predictable performance due to genetic non-uniformity and the need for extensive selection processes.
Innovation Solution
The development of the corn variety CV754236, which includes a cytoplasmic or nuclear factor for male sterility and additional heritable traits such as herbicide tolerance and disease resistance, along with a process for producing inbred and hybrid seeds using specific crossing techniques to ensure genetic uniformity and desirable characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional breeding methods are used to develop inbred plants, then genetic diversity is maintained, but genetic uniformity and predictability of performance are reduced
Solution Approach 1:
The patent applies preliminary action by pre-establishing homozygous inbred parental lines through multiple generations of self-pollination and selection before the actual hybrid breeding process. This preliminary development of genetically uniform parents ensures that the F1 hybrid generation will exhibit consistent and predictable performance, resolving the contradiction between achieving genetic uniformity and managing breeding process complexity.
Solution Approach 2:
The patent employs homogeneity by creating homozygous inbred lines where all individuals within a line are genetically identical. This genetic homogeneity in the parental lines directly translates to uniformity in the F1 hybrid progeny, ensuring predictable performance across the entire population while maintaining a systematic breeding approach.
2Stability of the object's composition
If self-pollination is used to develop inbred lines, then genetic uniformity is achieved, but the time required for breeding is increased
Solution Approach 1:
The patent uses preliminary action by completing the multi-generation self-pollination process in advance to establish ready-to-use homozygous inbred parental lines. Once these lines are developed, the actual hybrid production can proceed efficiently without repeating the time-consuming selfing process, thus achieving genetic uniformity while managing breeding timeline.
Solution Approach 2:
The patent applies self-service through self-pollination of the parental lines to maintain and propagate the homozygous inbred lines. This self-service mechanism ensures genetic uniformity is preserved in the parental lines without requiring external intervention, allowing the breeding program to maintain genetically uniform parents efficiently over time.
3Adaptability or versatility
If cross-pollination is used to produce hybrid seeds, then genetic diversity and trait combination are improved, but genetic uniformity of the progeny is reduced
Solution Approach 1:
The patent resolves this contradiction by ensuring both parental lines are homozygous and genetically uniform before cross-pollination. When two homogeneous parental lines are crossed, all F1 progeny receive identical genetic combinations, resulting in uniform hybrids that exhibit the desired trait combinations. This approach maintains genetic uniformity in the progeny while achieving superior trait combination through the cross.
Solution Approach 2:
The patent applies preliminary action by preparing and validating the homozygosity of both parental lines before performing the cross-pollination. This preliminary preparation ensures that when cross-pollination occurs, the resulting F1 hybrids will be genetically uniform with consistent trait expression, resolving the contradiction between trait combination diversity and progeny uniformity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV754236. The invention thus relates to the plants, seeds and tissue cultures of the variety CV754236, and to methods for producing a corn plant produced by crossing a corn plant of variety CV754236 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 CV754236 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 CV754236.