Corn Variety CV949222 Breeding for Genetic Uniformity
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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 drought tolerance, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV949222, which includes a cytoplasmic or nuclear factor for male sterility and other desirable traits like herbicide tolerance and disease resistance, achieved through backcrossing and genetic transformation techniques, ensuring a stable and uniform genetic makeup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional corn breeding techniques are used to develop hybrids, then various desirable traits can be combined in a single variety, but the resulting hybrids show unpredictable performance due to genetic non-uniformity
Solution Approach 1:
The patent applies homogeneity by developing highly inbred parental lines (at least 95% homozygous) to ensure genetic uniformity. This is achieved through extended self-pollination and selection over multiple generations, creating genetically homogeneous populations that produce uniform hybrid offspring when crossed, thereby resolving the performance unpredictability issue while maintaining trait combination capabilities
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then uniform true-breeding progeny are produced, but the breeding process requires extensive time and generations of selection
Solution Approach 1:
The patent applies preliminary action by pre-developing and maintaining separate homozygous inbred parental lines before hybrid production. These inbred lines are developed ahead of time through self-pollination and selection, then stored and used as ready-made parental stocks for hybrid crosses, eliminating the need to perform lengthy inbreeding processes during each hybrid breeding cycle
Solution Approach 2:
The patent applies segmentation by dividing the breeding process into distinct phases: developing inbred line A, developing inbred line B, and then crossing them to produce hybrids. This segmentation allows parallel development of multiple inbred lines that can be combined in various crosses, significantly reducing overall breeding time compared to sequential development
3Productivity
If cross-pollination is used to produce hybrid plants, then genetic diversity and hybrid vigor are achieved, but the resulting population is non-uniform and performance is unpredictable
Solution Approach 1:
The patent applies homogeneity by using highly homozygous inbred parental lines (at least 95% homozygous) as parents for cross-pollination. This ensures that all hybrid offspring receive identical genetic contributions from each parent, resulting in genetically uniform F1 hybrid populations that exhibit consistent performance and predictable traits while maintaining hybrid vigor
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV949222. The invention thus relates to the plants, seeds and tissue cultures of the variety CV949222, and to methods for producing a corn plant produced by crossing a corn plant of variety CV949222 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 CV949222 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 CV949222.