Corn Variety CV932863 Breeding for Uniform Hybrid Populations
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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 uniform germination, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV932863, which includes a cytoplasmic or nuclear factor for male sterility and other desirable traits like herbicide tolerance and disease resistance, is achieved through backcrossing and genetic transformation techniques, ensuring a homogeneous population of inbred seeds and plants with specific genetic loci.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional cross-pollination breeding methods are used to develop corn hybrids, then genetic diversity is improved, but uniformity of the hybrid population deteriorates
Solution Approach 1:
The patent applies preliminary action by developing homozygous inbred parental lines through multiple generations of self-pollination before performing the cross. This ensures that both parents are genetically uniform and homozygous, so their F1 hybrid progeny will be uniform and heterozygous. The preliminary development of pure inbred lines resolves the contradiction by establishing genetic uniformity in parents that leads to uniformity in offspring while still achieving genetic diversity through the cross between different inbred lines.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred lines, then uniformity of the inbred population is improved, but genetic diversity is reduced
Solution Approach 1:
The patent applies segmentation by dividing the breeding process into distinct stages: first developing separate homozygous inbred lines through self-pollination, then crossing these distinct lines to create hybrid progeny. This segmentation allows each inbred line to achieve uniformity through selfing, while the subsequent cross between different segmented lines restores genetic diversity in the hybrid generation.
3Ease of operation
If physical emasculation is performed to prevent self-pollination, then control of pollination is improved, but labor intensity and complexity increase
Solution Approach 1:
The patent applies self-service by utilizing the natural self-pollination mechanism of corn to develop homozygous inbred lines. Instead of requiring external intervention (physical emasculation) to control pollination, the system allows corn plants to self-pollinate naturally over multiple generations to achieve homozygosity. This eliminates the need for labor-intensive emasculation operations while still achieving the desired genetic uniformity.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV932863. The invention thus relates to the plants, seeds and tissue cultures of the variety CV932863, and to methods for producing a corn plant produced by crossing a corn plant of variety CV932863 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 CV932863 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 CV932863.