Corn Variety CV045770 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 uniformity, as they often result in unpredictable performance due to genetic non-uniformity among hybrid plants.
Innovation Solution
The development of the corn variety CV045770, 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 homogeneous population of inbred seeds and plants with specific genetic loci.
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 hybrid plants show genetic non-uniformity leading to unpredictable performance
Solution Approach 1:
The patent applies homogeneity by developing highly inbred parental lines that are genetically uniform and homozygous. This ensures that all plants in the parental populations are essentially identical genetically, which when crossed produce uniform F1 hybrids with predictable performance. The breeding program maintains homogeneous populations through repeated self-pollination and selection over multiple generations.
Solution Approach 2:
The patent segments the breeding process into distinct phases: developing separate inbred parental lines with specific traits, then crossing them to produce uniform hybrids. This segmentation allows independent optimization of each parental line for specific desirable traits while ensuring uniformity within each line, resolving the contradiction between trait diversity and performance predictability.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then uniform populations of true breeding progeny are produced, but the breeding process requires extensive generations of selection and crossing
Solution Approach 1:
The patent applies preliminary action by pre-developing highly inbred, genetically uniform parental lines through extensive self-pollination and selection before the hybridization step. This preliminary inbreeding process, while time-consuming, is performed once to create stable parental stocks that can then be crossed to produce uniform hybrids without requiring additional generations of inbreeding for each hybrid production cycle.
Solution Approach 2:
The patent uses copying by maintaining and propagating the developed inbred parental lines as stable, reusable genetic stocks. Once the inbred lines are developed with desired traits, they can be copied and used repeatedly as parents to produce uniform hybrids, avoiding the need to repeat the lengthy inbreeding process for each new hybrid production.
3Adaptability or versatility
If cross-pollination is used to produce hybrid plants, then genetic diversity is introduced, but the resulting population is non-uniform and performance becomes unpredictable
Solution Approach 1:
The patent applies homogeneity by ensuring that both parental lines used in cross-pollination are highly inbred and genetically uniform. This means that all pollen grains from one parent are genetically identical, and all ovules from the other parent are genetically identical. The cross-pollination between these homogeneous parents produces F1 hybrids that are all genetically identical to each other, maintaining population uniformity while still introducing the desired genetic diversity from two different inbred lines.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV045770. The invention thus relates to the plants, seeds and tissue cultures of the variety CV045770, and to methods for producing a corn plant produced by crossing a corn plant of variety CV045770 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 CV045770 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 CV045770.