Corn Variety CV932089 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 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 CV932089, which includes methods for producing inbred corn plants with specific traits like male sterility, herbicide tolerance, and disease resistance, using techniques such as backcrossing and genetic transformation to introduce desired genetic loci, ensuring uniformity and stability through cytoplasmic or nuclear factors.
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 exhibit genetic non-uniformity leading to unpredictable performance
Solution Approach 1:
The breeding process is segmented into distinct phases: developing homozygous inbred parental lines through self-pollination, then crossing these standardized inbreds to produce uniform F1 hybrids. This segmentation ensures genetic uniformity within each phase while allowing trait combination across phases.
Solution Approach 2:
The patent changes the genetic uniformity parameter by enforcing homozygosity in parental inbred lines through multiple generations of self-pollination and selection. This parameter change ensures that all plants within an inbred line are genetically identical, which then translates to uniform F1 hybrid performance.
2Manufacturing precision
If self-pollination is used to develop homozygous inbred plants, then uniform true-breeding progeny are produced, but the breeding process requires multiple generations and extensive selection time
Solution Approach 1:
Homozygous inbred parental lines are developed and standardized in advance before hybrid production. This preliminary development of genetically uniform inbreds ensures that when crossing occurs, the F1 hybrids inherit consistent genetic composition, reducing the need for subsequent selection generations.
Solution Approach 2:
Once homozygous inbred lines are established, they can be continuously used as parental lines for hybrid production without requiring further generations of selfing. The useful genetic material is maintained and reused, eliminating the time loss associated with repeated breeding cycles.
3Adaptability or versatility
If cross-pollination is used to produce hybrid plants, then genetic diversity is introduced, but the resulting population lacks uniformity and shows unpredictable performance
Solution Approach 1:
The patent applies different genetic strategies to different parts of the breeding system: homozygous inbred parental lines are maintained with complete genetic uniformity, while the F1 hybrid generation introduces controlled genetic diversity through crossing. Each generation has its own quality characteristic optimized for its purpose.
Solution Approach 2:
The breeding system uses asymmetric parental lines with specific genetic compositions that are not mirrors of each other. This asymmetric crossing between distinct homozygous inbreds produces F1 hybrids with heterozygous advantage while maintaining uniformity, as both parents contribute fixed genetic contributions.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV932089. The invention thus relates to the plants, seeds and tissue cultures of the variety CV932089, and to methods for producing a corn plant produced by crossing a corn plant of variety CV932089 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 CV932089 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 CV932089.