Corn Variety CV810674 Homogeneous Inbred Lines
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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 CV810674, which includes a cytoplasmic or nuclear factor for male sterility and genetic modifications such as single locus conversions for traits like herbicide tolerance and disease resistance, along with tissue cultures capable of regenerating plants with specific morphological and physiological characteristics, facilitates the production of uniform and high-performing corn plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
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 developing homozygous inbred plants through multiple generations of self-pollination before crossing. This preliminary homozygosity ensures that when crosses are made, the resulting hybrids have predictable and uniform performance. The extensive pre-breeding work creates stable parental lines that reliably produce consistent hybrid offspring, resolving the contradiction between reliability and process complexity.
Solution Approach 2:
The patent employs homogeneity by creating homozygous inbred lines where all plants are genetically identical within each line. This genetic uniformity within parental lines ensures that crosses between them produce hybrids with consistent, predictable traits. The homogeneity of the inbred parents directly translates to reliability of hybrid performance, addressing the technical contradiction.
2Manufacturing precision
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity is improved, but the time required for breeding is increased
Solution Approach 1:
The patent applies preliminary action by performing multiple generations of self-pollination in advance to achieve complete homozygosity before the actual hybridization step. This upfront investment of time creates genetically uniform parental lines that will produce predictable hybrids, resolving the contradiction between achieving genetic uniformity and the time investment required.
Solution Approach 2:
The patent uses temporary, disposable inbred lines that are developed through self-pollination specifically for hybrid production. These inbred lines serve their purpose of providing uniform genetic material for crossing and then are replaced by new inbred developments. The temporary nature of these breeding lines allows intensive focus on achieving homozygosity without long-term maintenance constraints.
3Productivity
If cross-pollination is used to produce hybrid plants, then yield and performance are improved, but genetic uniformity among hybrids is reduced
Solution Approach 1:
The patent applies homogeneity by ensuring both parental inbred lines are completely homozygous and genetically uniform before crossing. When two uniform parental lines are crossed, all F1 hybrids receive identical genetic combinations, resulting in uniform hybrid offspring. This maintains both high yield from hybrid vigor and genetic uniformity across the hybrid population.
Solution Approach 2:
The patent uses preliminary action by thoroughly developing and stabilizing both parental inbred lines through multiple generations of self-pollination and selection before making the cross. This preliminary work ensures that when cross-pollination occurs, the resulting hybrids are genetically uniform. The advance preparation of parental lines resolves the contradiction between achieving hybrid productivity and maintaining uniformity.
4Reliability
If extensive selection processes are used to develop superior inbred plants, then desirable traits are improved, but the complexity and cost of breeding programs are increased
Solution Approach 1:
The patent applies self-service by using self-pollination to automatically maintain and purify inbred lines over generations. The self-pollinating mechanism naturally selects for homozygosity and maintains genetic uniformity without requiring intensive manual intervention. This self-service approach to line maintenance reduces breeding program complexity while still achieving reliable desirable traits through systematic selection during the homozygization process.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV810674. The invention thus relates to the plants, seeds and tissue cultures of the variety CV810674, and to methods for producing a corn plant produced by crossing a corn plant of variety CV810674 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 CV810674 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 CV810674.