Corn Variety CV400433 Breeding for Predictable Hybrid Performance
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like yield, disease resistance, and uniformity, but existing methods struggle to produce stable inbred plants with predictable performance due to genetic non-uniformity from cross-pollination, leading to unpredictable hybrid traits.
Innovation Solution
The development of the corn variety CV400433, 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 consistent morphological and physiological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different plants, then genetic diversity and trait combination are improved, but genetic non-uniformity increases leading to unpredictable hybrid performance
Solution Approach 1:
The breeding process is divided into distinct stages: first developing homozygous inbred lines through repeated self-pollination, then crossing these stable lines to produce uniform F1 hybrids. This segmentation allows each stage to optimize for its specific goal - stability in inbreds, uniformity in hybrids.
Solution Approach 2:
Before creating hybrid plants, the patent performs preliminary self-pollination and selection over multiple generations to establish homozygous inbred parent lines. This preliminary action ensures that the parents are genetically stable and uniform, which then produces predictable uniform F1 hybrids when crossed.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity and breeding stability are improved, but loss of genetic diversity occurs
Solution Approach 1:
The process discards the genetic diversity present in the original diverse population during self-pollination to achieve homozygosity, then recovers useful diversity by crossing different homozygous inbred lines. This allows the system to achieve uniformity when needed and diversity when needed through controlled processes.
Solution Approach 2:
The patent performs preliminary self-pollination and selection over multiple generations to establish homozygous inbred parent lines with stable genetics. This preliminary action creates the uniform parents that will then be crossed to produce uniform F1 hybrids, ensuring predictability in the final hybrid performance.
3Stability of the object's composition
If multiple generations of selfing and selection are performed to develop inbred plants, then homozygosity and uniformity are improved, but breeding time and complexity increase
Solution Approach 1:
The patent performs preliminary self-pollination and selection over multiple generations to establish homozygous inbred parent lines. This preliminary action, while time-consuming, creates stable parents that can then be crossed to produce uniform F1 hybrids, ensuring that the majority of the breeding time is invested in creating the stable foundation materials.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV400433. The invention thus relates to the plants, seeds and tissue cultures of the variety CV400433, and to methods for producing a corn plant produced by crossing a corn plant of variety CV400433 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 CV400433 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 CV400433.