Corn Variety CV993411 for Uniform Hybrid Trait Stability
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Solution Overview
Problem
Existing corn breeding methods struggle to develop uniform hybrids with desirable traits such as increased yield, disease resistance, and drought tolerance, often resulting in unpredictable performance due to genetic non-uniformity.
Innovation Solution
The development of the corn variety CV993411, which is homozygous and self-incompatible, combined with genetic modifications for traits like herbicide tolerance and insect resistance, and the use of tissue culture for regenerable cells to maintain uniformity and desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to create hybrid corn plants, then genetic diversity and trait combination are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first creating homozygous inbred lines through self-pollination (achieving genetic uniformity), then crossing these stabilized lines to produce hybrids (introducing genetic diversity). This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
Homozygous inbred parent lines are developed and stabilized through multiple generations of self-pollination before the hybrid cross is performed. This preliminary action ensures that the parental lines have uniform and predictable genetics, which then enables the hybrid to exhibit consistent heterosis traits.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity is improved, but genetic diversity and trait combination deteriorate
Solution Approach 1:
Self-pollination is used as a preliminary action to stabilize the genetic composition of parent lines before they are crossed. This creates homozygous inbreds with uniform genetics, which then serve as the foundation for generating diverse hybrids through subsequent cross-pollination.
Solution Approach 2:
Homozygous inbred lines serve as an intermediary stage between the breeder's goal of genetic uniformity and the final hybrid's genetic diversity. These inbreds are the uniform building blocks that, when crossed, produce the diverse yet predictable hybrids.
3Stability of the object's composition
If multiple breeding generations are performed to achieve homozygosity, then genetic stability is improved, but breeding time and productivity deteriorate
Solution Approach 1:
Self-pollination is utilized to automatically achieve homozygosity without requiring complex external intervention. The plant's own pollen fertilizes its own ovules, naturally progressing toward homozygous lines through successive generations, which simplifies the breeding process despite the time required.
Solution Approach 2:
The breeding program changes the generational parameter by performing multiple successive self-pollination cycles (F2, F3, F4, etc.) to progressively increase homozygosity. Each generation brings the population closer to complete homozygosity, with the understanding that this parameter change requires accepting increased time investment.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the corn variety designated CV993411. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CV993411, and to methods for producing a corn plant produced by crossing a corn plant of variety CV993411 with itself or with another corn plant, such as a plant of another variety. The disclosure further relates to corn seeds and plants produced by crossing plants of variety CV993411 with plants of another variety, such as another inbred line. The disclosure further relates to the inbred and hybrid genetic complements of plants of variety CV993411.