CV873257 Corn Variety: Inbred Lines for Uniform Hybrid Traits
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Solution Overview
Problem
Existing corn breeding techniques struggle to develop uniform hybrids with desirable traits such as increased yield, disease resistance, and improved agronomic qualities, often resulting in unpredictable performance due to genetic non-uniformity.
Innovation Solution
The development of the corn variety CV873257, which includes specific genetic modifications and cytoplasmic traits like male sterility, along with methods for controlled pollination and hybrid production, ensures uniformity and desired traits like herbicide tolerance and insect resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional breeding techniques are used to develop corn hybrids, then various desirable traits can be combined, but genetic non-uniformity results in unpredictable performance
Solution Approach 1:
The patent employs homogeneous inbred parental lines with fixed genetic compositions to ensure uniformity in the hybrid progeny. By using highly homozygous inbreds (greater than 95% homozygosity) as parents, the resulting F1 hybrids exhibit consistent and predictable performance across environments, resolving the contradiction between trait versatility and performance reliability.
2Manufacturing precision
If inbred plants are developed through selfing and selection, then uniform hybrid populations can be produced, but the breeding process becomes time-consuming and complex
Solution Approach 1:
The patent utilizes pre-developed inbred lines that have already undergone multiple generations of selfing and selection to achieve high homozygosity. By starting with these pre-homogenized parental lines, the breeding process is simplified and accelerated, as the uniformity is established beforehand rather than requiring extensive on-site breeding operations.
3Productivity
If cross-pollination is used to produce hybrid corn, then genetic diversity and vigor are improved, but control over pollination and seed purity becomes difficult
Solution Approach 1:
The patent employs physical isolation barriers (such as distance isolation, time isolation, or mechanical barriers) as intermediaries to control pollination between inbred parental lines. These barriers prevent unwanted cross-pollination while allowing the desired cross between specific parental lines, thereby maintaining seed purity and preventing contamination from stray pollen.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV873257. The invention thus relates to the plants, seeds and tissue cultures of the variety CV873257, and to methods for producing a corn plant produced by crossing a corn plant of variety CV873257 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 CV873257 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 CV873257.