Corn Variety CV638143 Breeding for Uniform Trait-Stable Hybrids
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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 in cross-pollinated plants.
Innovation Solution
The development of the corn variety CV638143, which is homozygous and self-incompatible, along with the introduction of specific genetic loci 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 combine desirable traits from different plants, then genetic diversity and trait combination are improved, but uniformity and predictability of performance deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: creating heterozygous hybrids through cross-pollination, then self-pollinating those hybrids to create homozygous inbred lines. This segmentation allows the benefits of genetic diversity (in the F1 hybrid stage) to be separated from the need for uniformity (in the inbred stage), resolving the contradiction between trait combination and uniformity.
Solution Approach 2:
The patent applies preliminary self-pollination and selection to create homozygous inbred lines before final hybridization. This preliminary action establishes uniform, stable genetic backgrounds that can then be combined through controlled cross-pollination, ensuring that the resulting hybrids have both uniformity and desirable traits.
2Stability of the object's composition
If self-pollination is used to create uniform inbred plants, then uniformity and genetic stability are improved, but the ability to combine diverse traits deteriorates
Solution Approach 1:
The patent uses preliminary cross-pollination to create F1 hybrids with diverse traits, then applies self-pollination in subsequent generations to stabilize the genetics. This preliminary cross-pollination step captures the benefit of trait combination before the self-pollination that ensures uniformity takes effect.
Solution Approach 2:
The breeding system dynamically transitions between two states: cross-pollination (heterozygous, diverse) and self-pollination (homozygous, uniform). This dynamic switching allows the system to exploit both trait combination and uniformity at different stages of the breeding process.
3Stability of the object's composition
If multiple generations of selfing and selection are used to develop inbred plants, then uniformity is improved, but time required for breeding deteriorates
Solution Approach 1:
The patent performs preliminary cross-pollination to create F1 hybrids that already possess the desired trait combinations. This preliminary action reduces the number of subsequent selfing generations needed, as the F1 hybrids are already heterozygous for the desired traits, accelerating the overall breeding process while maintaining uniformity.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the corn variety designated CV638143. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CV638143, and to methods for producing a corn plant produced by crossing a corn plant of variety CV638143 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 CV638143 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 CV638143.