Corn Variety CV181138 Breeding for Genetic Uniformity
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like higher yield, disease resistance, and uniformity, but existing methods struggle to develop stable inbred plants with predictable performance due to genetic non-uniformity in hybrid plants.
Innovation Solution
The development of the corn variety CV181138, which includes a cytoplasmic or nuclear factor for male sterility and additional heritable traits such as herbicide tolerance and disease resistance, along with a process for producing hybrid seeds by crossing inbred plants to ensure genetic stability and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to create hybrid plants, then genetic diversity and trait combination are improved, but genetic uniformity and performance predictability deteriorate
Solution Approach 1:
The breeding program segments the breeding population into distinct inbred lines through repeated self-pollination, creating genetically uniform parental lines that can be systematically crossed to produce predictable hybrids with desired trait combinations
Solution Approach 2:
The patent applies preliminary action by developing homozygous inbred plants through multiple generations of self-pollination before crossing. This preliminary homozygization ensures that subsequent hybrid crosses produce uniform, predictable results with consistent expression of desired traits
2Stability of the object's composition
If self-pollination is used to develop inbred plants, then genetic uniformity is improved, but trait combination and adaptability worsen
Solution Approach 1:
The patent uses cross-pollination as an intermediary step between inbred line development and hybrid production. The inbred lines serve as uniform parental stocks, and their controlled crossing introduces genetic diversity while maintaining predictability through known parental genotypes
3Adaptability or versatility
If breeding populations are expanded to combine multiple traits, then trait diversity is improved, but selection precision and uniformity worsen
Solution Approach 1:
The breeding program segments the complex task of combining multiple traits into manageable steps by first developing uniform inbred lines with specific trait combinations, then systematically crossing these lines to accumulate desired traits while maintaining selection precision through controlled mating designs
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV181138. The invention thus relates to the plants, seeds and tissue cultures of the variety CV181138, and to methods for producing a corn plant produced by crossing a corn plant of variety CV181138 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 CV181138 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 CV181138.