Corn Variety CV165560 Breeding Segmentation
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing uniform corn hybrids with desirable traits such as enhanced yield, disease resistance, and uniformity, as they often result in unpredictable performance due to genetic non-uniformity among progeny plants.
Innovation Solution
The development of the corn variety CV165560, which involves crossing plants to introduce desired traits through self-pollination and backcrossing, ensuring stability and uniformity by selecting for specific loci and maintaining physiological and morphological characteristics, and the introduction of transgenes for additional traits like herbicide tolerance and disease resistance.
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 progeny performance deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: creating heterozygous hybrids through cross-pollination, then self-pollinating to create homozygous inbred lines. This segmentation allows the benefits of genetic diversity in the F1 generation to be captured, then fixed in subsequent generations through repeated selfing and selection, resolving the contradiction between trait combination and uniformity.
Solution Approach 2:
The patent applies preliminary action by creating and evaluating F1 hybrid plants before developing the final inbred lines. The F1 generation serves as a preliminary step that combines desirable traits from different parents, and only the most promising F1 hybrids are used to develop the homozygous inbred lines, ensuring that uniformity is achieved based on pre-selected genetic combinations.
2Reliability
If self-pollination is used to create uniform homozygous plants, then uniformity and breeding stability are improved, but genetic diversity and adaptability to new traits deteriorate
Solution Approach 1:
The breeding system is dynamic, allowing the breeder to switch between cross-pollination and self-pollination modes as needed. Cross-pollination is used when genetic diversity and new trait combinations are required, while self-pollination is used when uniformity and breeding stability are prioritized. This dynamic switching resolves the contradiction by applying the appropriate method at the appropriate stage.
3Reliability
If multiple breeding generations are performed to achieve homozygosity, then uniformity of true-breeding progeny is improved, but time required for breed development increases
Solution Approach 1:
The patent employs feedback through systematic evaluation of F1 hybrid plants and selection of the most promising lines for further self-pollination. This feedback mechanism allows the breeder to identify and retain only the most uniform and desirable lines, accelerating the process of achieving homozygosity by focusing resources on the most promising genetic combinations rather than treating all lines equally.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV165560. The invention thus relates to the plants, seeds and tissue cultures of the variety CV165560, and to methods for producing a corn plant produced by crossing a corn plant of variety CV165560 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 CV165560 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 CV165560.