Corn Variety CV959861 Breeding for Predictable Hybrid Traits
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Solution Overview
Problem
Corn breeding aims to combine desirable traits like yield, disease resistance, and uniformity, but existing methods struggle to develop stable inbred plants with predictable performance due to genetic non-uniformity from cross-pollination, leading to unpredictable hybrid traits.
Innovation Solution
The development of the corn variety CV959861, which includes a cytoplasmic or nuclear factor for male sterility to prevent self-pollination, along with specific genetic loci for traits like herbicide tolerance and disease resistance, and the use of tissue cultures to regenerate plants with consistent physiological and morphological 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 genetic non-uniformity and unpredictable performance occur
Solution Approach 1:
The breeding program segments the corn population into distinct inbred lines through repeated self-pollination, creating uniform genetic backgrounds that can be reliably crossed. This segmentation allows controlled combination of desirable traits while maintaining predictability through standardized inbred parent lines.
Solution Approach 2:
The patent applies preliminary action by developing and stabilizing inbred parent lines before creating hybrids. Through multiple generations of self-pollination and selection, desirable traits are fixed in purebred lines beforehand, ensuring that when these lines are crossed, the hybrid performance is predictable and uniform.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity and stability are improved, but loss of genetic diversity occurs
Solution Approach 1:
The breeding program maintains genetic diversity by developing multiple separate inbred lines, each fixed for different desirable traits. These segmented inbred lines serve as diverse building blocks that can be crossed to create hybrids with varied combinations of traits, preserving overall genetic diversity while maintaining uniformity within each line.
Solution Approach 2:
Different inbred lines are developed with specific local qualities or trait combinations tailored to particular purposes. Each inbred line has uniform genetics for its designated traits, allowing precise control over hybrid characteristics when lines are crossed, thereby maintaining diversity through targeted trait specialization.
3Stability of the object's composition
If multiple generations of selfing and selection are performed to develop inbred plants, then homozygosity and uniformity are improved, but breeding time and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing a core set of stable inbred lines with desired traits before hybrid development is needed. This preliminary development of uniform inbred parents allows subsequent hybrid creation to proceed more quickly and predictably, reducing the overall breeding cycle time while maintaining homozygosity.
Solution Approach 2:
The inbred lines developed through extensive selfing and selection serve multiple functions: they can be used to create various hybrid combinations, serve as parental lines for future breeding programs, and provide stable genetic backgrounds for trait analysis. This multi-functionality justifies the time investment in developing universal inbred lines.
Data Source
AI summary
According to the invention, there is provided seed and plants of the corn variety designated CV959861. The invention thus relates to the plants, seeds and tissue cultures of the variety CV959861, and to methods for producing a corn plant produced by crossing a corn plant of variety CV959861 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 CV959861 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 CV959861.