Hybrid Corn Pollination Control for Uniform Trait Stability
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Solution Overview
Problem
Existing corn breeding methods struggle to develop hybrids with uniformity and stability, incorporating desirable traits such as yield, disease resistance, and drought tolerance, while maintaining genetic diversity and avoiding self-pollination.
Innovation Solution
The development of the hybrid corn variety CH010550, which includes cytoplasmic or nuclear factors for male sterility, genetic modifications for traits like herbicide resistance and disease resistance, and a method for controlled cross-pollination using emasculation and bagging techniques to ensure hybrid purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to develop corn hybrids, then genetic diversity can be maintained, but uniformity and stability of desirable traits cannot be achieved
Solution Approach 1:
The patent segments the breeding process into distinct components: developing homozygous inbred parent lines with specific desirable traits, then crossing them to produce uniform hybrid offspring. This segmentation allows maintenance of genetic diversity in the parent pool while achieving uniformity in the hybrid product through controlled cross-pollination between genetically distinct but homozygous parents
Solution Approach 2:
The patent applies preliminary action by first developing and stabilizing homozygous inbred parent lines through multiple generations of self-pollination and selection before performing the cross. This preliminary homozygization ensures that the resulting hybrids will exhibit uniform and stable expression of desirable traits from both parents
2Ease of manufacture
If self-pollination is allowed in corn breeding, then maintaining homozygous lines is easier, but hybrid purity and prevention of self-pollination become problematic
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of physical barriers (bags) and temporal control measures to prevent unwanted self-pollination. The female parent is bagged to exclude pollen, and pollination is controlled by timing the release of male parent pollen only when female silks are receptive, ensuring hybrid purity while allowing the use of self-pollination for maintaining parent lines
3Reliability
If extensive breeding programs are conducted to develop superior inbred plants, then desirable characteristics can be achieved, but time and resource consumption increase
Solution Approach 1:
The patent replaces lengthy phenotypic selection processes with molecular marker-assisted selection techniques. By using DNA markers linked to desirable traits, breeders can identify and select plants carrying target genes early in the breeding process, dramatically reducing the time required to develop superior inbred lines compared to traditional multi-generation field testing
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the hybrid corn variety designated CH010550. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CH010550, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010550 with itself or with another corn plant, such as a plant of another variety. The disclosure further relates to genetic complements of plants of variety CH010550.