Hybrid Corn Variety Breeding for Uniformity and Hybrid Purity
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Solution Overview
Problem
Existing corn breeding techniques 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 CH010562, which includes cytoplasmic or nuclear factors for male sterility, genetic modifications for traits like herbicide resistance, and a method for controlled cross-pollination using emasculation and bagging techniques to ensure hybrid purity, combined with genome editing for precise trait introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional breeding techniques are used to develop hybrid corn, then genetic diversity can be maintained, but uniformity and stability of desirable traits are difficult to achieve
Solution Approach 1:
The breeding program segments the development process into distinct phases: creating homozygous inbred lines through repeated self-pollination, then crossing these standardized lines to produce uniform hybrids. This segmentation allows genetic diversity to be captured in the inbred lines while ensuring uniformity in the final hybrid product.
Solution Approach 2:
The patent applies preliminary action by developing and stabilizing inbred parental lines through multiple generations of self-pollination and selection before performing the actual hybrid cross. This preliminary standardization of parental genetics ensures that the resulting F1 hybrids exhibit uniform and stable expression of desirable traits.
2Manufacturing precision
If self-pollination is used to develop inbred lines, then uniformity of parental lines is improved, but self-incompatibility mechanisms may prevent successful breeding
Solution Approach 1:
The patent extracts or removes the barrier to self-pollination by utilizing corn varieties that lack self-incompatibility mechanisms. This allows the breeding program to successfully perform repeated self-pollination to develop homozygous inbred lines without being blocked by genetic self-recognition barriers.
Solution Approach 2:
The breeding process creates true-breeding copies of parental lines through self-pollination, where each inbred line becomes a standardized genetic copy that consistently produces identical progeny when selfed, enabling reliable hybrid production.
3Adaptability or versatility
If cross-pollination is used to produce hybrids, then desirable traits from different parents are combined, but contamination from unintended pollen sources reduces hybrid purity
Solution Approach 1:
The patent applies preliminary anti-action by implementing preventive measures against unintended cross-pollination: isolating parental lines in separate locations, using temporal isolation by staggering flowering times, and employing physical barriers. These preliminary protections prevent contamination before it can occur, ensuring high hybrid purity.
Solution Approach 2:
The breeding program uses controlled pollination environments and selective emasculation as intermediaries to manage pollen flow. By controlling which plants receive pollen and from which sources, the program ensures that only the intended parental combinations produce hybrid seed, maintaining purity while combining desirable traits.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the hybrid corn variety designated CH010562. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CH010562, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010562 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 CH010562.