Hybrid Corn Variety CH010517 for Stable Purity and Trait Stacking
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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 CH010517, 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
1Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity and stability are improved, but genetic diversity is reduced
Solution Approach 1:
The breeding program segments the development process into distinct phases: first developing homozygous inbred lines through self-pollination for genetic stability, then creating hybrid combinations of these inbreds to restore genetic diversity. This segmentation allows each phase to optimize for its specific goal without compromise.
Solution Approach 2:
The patent inverts the typical breeding sequence by first creating genetically diverse hybrid populations through cross-pollination of diverse inbreds, then selecting and self-pollinating the most promising hybrids to create stable inbred lines. This inversion allows diversity to be captured early while still achieving the stability needed for commercial production.
2Adaptability or versatility
If cross-pollination is used to create hybrid plants, then genetic diversity and heterosis are improved, but uniformity and stability of the hybrid population are reduced
Solution Approach 1:
The patent applies local quality by creating specific localized hybrid populations from carefully selected inbred parents with complementary traits. Each hybrid population is developed with specific quality characteristics tailored to particular agricultural needs, such as drought tolerance in one region or disease resistance in another, while maintaining overall uniformity within that localized population.
Solution Approach 2:
The breeding program incorporates feedback mechanisms where hybrid performance is evaluated in controlled trials, and the results feed back into the selection of parent inbreds for subsequent crosses. This iterative feedback process ensures that only hybrids demonstrating consistent uniformity and desired traits are advanced, progressively improving population stability.
3Manufacturing precision
If emasculation and bagging techniques are used to control pollination, then hybrid purity is improved, but device complexity and labor requirements increase
Solution Approach 1:
The patent employs self-service by utilizing the plant's own biological mechanisms to achieve pollination control. Cytoplasmic male sterility systems enable female plants to automatically prevent self-pollination without external intervention, while male plants naturally provide pollen. This biological self-service eliminates the need for complex mechanical emasculation devices and reduces labor requirements while maintaining high hybrid purity.
Solution Approach 2:
The patent replaces mechanical pollination control systems (emasculation tools, manual bagging) with biological control mechanisms. Cytoplasmic male sterility and nuclear restorer gene systems provide automatic pollination control through genetic mechanisms, substituting complex mechanical operations with inherent plant biology to achieve the same purity outcome with reduced complexity.
4Productivity
If multiple desirable traits are combined in a single hybrid, then agricultural performance is improved, but breeding complexity and time requirements increase
Solution Approach 1:
The patent merges multiple desirable traits into specific inbred lines through targeted cross-pollination of parents carrying different traits. By combining drought tolerance genes, disease resistance genes, and high-yield genes into distinct inbred lines before creating the final hybrid, the breeding program efficiently integrates multiple traits without requiring complex multi-generation breeding sequences.
Solution Approach 2:
The patent applies preliminary action by pre-developing and pre-testing inbred lines with specific desirable traits in controlled environments before final hybrid creation. This preliminary development and selection of trait-carrying inbreds simplifies the subsequent hybrid breeding process, as the complex trait combination work is completed in advance during inbred line development rather than during the final hybrid generation.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the hybrid corn variety designated CH010517. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CH010517, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010517 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 CH010517.