Hybrid Corn Variety Breeding Using Male-Sterile Maintainer Lines
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Solution Overview
Problem
Existing corn breeding techniques struggle to develop hybrids with uniformity and stability, particularly in combining desirable traits such as yield, disease resistance, and drought tolerance, while maintaining efficient hybrid production methods.
Innovation Solution
The development of the hybrid corn variety CH010487, which incorporates cytoplasmic or nuclear factors for male sterility, genetic modifications for traits like herbicide resistance and disease resistance, and a method for controlled cross-pollination to ensure uniformity and stability, utilizing techniques like backcrossing and genetic transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If corn plants are self-pollinated to maintain genetic uniformity, then true breeding progeny are produced, but hybrid seed production is prevented
Solution Approach 1:
The plant population is divided into two distinct groups: male-sterile plants that cannot self-pollinate and maintainers that can self-pollinate. This segmentation allows hybrid seed production from male-sterile plants while preserving genetic uniformity in the maintainer population through self-pollination.
Solution Approach 2:
Male-sterile plants act as intermediaries in the breeding system. They receive pollen from maintainers and produce hybrid seeds without being able to self-pollinate, thus preventing the formation of uniform true-breeding progeny while enabling controlled hybrid seed production.
2Productivity
If male sterility is introduced to prevent self-pollination, then hybrid seed production is enabled, but plant fertility is reduced
Solution Approach 1:
The maintainer plants serve multiple functions: they provide pollen for male-sterile plants, maintain genetic uniformity through self-pollination, and ensure the continuity of the breeding system. This multi-functionality compensates for the fertility reduction in male-sterile plants.
Solution Approach 2:
The system changes the fertility parameter differently for different plant types: male-sterile plants have reduced fertility (cannot self-pollinate) to enable hybrid seed production, while maintainers retain full fertility to maintain the population. This differential parameter change resolves the contradiction.
3Adaptability or versatility
If multiple desirable traits are combined in a single variety, then breeding complexity increases, but uniformity and yield improve
Solution Approach 1:
Traits are combined and stabilized in maintainer plants through preliminary self-pollination and selection before being transferred to male-sterile plants. This preliminary action simplifies the overall breeding process by pre-establishing genetic uniformity and desired traits in the maintainer population.
Solution Approach 2:
The complex task of combining multiple desirable traits is extracted and performed separately in maintainer plants through controlled self-pollination and selection. Once these traits are stabilized, they are transferred to male-sterile plants, separating the complex breeding work from the final hybrid production.
Data Source
AI summary
According to the disclosure, there is provided seed and plants of the hybrid corn variety designated CH010487. The disclosure thus relates to the plants, seeds, and tissue cultures of the variety CH010487, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010487 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 CH010487.