Hybrid Corn Breeding Using CMS for Stable Trait Uniformity
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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 preventing self-pollination.
Innovation Solution
The development of the hybrid corn variety CH010371, which includes genetic modifications for traits like herbicide resistance, disease resistance, and cytoplasmic male sterility, achieved through backcrossing and genetic transformation, ensuring uniformity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional breeding techniques are used to develop corn hybrids, then genetic diversity is maintained, but uniformity and stability of desirable traits are difficult to achieve
Solution Approach 1:
The patent uses inbred lines as intermediary parental stocks that have been pre-selected for uniformity and stability of desirable traits. These inbred lines serve as mediators to transfer specific traits (yield, disease resistance, drought tolerance) to the hybrid offspring, ensuring consistent trait expression while simplifying the breeding process through controlled crosses between standardized parental lines
2Manufacturing precision
If self-pollination is prevented through cytoplasmic male sterility, then hybrid uniformity is improved, but breeding process complexity increases
Solution Approach 1:
The patent employs cytoplasmic male sterility (CMS) in the female parental line, which is a self-service mechanism where the plant's own cytoplasmic genetics automatically prevent self-pollination. The CMS trait causes male sterility without human intervention, ensuring 100% cross-pollination and hybrid uniformity while eliminating the need for manual emasculation or complex pollination control systems
Solution Approach 2:
The patent changes the physiological parameter of pollen production by introducing cytoplasmic male sterility. This parameter change transforms the female parent from a fertile to a sterile state, automatically preventing self-pollination and ensuring hybrid uniformity without requiring external mechanical or manual intervention in the pollination process
3Productivity
If multiple desirable traits are incorporated into a single hybrid, then agricultural productivity is improved, but breeding difficulty increases
Solution Approach 1:
The patent merges multiple desirable traits (yield, disease resistance, drought tolerance) into a single hybrid by selecting inbred parental lines that each contribute specific trait combinations. Through controlled crossing of these pre-characterized inbred lines, the hybrid consolidates multiple agronomically important traits, improving overall agricultural productivity while managing breeding complexity through systematic trait accumulation
4Stability of the object's composition
If inbred parental lines are developed through recurrent selection, then genetic stability is improved, but time to maturity increases
Solution Approach 1:
The patent applies preliminary action by developing and stabilizing inbred parental lines through recurrent selection before the actual hybrid production. This pre-establishment of genetically stable inbred lines with known trait profiles allows for rapid hybrid deployment without repeating the lengthy stabilization process, reducing the time from breeding program initiation to commercial hybrid release while maintaining genetic stability
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH010371. The invention thus relates to the plants, seeds and tissue cultures of the variety CH010371, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010371 with itself or with another corn plant, such as a plant of another variety. The invention further relates to genetic complements of plants of variety CH010371.