Hybrid Corn CH010390 CMS System for Genetic Stability
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Solution Overview
Problem
The challenge in corn breeding is to develop hybrid varieties that combine desirable traits such as high yield, disease resistance, and uniformity, while maintaining genetic stability and avoiding self-pollination.
Innovation Solution
The development of the hybrid corn variety CH010390, which includes a cytoplasmic or nuclear factor for male sterility or self-incompatibility, along with genetic modifications that confer traits like herbicide resistance, insect resistance, and altered metabolism, is achieved through advanced breeding techniques and genetic transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different parents, then genetic diversity and trait combination are improved, but self-pollination control becomes more difficult and genetic stability may be compromised
Solution Approach 1:
The patent introduces a cytoplasmic male sterility system as an intermediary mechanism to control pollination. The CMS system acts as a mediator between the desired cross-pollination for trait combination and the need for genetic stability through controlled self-pollination prevention. This allows the female parent to be pollinated only by the male parent, ensuring genetic stability while enabling desirable trait combination.
2Productivity
If male sterility factors are introduced to prevent self-pollination, then hybrid seed production is improved, but plant fertility and breeding flexibility are reduced
Solution Approach 1:
The patent segments the corn population into distinct male-sterile female parents and fertile male parents. This segmentation allows the male-sterile lines to be used exclusively for hybrid seed production as female parents, while fertile lines serve as male parents. This division of labor maintains high hybrid seed production while preserving breeding flexibility through the availability of multiple fertile male lines.
Solution Approach 2:
The cytoplasmic male sterility system serves as an intermediary that enables controlled cross-pollination between specific male and female lines. This intermediary mechanism ensures that female plants cannot self-pollinate, thereby guaranteeing hybrid seed production, while the system itself can be maintained through backcrossing to restore fertility in maintaining lines.
3Stability of the object's composition
If inbred lines are developed through repeated self-pollination, then genetic uniformity is improved, but loss of heterosis and vigor is increased
Solution Approach 1:
The patent applies preliminary action by developing highly uniform inbred lines through repeated self-pollination before creating the hybrid. These inbred lines serve as stable genetic foundations that, when crossed, produce vigorous F1 hybrids. The preliminary inbreeding establishes genetic uniformity and stability, while the subsequent cross restores heterosis and vigor in the hybrid generation.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH010390. The invention thus relates to the plants, seeds and tissue cultures of the variety CH010390, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010390 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 CH010390.