Hybrid Corn CH010994 Male Sterility Genetic Stability
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Solution Overview
Problem
Current corn breeding techniques face challenges in developing hybrid varieties that combine desirable traits such as high yield, disease resistance, and uniformity, while maintaining genetic stability and avoiding self-pollination, which limits the introduction of new genetic modifications and traits.
Innovation Solution
The development of the hybrid corn variety CH010994, which incorporates a cytoplasmic or nuclear factor for male sterility, genetic modifications for herbicide resistance, and disease resistance, and a method for crossing plants to prevent self-pollination, allowing for the introduction of traits like waxy starch and altered metabolism through genetic transformation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If self-pollination is used to maintain genetic stability, then genetic uniformity is improved, but the introduction of new genetic modifications and traits is limited
Solution Approach 1:
The patent applies preliminary action by creating male-sterile inbred lines before hybrid development, which prevents self-pollination in the F1 generation and ensures that only controlled cross-pollination occurs. This preliminary preparation enables the introduction of new genetic modifications while maintaining genetic stability in the hybrid population.
Solution Approach 2:
The patent uses an intermediary approach by introducing male sterility genes as a controlling mechanism. These genes act as mediators that prevent self-pollination and ensure that only controlled cross-pollination between specific inbred lines occurs, thereby enabling the introduction of new traits while maintaining genetic uniformity in the hybrid.
2Adaptability or versatility
If cross-pollination is used to introduce new traits, then genetic diversity is improved, but genetic uniformity and stability are reduced
Solution Approach 1:
The patent applies local quality by creating male-sterile inbred lines with specific genetic modifications at particular loci. These inbred lines maintain uniformity within themselves while being designed to complement each other in the cross, allowing the introduction of specific new traits while maintaining overall genetic uniformity in the F1 hybrid.
Solution Approach 2:
The patent uses preliminary action by developing male-sterile inbred lines before the actual cross-pollination. This preliminary development ensures that the inbred lines are genetically uniform and stable, so that when cross-pollination occurs, the F1 hybrid maintains genetic uniformity while incorporating the desired new traits from the male-sterile parent.
3Productivity
If male sterility is introduced to prevent self-pollination, then hybrid seed production is improved, but the complexity of the breeding system increases
Solution Approach 1:
The patent applies self-service by using cytoplasmic male sterility (CMS) systems where the male sterility is inherited through the cytoplasm rather than requiring complex nuclear gene interactions. This self-service mechanism automatically prevents self-pollination without requiring additional control measures, simplifying the breeding system while improving hybrid seed production.
Solution Approach 2:
The patent uses parameter changes by utilizing cytoplasmic male sterility, which changes the mode of inheritance from nuclear to cytoplasmic. This parameter change simplifies the breeding system by eliminating the need for complex nuclear gene interactions and automatic control mechanisms, while still achieving effective prevention of self-pollination.
4Stability of the object's composition
If inbred lines are developed through self-pollination, then genetic uniformity is improved, but the time to crop maturity is extended
Solution Approach 1:
The patent applies preliminary action by developing male-sterile inbred lines before the hybrid development phase. This preliminary action allows the inbred lines to be established and tested independently, so that when the actual hybrid cross occurs, the time to crop maturity is not extended by additional self-pollination cycles.
Solution Approach 2:
The patent uses an intermediary approach by introducing male sterility as a controlling mechanism that allows the use of existing inbred lines without requiring further self-pollination. This intermediary mechanism enables the direct production of F1 hybrids from pre-existing inbred lines, thereby reducing the time needed to achieve genetic uniformity while maintaining it.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH010994. The invention thus relates to the plants, seeds and tissue cultures of the variety CH010994, and to methods for producing a corn plant produced by crossing a corn plant of variety CH010994 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 CH010994.