Hybrid Corn CH768004 Breeding for Uniform Yield
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Solution Overview
Problem
Corn breeding techniques face challenges in developing uniform hybrid varieties with desirable traits such as high yield, disease resistance, and uniform germination due to genetic non-uniformity and unpredictability in cross-pollination, requiring the development of stable inbred plants and specific breeding methods.
Innovation Solution
The development of the hybrid corn variety CH768004, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, using cytoplasmic-male sterility and genetic transformation techniques to introduce desired traits, and a method for crossing parent plants to produce hybrid seeds with controlled pollination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination is used to combine desirable traits from different plants, then genetic diversity and trait combination are improved, but genetic non-uniformity and performance unpredictability worsen
Solution Approach 1:
The breeding program segments the population into distinct inbred lines through repeated self-pollination, creating uniform genetic blocks that can be reliably crossed. This segmentation allows controlled combination of desirable traits while maintaining uniformity within each line, resolving the contradiction between trait diversity and performance uniformity.
Solution Approach 2:
The patent applies preliminary action by developing and stabilizing inbred lines through multiple generations of self-pollination and selection before creating hybrids. This preliminary development ensures genetic uniformity and predictability in the parent lines, which then produce uniform hybrid offspring, solving the reliability issue while maintaining trait combination capabilities.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity is improved, but breeding complexity and time required worsen
Solution Approach 1:
The self-pollination process is a self-service mechanism where the plant pollinates itself automatically, eliminating the need for complex人工 intervention. This natural self-service approach achieves genetic uniformity through repeated self-pollination generations while keeping the breeding process relatively simple and manageable.
3Adaptability or versatility
If recurrent selection and pedigree breeding are used to develop hybrid parents, then desirable traits are combined, but breeding time and resource requirements worsen
Solution Approach 1:
The patent applies preliminary action by pre-developing and stabilizing inbred lines through multiple generations of self-pollination and selection before the actual hybrid crossing. This preliminary work, though time-consuming, creates uniform parent lines that can be crossed efficiently, reducing the overall breeding cycle time and resource requirements compared to developing uniformity during the crossing process itself.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH768004. The invention thus relates to the plants, seeds and tissue cultures of the variety CH768004, and to methods for producing a corn plant produced by crossing a corn plant of variety CH768004 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 CH768004.