Hybrid Corn CH859703 Breeding Segmentation
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Solution Overview
Problem
Current 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 CH859703, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, utilizing 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 process is divided into distinct phases: first developing homozygous inbred lines through repeated self-pollination, then crossing these stabilized lines to produce uniform F1 hybrids. This segmentation ensures that each phase achieves its specific goal of either maximizing diversity (inbreeding phase) or maximizing uniformity (hybrid phase).
Solution Approach 2:
Before producing the final hybrid, the patent performs preliminary self-pollination and selection over multiple generations to develop homozygous inbred parent lines. This preliminary action stabilizes the genetic background of the parents, ensuring that when they are crossed, the F1 hybrids exhibit uniform and predictable phenotypes despite the diversity introduced during the inbreeding phase.
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 inbred lines are developed through repeated self-pollination, where each plant serves as its own pollinator. This self-service mechanism naturally progresses the population toward homozygosity without requiring external intervention, simplifying the breeding process despite the multiple generations involved. The plants essentially breed themselves to achieve the desired genetic stability.
3Adaptability or versatility
If traditional breeding methods are used to develop new varieties, then genetic diversity is improved, but development time and productivity worsen
Solution Approach 1:
The patent performs preliminary development of homozygous inbred lines before producing the final hybrid variety. This preliminary action, while time-consuming, creates genetically stable parents that can be crossed to produce uniform F1 hybrids with desirable traits. The investment of time in the preliminary inbreeding phase pays off in the efficiency and uniformity of the final hybrid production.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH859703. The invention thus relates to the plants, seeds and tissue cultures of the variety CH859703, and to methods for producing a corn plant produced by crossing a corn plant of variety CH859703 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 CH859703.