Hybrid Corn CH747345 Breeding via Segmentation and Preliminary Action
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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 in cross-pollinated plants, which affects performance predictability.
Innovation Solution
The development of the hybrid corn variety CH747345, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, using cytoplasmic-male sterility (CMS) and transgenes integrated at specific chromosomal locations, along with tissue culture methods for regenerating plants with consistent physiological and morphological characteristics.
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 increases making performance unpredictable
Solution Approach 1:
The breeding process is segmented into distinct phases: creating homozygous inbred lines through multiple generations of self-pollination, then crossing these uniform lines to produce uniform F1 hybrids. This segmentation allows control over genetic uniformity at different stages.
Solution Approach 2:
Before crossing different plants to combine traits, the patent performs preliminary self-pollination and selection for 5-10 generations to create homozygous inbred lines. This preliminary action ensures genetic uniformity is established before the actual crossing event.
2Stability of the object's composition
If self-pollination is used to create uniform true-breeding plants, then genetic uniformity is improved, but the ability to combine diverse desirable traits is reduced
Solution Approach 1:
The patent performs preliminary self-pollination for 5-10 generations to create homozygous inbred lines with uniform genetics, then uses these uniform lines as parents for crossing. This preliminary action establishes the foundation for subsequent trait combination.
Solution Approach 2:
The patent creates copies of desirable traits by self-pollinating plants for multiple generations until homozygosity is achieved. Each generation copies and reinforces the desired traits, creating uniform genetic copies that can then be combined through crossing.
3Stability of the object's composition
If multiple generations of selfing and selection are performed to develop homozygous inbreds, then genetic uniformity is improved, but breeding time and complexity increase
Solution Approach 1:
The patent applies partial action by performing self-pollination for a specific number of generations (5-10) rather than until theoretical complete homozygosity. This partial action achieves sufficient uniformity for breeding purposes while limiting the time required.
Solution Approach 2:
The patent uses feedback through phenotypic selection at each generation, observing and selecting plants with desired traits to continue self-pollination. This feedback mechanism accelerates the process by directing breeding efforts toward achieving homozygosity for specific desirable characteristics.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH747345. The invention thus relates to the plants, seeds and tissue cultures of the variety CH747345, and to methods for producing a corn plant produced by crossing a corn plant of variety CH747345 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 CH747345.