Hybrid Corn CH244692 Breeding via Segmentation and Intermediary Lines
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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 CH244692, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, utilizing cytoplasmic-male sterility and transgenes integrated at a single chromosomal location, 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 develop hybrid corn varieties, then genetic diversity and trait combination are improved, but genetic uniformity and predictability deteriorate
Solution Approach 1:
The breeding process is segmented into distinct phases: first developing uniform inbred parental lines through self-pollination, then using controlled cross-pollination only for hybrid production. This segmentation allows genetic diversity to be introduced only when needed, while maintaining uniformity in the parental stock.
Solution Approach 2:
Inbred parental lines are developed and stabilized through multiple generations of self-pollination before hybrid production begins. This preliminary action ensures that the parental lines are genetically uniform and stable, which then enables predictable hybrid performance when cross-pollination occurs.
2Stability of the object's composition
If inbred plants are developed through self-pollination, then genetic uniformity is improved, but adaptability and trait diversity worsen
Solution Approach 1:
The inbred parental lines serve as intermediaries that carry specific desirable traits. These uniform inbred lines are then crossed with other inbred lines to combine traits in the hybrid, allowing both uniformity in parents and diversity in traits to coexist.
Solution Approach 2:
Multiple inbred lines, each developed with specific desirable traits through self-pollination, are merged through controlled cross-pollination to create hybrids that combine the advantages of each parent while maintaining uniformity within the hybrid population.
3Adaptability or versatility
If traditional breeding methods are used, then trait combination flexibility is improved, but breeding time and complexity worsen
Solution Approach 1:
Inbred parental lines are developed and maintained as stable, pre-characterized genetic resources with known traits. This preliminary action allows breeders to quickly combine traits in subsequent crosses without repeating the lengthy process of developing uniform parental lines each time.
Solution Approach 2:
The breeding approach changes from developing hybrids directly through repeated crossing and selection to using pre-developed inbred lines as standardized parameters. This parameter change from direct hybrid development to inbred-line-based breeding significantly reduces time while maintaining trait combination flexibility.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH244692. The invention thus relates to the plants, seeds and tissue cultures of the variety CH244692, and to methods for producing a corn plant produced by crossing a corn plant of variety CH244692 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 CH244692.