Hybrid Corn CH611387 Breeding Uniformity via CMS and Inbreeding
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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 CH611387, which includes genetic loci for traits like male sterility, herbicide resistance, and disease resistance, utilizing cytoplasmic-male sterility and transgenes integrated through genetic transformation, along with specific breeding processes to control pollination and produce uniform hybrid seeds.
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 patent applies preliminary action by developing homozygous inbred plants through multiple generations of self-pollination before creating the hybrid cross. This preliminary inbreeding process ensures that the parent plants are genetically uniform and stable, which then produces predictable and uniform hybrid progeny when crossed, thereby resolving the contradiction between trait combination capability and performance uniformity.
2Stability of the object's composition
If self-pollination is used to develop homozygous inbred plants, then genetic uniformity is improved, but the time to develop stable varieties worsens
Solution Approach 1:
The patent applies parameter changes by utilizing cytoplasmic male sterility (CMS) systems that alter the pollination parameter from self-pollination to cross-pollination. This enables the production of uniform hybrid seeds through controlled cross-pollination of CMS lines with restorer lines, significantly reducing the breeding time required to achieve genetic uniformity and stable varieties compared to traditional self-pollination methods.
3Adaptability or versatility
If traditional breeding methods are used to develop hybrid varieties, then genetic diversity is maintained, but manufacturing precision of uniform hybrid seeds worsens
Solution Approach 1:
The patent applies the intermediary principle by introducing cytoplasmic male sterility lines as mediators in the breeding process. These CMS lines serve as intermediaries that when crossed with restorer lines, produce uniform F1 hybrid seeds with predictable genetics. This intermediary approach maintains genetic diversity in the breeding population while ensuring high manufacturing precision and uniformity in the produced hybrid seeds.
Data Source
AI summary
According to the invention, there is provided seed and plants of the hybrid corn variety designated CH611387. The invention thus relates to the plants, seeds and tissue cultures of the variety CH611387, and to methods for producing a corn plant produced by crossing a corn plant of variety CH611387 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 CH611387.