Hybrid Corn CH680747 Breeding for Genetic Uniformity

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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 CH680747, 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 tissue culture techniques to regenerate plants with specific characteristics.

Engineering Contradictions & Design Principles

VSEngineering 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

Engineering Contradiction:

Improvegenetic diversityVSAvoidgenetic uniformity

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The breeding process is segmented into distinct phases: first developing homozygous inbred parent lines through self-pollination to ensure genetic uniformity, then crossing these standardized inbreds to produce uniform hybrid progeny. This segmentation allows each phase to optimize for its specific goal without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inbred parent lines are developed and standardized through multiple generations of self-pollination and selection before the actual hybrid cross. This preliminary action ensures that the parental genomes are fully homozygized and characterized, so that their cross produces predictable, uniform hybrid offspring with consistent trait expression.

Inventive Principle:

Principle #10Preliminary action

2Stability of the object's composition

If self-pollination is used to develop inbred plants, then genetic uniformity is improved, but genetic diversity deteriorates

Engineering Contradiction:

Improvegenetic uniformityVSAvoidgenetic diversity

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

Self-pollination and selection are performed as a preliminary action to develop homozygous inbred parent lines with uniform genetics. Once these standardized inbreds are established, they serve as controlled parental sources that, when crossed, generate hybrid progeny with restored genetic diversity and heterosis while maintaining uniformity within each hybrid family.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If traditional breeding methods are used, then natural genetic variation is preserved, but breeding precision and trait specificity deteriorate

Engineering Contradiction:

Improvenatural genetic variationVSAvoidbreeding precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

Traditional mechanical pollination and selection methods are replaced with molecular marker-based identification and genetic transformation techniques. This substitution enables precise tracking and selection of specific genetic loci, allowing breeders to accurately introduce desired traits while maintaining overall genetic variation in the population.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS7601899B1Plants and seeds of hybrid corn variety CH680747

Publication Date: 2009.10.13 MONSANTO TECHNOLOGY LLC

AI summary

According to the invention, there is provided seed and plants of the hybrid corn variety designated CH680747. The invention thus relates to the plants, seeds and tissue cultures of the variety CH680747, and to methods for producing a corn plant produced by crossing a corn plant of variety CH680747 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 CH680747.