Corn Variety CV797257 Breeding for Uniformity and Stability

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Solution Overview

Problem

Corn breeding aims to combine desirable traits like higher yield, disease resistance, and uniformity, but existing methods struggle to produce stable inbred plants with predictable performance due to genetic non-uniformity in hybrid populations.

Innovation Solution

The development of the corn variety CV797257, which includes a cytoplasmic or nuclear factor for male sterility and genetic modifications such as single locus conversions for traits like herbicide tolerance and disease resistance, along with tissue cultures capable of regenerating plants with consistent morphological and physiological characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional breeding methods are used to develop corn hybrids, then genetic diversity is maintained, but uniformity and predictability of performance are reduced

Engineering Contradiction:

Improvepredictability of performanceVSAvoiduniformity of population

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The breeding process is segmented into distinct phases: developing homozygous inbred lines through repeated self-pollination, then crossing specific inbred pairs to produce uniform F1 hybrids. This segmentation allows each phase to be optimized independently, ensuring both uniformity and predictability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the genetic uniformity parameter by using inbred lines that are homozygous at almost all gene loci. This parameter change from heterogeneous to homogeneous genetic composition enables predictable performance while maintaining the ability to introduce desirable traits through controlled crosses.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If inbred plants are developed through self-pollination and selection, then uniformity is achieved, but time to reach stable varieties increases

Engineering Contradiction:

Improvehomozygosity of inbred linesVSAvoidtime for breeding cycles

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

Inbred lines are developed preliminarily and stored as genetic resources before being crossed. This preliminary development of homozygous lines allows breeders to quickly create new hybrids by crossing pre-developed inbreds, reducing the overall time for variety development while maintaining stability.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If multiple desirable traits are combined in a single variety, then agronomic quality improves, but complexity of breeding program increases

Engineering Contradiction:

Improvenumber of desirable traitsVSAvoidcomplexity of breeding program

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Inbred lines are developed with multiple desirable traits (yield, disease resistance, stress tolerance) that can be universally applied in various hybrid combinations. This multi-functionality allows the same inbred line to contribute to multiple different hybrids, simplifying the breeding program while achieving complex trait combinations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10959388B2Plants and seeds of corn variety CV797257

Publication Date: 2021.03.30 MONSANTO TECHNOLOGY LLC

AI summary

According to the invention, there is provided seed and plants of the corn variety designated CV797257. The invention thus relates to the plants, seeds and tissue cultures of the variety CV797257, and to methods for producing a corn plant produced by crossing a corn plant of variety CV797257 with itself or with another corn plant, such as a plant of another variety. The invention further relates to corn seeds and plants produced by crossing plants of variety CV797257 with plants of another variety, such as another inbred line. The invention further relates to the inbred and hybrid genetic complements of plants of variety CV797257.