Maize Inbred PH1CDJ Homozygous Traits for Hybrid Uniformity

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Solution Overview

Problem

Current maize breeding techniques face challenges in combining desirable traits such as disease resistance, drought tolerance, and uniformity, which are essential for efficient crop production and mechanical harvesting.

Innovation Solution

Development of the novel maize variety PH1CDJ, which is homozygous and can be reproduced through self-pollination, and its use in breeding processes to create hybrid seeds with improved traits through backcross conversion and transformation, ensuring uniformity and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional plant breeding methods are used to combine desirable traits, then disease resistance and drought tolerance can be achieved, but uniformity of plant characteristics deteriorates

Engineering Contradiction:

Improvedisease resistanceVSAvoiduniformity of plant characteristics

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The breeding program segments the combination of desirable traits by using PH1CDJ as a standardized parental line that contributes a consistent set of traits (disease resistance, drought tolerance, uniformity) to multiple hybrid combinations. This segmentation allows each hybrid to reliably inherit the uniformity characteristics from PH1CDJ while combining with other parental traits.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention changes the genetic parameters of the maize variety by developing PH1CDJ with specific homozygous genotypes that fix desirable traits. Through selective breeding and genetic analysis, the variety was optimized to have consistent phenotypic expressions for uniformity, disease resistance, and drought tolerance that can be reliably transmitted to hybrids.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If traditional plant breeding methods are used to combine desirable traits, then drought tolerance can be achieved, but uniformity of plant characteristics deteriorates

Engineering Contradiction:

Improvedrought toleranceVSAvoiduniformity of plant characteristics

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

3Productivity

If mechanical harvesting is implemented, then productivity increases, but the requirement for uniformity of plant characteristics increases

Engineering Contradiction:

Improveharvest efficiencyVSAvoiduniformity of plant characteristics

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The variety PH1CDJ serves as a standardized genetic template that can be copied and used as a parent in multiple hybrid combinations. This copying of the proven genetic base ensures that each new hybrid inherits the same uniformity characteristics, making the variety suitable for mechanical harvesting across different production environments.

Inventive Principle:

Principle #26Copying

4Adaptability or versatility

If multiple desirable traits are combined in a single variety, then adaptability improves, but the complexity of breeding processes increases

Engineering Contradiction:

Improveenvironmental adaptabilityVSAvoidbreeding process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The variety PH1CDJ is designed with multi-functionality, serving as a universal parental line that can be crossed with various other maize lines to produce hybrids with different combinations of traits. This universal base provides disease resistance, drought tolerance, and uniformity across multiple hybrid applications, reducing the need to develop separate breeding programs for each trait combination.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8536421B1Maize variety inbred PH1CDJ

Publication Date: 2013.09.17 PIONEER HI BREED INTERNATIONAL INC

AI summary

A novel maize variety designated PH1CDJ and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH1CDJ with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH1CDJ through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the variety PH1CDJ or a locus conversion of PH1CDJ with another maize variety.