Maize Inbred PH4CHD Breeding Stability
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, taking six to twelve years from the first cross to the delivery of finished seed, and existing technologies face challenges in combining desirable traits such as disease resistance, drought tolerance, and high yield in a stable and agronomically sound manner.
Innovation Solution
The introduction of the novel maize variety PH4CHD, which can be crossed with other maize plants to introduce desired traits through backcross conversion, genetic manipulation, and transformation, incorporating cytoplasmic or nuclear factors for male sterility and other beneficial characteristics, and the use of tissue culture to regenerate plants with specific physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then stable and agronomically sound varieties are achieved, but the development time becomes excessively long (6-12 years)
Solution Approach 1:
The patent creates a preliminary inbred line PH4CHD with optimized genetic composition and desirable traits before hybrid development, allowing faster subsequent breeding. The inbred line is pre-characterized for stability, disease resistance, and agronomic performance, reducing the time needed for later variety development while maintaining reliability.
Solution Approach 2:
The patent modifies genetic parameters by creating a specific inbred line with defined genetic characteristics through controlled breeding and selection. This changes the genetic composition parameters to achieve both stability and reduced development time, as the pre-established inbred line serves as a reliable foundation for future hybrid development.
2Productivity
If multiple desirable traits are combined in a single variety, then yield and agronomic performance are improved, but the complexity of the breeding process increases
Solution Approach 1:
The patent merges multiple desirable traits including disease resistance, drought tolerance, and high yield potential into a single inbred line PH4CHD through systematic breeding and selection. This consolidation of traits into one parental line simplifies subsequent hybrid development while maintaining high productivity and agronomic performance.
Solution Approach 2:
The inbred line PH4CHD is designed as a universal parental line that can be crossed with multiple different inbred lines to produce various hybrids, all inheriting its desirable traits. This multi-functionality reduces breeding process complexity by using a single versatile parent rather than developing separate lines for each hybrid combination.
3Stability of the object's composition
If extensive breeding and selection processes are conducted to ensure uniformity across environments, then variety stability is achieved, but the time and resources required increase significantly
Solution Approach 1:
The patent performs preliminary extensive breeding and selection to establish inbred line PH4CHD with proven uniformity and stability across multiple environments before commercial deployment. This preliminary characterization ensures that subsequent hybrids inherit these stable traits, reducing the need for repeated extensive testing and saving time in the long term.
Data Source
AI summary
A novel maize variety designated PH4CHD and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH4CHD with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH4CHD through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby are provided. Hybrid maize seed, plants or plant parts are produced by crossing the variety PH4CHD or a locus conversion of PH4CHD with another maize variety.