PH4C5Z Maize Inbred Line for Accelerated Stable Hybrid Breeding
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Solution Overview
Problem
The development of new maize varieties is a time-consuming process that requires years to combine desirable traits such as disease resistance, drought tolerance, and high yield, posing challenges in efficiently producing stable and high-yielding maize hybrids for diverse environments.
Innovation Solution
The introduction of the novel maize variety PH4C5Z, which can be crossed with other maize plants to incorporate traits like male sterility, disease resistance, and herbicide tolerance through backcross conversion, genetic manipulation, and transformation, along with the use of cytoplasmic inheritance for male sterility and transgenic methods to enhance hybrid seed production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional breeding methods are used to develop new maize varieties, then desirable traits can be combined, but the process is time-consuming and takes 6-12 years
Solution Approach 1:
The patent applies preliminary action by pre-establishing inbred lines with desirable traits through backcrossing and genetic manipulation before the main breeding cycle. This allows the base germplasm to be prepared in advance, reducing the time needed for subsequent hybrid development and accelerating the overall breeding process while maintaining trait combination capability.
2Reliability
If multiple desirable traits are combined in a single variety, then agronomic performance improves, but development complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into distinct phases: (1) development of inbred lines with specific traits through backcrossing, (2) evaluation and selection of inbreds, and (3) hybridization to produce final varieties. This modular approach allows complex trait combinations to be managed systematically, improving reliability while controlling development complexity through structured progression.
Solution Approach 2:
The patent uses inbred lines as intermediary components that bridge the gap between parent varieties and final hybrids. These inbreds serve as standardized building blocks with known traits, simplifying the overall breeding program by allowing systematic combination through controlled crossings rather than direct complex multi-parent crosses.
3Stability of the object's composition
If inbred lines are developed through multiple generations of selfing, then homozygosity and uniformity improve, but the time required for seed production increases
Solution Approach 1:
The patent applies preliminary action by completing multiple generations of selfing and inbreeding in advance to establish stable inbred lines before the final hybridization step. This pre-preparation ensures genetic uniformity and stability are achieved beforehand, allowing the time-intensive inbreeding process to be completed before the critical hybrid seed production phase, thus minimizing overall time loss.
Data Source
AI summary
A novel maize variety designated PH4C5Z and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH4C5Z with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH4C5Z 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 PH4C5Z or a locus conversion of PH4C5Z with another maize variety.