Maize PHPKH Variety Breeding via Segmentation and Preliminary Action
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process that requires precise planning and efficient resource use, aiming to combine desirable traits such as disease resistance, drought tolerance, and high yield, while maintaining stability across different conditions and environments.
Innovation Solution
A novel maize variety, PHPKH, is developed through careful breeding and selection, incorporating traits like male sterility, herbicide tolerance, and resistance to diseases and insects, achieved through backcross conversion, genetic manipulation, and transformation, allowing for the creation of stable, high-yielding hybrids with improved agronomic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then the resulting varieties have improved agronomic characteristics, but the development process takes 6-12 years and requires extensive resources
Solution Approach 1:
The patent employs preliminary action through the use of male-sterile lines and predetermined breeding schemes. By pre-establishing male-sterile inbred lines (such as CMS lines) and planned backcrossing programs, the breeding process eliminates the need for manual emasculation and enables systematic trait incorporation. This preliminary preparation of genetic materials and breeding protocols significantly accelerates the breeding cycle while maintaining reliability of trait combination.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the agronomic performance and yield are improved, but the breeding process becomes more complex and requires precise planning
Solution Approach 1:
The patent applies segmentation by dividing the breeding process into distinct modular stages: (1) development of male-sterile lines, (2) backcrossing to introduce specific traits, (3) selfing to fix traits, and (4) hybridization for final variety production. Each stage has specific objectives and can be independently managed. This modular segmentation allows complex multi-trait combinations to be achieved through systematic, stepwise procedures rather than attempting to combine all traits simultaneously, thereby managing breeding process complexity.
3Productivity
If backcrossing and genetic manipulation techniques are used to introgress traits, then the breeding efficiency is improved and time is reduced, but the process requires sophisticated technical expertise and resources
Solution Approach 1:
The patent employs self-service mechanisms through the use of male-sterile lines that automatically prevent self-pollination and ensure cross-pollination occurs. The male-sterile trait itself serves the breeding program by eliminating the need for manual emasculation operations. Additionally, the restored-fertility lines automatically restore pollen production when crossed with maintainer lines, enabling self-contained breeding cycles that reduce dependency on complex external interventions and specialized equipment.
Data Source
AI summary
A novel maize variety designated PHPKH and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PHPKH with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHPKH 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 PHPKH or a locus conversion of PHPKH with another maize variety.