Maize Inbred PH4H09 Accelerates Hybrid Development
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, typically taking six to twelve years from the initial cross to the delivery of finished seed to farmers, due to the complexity of combining desirable traits such as disease resistance, drought tolerance, and high yield.
Innovation Solution
The introduction of the novel maize variety PH4H09, which can be used to produce seeds and plants with specific traits through processes such as backcross conversion, genetic manipulation, and transformation, allowing for the rapid development of stable, high-yielding maize varieties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then the variety achieves stability and high yield, but the development time becomes excessively long (6-12 years)
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred line PH4H09 with desirable traits (disease resistance, drought tolerance, yield potential) before hybrid development. This advance preparation of parental material with known characteristics accelerates the breeding process while ensuring variety stability, as the inbred line is already optimized for multiple traits before being used in hybrid crosses
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the variety achieves high adaptability and yield, but the breeding process complexity increases significantly
Solution Approach 1:
The patent applies segmentation by dividing the complex trait combination process into distinct stages: first developing and characterizing inbred line PH4H09 with specific traits (disease resistance, drought tolerance), then using this pre-characterized line as a parent in hybrid crosses. This segmentation of the breeding process into modular steps (inbred development → hybrid crossing → variety registration) reduces overall complexity while achieving multi-trait combinations
3Reliability
If conventional breeding methods are used to develop new varieties, then the varieties achieve agronomic soundness, but the productivity of the breeding program remains low
Solution Approach 1:
The patent applies parameter changes by systematically evaluating and selecting inbred line PH4H09 based on specific measurable parameters (disease resistance levels, drought tolerance metrics, yield components, maturity timing). This parameter-based selection approach in the inbred development stage enables more efficient identification of superior parental lines, increasing breeding program productivity while maintaining agronomic soundness through rigorous parameter evaluation
Data Source
AI summary
A novel maize variety designated PH4H09 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH4H09 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH4H09 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 PH4H09 or a locus conversion of PH4H09 with another maize variety.