Maize Inbred PHPPE Drought and Disease Resistance
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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 a novel maize variety, PHPPE, through selective breeding and genetic manipulation, incorporating traits like drought resistance, disease resistance, and improved agronomic qualities, along with processes for producing hybrid seeds and plants with introgressed traits via backcross conversion and transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding is used to combine desirable traits, then disease resistance and drought tolerance can be improved, but the time required to develop new varieties and the complexity of the breeding process increase
Solution Approach 1:
The patent applies preliminary action by developing inbred line PHPPE with pre-established desirable traits including disease resistance, drought tolerance, and uniformity characteristics before hybridization. The inbred line was developed through multiple generations of selective breeding and screening to pre-combine resistance genes for diseases such as gray leaf spot, northern leaf blight, and stalk rot, along with drought tolerance traits. This preliminary preparation of a genetically optimized base line accelerates subsequent hybrid development and reduces the time required to create new varieties with these desirable traits.
2Manufacturing precision
If traditional plant breeding is used to combine desirable traits, then agronomic quality can be improved, but the uniformity of plant characteristics required for mechanical harvesting is difficult to achieve
Solution Approach 1:
The patent applies parameter changes by systematically selecting and fixing specific phenotypic parameters in inbred line PHPPE to achieve uniformity required for mechanical harvesting. Key parameters standardized include plant height (60-80 inches), ear height (30-40 inches), maturity timing, and row configuration. The inbred line was developed through rigorous selection for uniform expression of these parameters across all plants, ensuring consistent stand establishment, growth rate, and maturity. This standardization of critical parameters enables reliable mechanical harvesting while maintaining high agronomic quality.
3Adaptability or versatility
If backcross conversion and transformation are used to introgress traits, then desired traits can be incorporated more efficiently, but the complexity of the genetic manipulation process increases
Solution Approach 1:
The patent applies the intermediary principle by using inbred line PHPPE as a standardized mediator platform for introducing desired traits through backcross conversion. The inbred line serves as a genetically stable recipient with well-characterized traits and uniform background, facilitating systematic introgression of additional desirable traits from other sources. This intermediary platform approach allows for controlled, stepwise incorporation of new traits while maintaining the core desirable characteristics of PHPPE, making the genetic manipulation process more manageable and efficient compared to direct breeding approaches.
Data Source
AI summary
A novel maize variety designated PHPPE and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PHPPE with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHPPE 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 PHPPE or a locus conversion of PHPPE with another maize variety.