Maize Inbred PH42P9 Breeding for Disease and Drought Resistance
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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, and existing technologies face challenges in combining desirable traits such as disease resistance, drought tolerance, and high yield in a single variety that is agronomically sound across various conditions and environments.
Innovation Solution
A novel maize variety, PH42P9, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and drought tolerance, 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 disease resistance, drought tolerance, and high yield can be achieved, but the development process takes six to twelve years
Solution Approach 1:
The patent employs preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, drought tolerance, yield potential) before combining them. The inbred PH42P9 was developed through preliminary breeding and selection to possess multiple desirable traits simultaneously, reducing the time needed for subsequent hybrid development and trait combination.
2Productivity
If multiple desirable traits are combined in a single maize variety, then agronomic soundness and yield are improved, but the breeding process complexity increases
Solution Approach 1:
The patent applies merging by combining multiple desirable traits (disease resistance, drought tolerance, high yield) into a single inbred variety PH42P9. This consolidated inbred line can then be used in hybrid combinations to achieve high productivity without requiring complex multi-step breeding processes for each individual trait.
Solution Approach 2:
The inbred variety PH42P9 serves multiple functions simultaneously: it provides disease resistance, drought tolerance, and high yield potential. This multi-functional inbred can be used as a parent in various hybrid combinations across different environmental conditions, reducing the need for separate breeding programs for different traits.
3Adaptability or versatility
If stable high-yielding maize hybrids are developed for multiple environments, then adaptability is improved, but the time required for testing and validation increases
Solution Approach 1:
The patent applies preliminary action by pre-testing and characterizing the inbred PH42P9 and its hybrid combinations across multiple environments before final variety release. The inbred was evaluated for its performance and stability under different environmental conditions, allowing for faster validation of its adaptability without requiring extensive multi-year testing of each hybrid combination.
Data Source
AI summary
A novel maize variety designated PH42P9 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH42P9 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH42P9 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 PH42P9 or a locus conversion of PH42P9 with another maize variety.