Maize Inbred PH41DJ Breeding Acceleration via Preliminary Action
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Solution Overview
Problem
The development of new maize varieties is a time-consuming process that takes six to twelve years, and there is a continuous need for stable, high-yielding maize varieties with improved traits such as disease resistance, drought tolerance, and better agronomic characteristics.
Innovation Solution
A novel maize variety, PH41DJ, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and improved agronomic characteristics, using techniques such as backcross conversion, genetic manipulation, and transformation, allowing for the creation of hybrid maize seeds with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to develop new varieties with desirable traits, then the varieties achieve 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 lines with specific desirable traits (disease resistance, drought tolerance, yield potential) before hybridization. The inbred line PH41DJ was developed through systematic selection and testing of parental lines, with their breeding values and general combining ability predetermined through multi-environment trials. This preliminary characterization allows breeders to make informed crossing decisions and accelerates the overall breeding process while maintaining reliability.
2Adaptability or versatility
If multiple desirable traits are combined in a single maize variety through extensive breeding, then the variety achieves superior performance, but the breeding process complexity increases significantly
Solution Approach 1:
The patent applies segmentation by dividing the complex breeding process into distinct stages: (1) development and characterization of individual inbred lines with specific traits, (2) evaluation of general combining ability through test crosses, (3) selection of optimal parental combinations, and (4) hybrid seed production. The inbred line PH41DJ represents a segmented approach where specific traits (disease resistance, drought tolerance, yield) were independently selected and combined in a systematic manner, reducing overall program complexity.
Solution Approach 2:
The patent applies universality by developing inbred line PH41DJ with multiple desirable traits that make it universally applicable as a parental line across different breeding programs and environmental conditions. The line exhibits broad adaptability with disease resistance, drought tolerance, and high yield potential, allowing it to serve as a versatile parent in various hybrid combinations and geographic regions, thereby simplifying breeding programs that require multi-trait incorporation.
3Productivity
If maize breeders focus on maximizing yield across different environments, then yield stability improves, but other important traits like disease resistance and drought tolerance may be compromised
Solution Approach 1:
The patent applies local quality by ensuring that the inbred line PH41DJ possesses specific localized traits (disease resistance, drought tolerance) in addition to high yield potential. Rather than selecting for yield alone, the breeding process incorporated specific quality attributes at particular loci while maintaining overall yield performance. This allows different regions of the genome to contribute different functions, with certain chromosomes or chromosomal regions contributing disease resistance while others contribute yield potential.
Data Source
AI summary
A novel maize variety designated PH41DJ and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH41DJ with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH41DJ 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 PH41DJ or a locus conversion of PH41DJ with another maize variety.