Maize Inbred PH48JH Breeding Acceleration
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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 different conditions and environments.
Innovation Solution
The introduction of the novel maize variety PH48JH, which involves crossing with another maize plant to introduce desired traits through backcross conversion, genetic manipulation, and transformation, incorporating cytoplasmic or nuclear factors for male sterility and other desirable characteristics like disease resistance and improved metabolic traits, while using tissue culture to regenerate plants with consistent physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to combine desirable traits, then the variety achieves agronomic soundness and stability, but the development process takes six to twelve 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 combining them. The inbred PH48JH has been pre-developed with stable agronomic characteristics, allowing faster hybrid development without sacrificing reliability. This preliminary characterization of parental lines enables more efficient trait combination in subsequent crossing steps.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the variety achieves greater versatility and yield, but the breeding process becomes more complex and time-consuming
Solution Approach 1:
The patent applies segmentation by dividing the complex breeding process into distinct stages: developing individual inbred lines with specific traits, characterizing their agronomic performance, and then combining them in hybrid crosses. The inbred PH48JH represents a segmented unit with predetermined traits that can be systematically combined with other characterized inbreds, reducing overall breeding complexity while achieving versatile trait combinations.
Solution Approach 2:
The patent applies parameter changes by systematically evaluating and selecting inbred lines based on specific agronomic parameters (disease resistance levels, drought tolerance indices, yield metrics). By changing and optimizing these parameters in the parental inbreds before hybridization, the process achieves efficient trait combination without proportionally increasing complexity. The inbred PH48JH has been optimized for multiple trait parameters that can be effectively combined in hybrid production.
3Productivity
If new varieties are developed through extensive breeding programs, then the varieties achieve stable high yielding characteristics, but the time from first cross to seed delivery extends to six to twelve years
Solution Approach 1:
The patent applies copying by using well-characterized inbred lines as reusable parental units that can be repeatedly crossed to produce multiple hybrid varieties. The inbred PH48JH serves as a stable genetic copy that can be combined with different partner inbreds to create multiple high-yielding hybrids, each inheriting its desirable traits. This copying approach eliminates the need to re-develop the same beneficial traits in each new variety, significantly reducing the time from first cross to seed delivery while maintaining stable high-yielding characteristics.
Data Source
AI summary
A novel maize variety designated PH48JH and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH48JH with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH48JH 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 PH48JH or a locus conversion of PH48JH with another maize variety.