Maize Inbred PH490J Backcross Trait Integration
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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 stable and agronomically sound manner.
Innovation Solution
The introduction of the novel maize variety PH490J, which involves crossing with other maize plants to introduce desirable traits through backcross conversion, genetic manipulation, and transformation, including cytoplasmic or nuclear factors for male sterility and herbicide tolerance, insect resistance, and other beneficial characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to combine desirable traits, then trait stability and agronomic soundness are improved, but the development time increases to six to twelve years
Solution Approach 1:
The patent employs preliminary action by using backcross conversion to pre-establish the PH490J inbred line with desired traits before hybrid development. This preparatory work consolidates disease resistance, drought tolerance, and yield traits into a stable genetic background, reducing the time needed for subsequent hybrid testing and validation while ensuring trait stability is achieved from the outset
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then agronomic performance and yield stability are improved, but the breeding process complexity increases
Solution Approach 1:
The patent applies merging by combining multiple desirable traits including disease resistance, drought tolerance, and high yield potential into the single PH490J inbred line through systematic backcrossing. This consolidation of traits into one parental line simplifies the overall breeding architecture, as the combined trait package can be reliably transmitted to hybrids without managing separate breeding programs for each trait
Solution Approach 2:
The patent uses backcross conversion as an intermediary process to bridge between donor parent traits and the recurrent parent background. This intermediary approach allows gradual integration of multiple traits while maintaining the desired agronomic performance, avoiding the complexity of simultaneous multi-trait introgression
3Reliability
If conventional variety development processes are followed, then trait integration is achieved, but the time from first cross to seed delivery extends to six to twelve years
Solution Approach 1:
The patent implements preliminary action by completing the trait integration work in advance through backcross conversion to establish PH490J as a ready-to-use inbred line. This preliminary trait integration eliminates the need for lengthy subsequent breeding cycles, allowing immediate deployment in hybrid development and significantly improving breeding efficiency from six to twelve years to a much shorter timeline
Data Source
AI summary
A novel maize variety designated PH490J and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH490J with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH490J 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 PH490J or a locus conversion of PH490J with another maize variety.