Maize Variety PH18JB Backcross Conversion for Trait Integration
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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
The development of a novel maize variety, PH18JB, which is homozygous and combines desirable traits through a process involving backcross conversion and transformation, allowing for the introduction of specific genetic material to enhance traits like drought resistance, disease resistance, and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding methods are used to combine desirable traits, then disease resistance and drought tolerance can be achieved, but the time required for breeding and the complexity of the breeding process increase
Solution Approach 1:
The patent employs preliminary action by using backcross conversion to pre-introduce desired traits (disease resistance, drought tolerance) into the PH18JB variety before hybridization. This allows the inbred variety to be pre-prepared with multiple desirable traits already integrated, reducing the time required for subsequent breeding steps while ensuring reliable trait expression in the final hybrid.
2Reliability
If traditional plant breeding methods are used to combine desirable traits, then disease resistance and drought tolerance can be achieved, but the uniformity of plant characteristics decreases
Solution Approach 1:
The patent applies local quality by using backcross conversion to introduce specific desired traits (disease resistance, drought tolerance) into specific genomic locations within the PH18JB variety. This allows for precise integration of beneficial traits while maintaining the uniformity and consistency of the overall inbred variety genome, ensuring that plant characteristics remain uniform across the population.
3Manufacturing precision
If backcross conversion and transformation are used to introduce specific genetic material, then trait precision and uniformity improve, but the manufacturing complexity increases
Solution Approach 1:
The patent uses backcross conversion as an intermediary process between traditional breeding and genetic transformation. This intermediary approach allows for the precise introduction of desired traits through controlled backcrossing with selection, achieving trait precision similar to transformation but using conventional breeding tools. The process mediates between the need for precision and the complexity by providing a systematic, multi-generational approach to trait integration.
4Productivity
If inbred varieties with multiple desirable traits are developed, then hybrid yield and stress resistance improve, but the difficulty of variety development increases
Solution Approach 1:
The patent applies segmentation by dividing the variety development process into distinct phases: first developing the base PH18JB inbred variety with core desirable traits through backcross conversion, then using this standardized inbred as a parent for multiple hybrid combinations. This segmentation allows the complex task of creating high-yielding, stress-resistant hybrids to be broken into manageable steps, reducing overall development difficulty while maintaining high productivity outcomes.
Data Source
AI summary
A novel maize variety designated PH18JB and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH18JB with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH18JB 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 PH18JB or a locus conversion of PH18JB with another maize variety.