Maize Inbred Line Crossing for Faster Stable Hybrid Development
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Solution Overview
Problem
The development of new maize varieties is a time-consuming process that requires years to combine desirable traits such as disease resistance, drought tolerance, and high yield, posing challenges in efficiently producing stable and agronomically sound maize varieties.
Innovation Solution
The introduction of the novel maize variety 1PWRR07, which can be bred through backcross conversion, genetic manipulation, and transformation, incorporating traits like male sterility, herbicide tolerance, and disease resistance, along with processes for crossing and hybrid seed production to enhance genetic diversity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize variety development processes are used to combine desirable traits, then stable and agronomically sound maize varieties are achieved, but the process takes six to twelve years which is time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-establishing inbred lines with specific desirable traits (disease resistance, drought tolerance, high yield) before the final hybridization step. This allows breeders to have ready-to-use parental lines that will produce consistent, stable hybrids, reducing the overall breeding time while maintaining reliability.
Solution Approach 2:
The breeding process is segmented into distinct phases: developing inbred lines with specific traits, maintaining those lines separately, and then combining them through controlled crossing. This segmentation allows parallel development of multiple trait combinations and accelerates the overall breeding program while ensuring each component's stability.
2Adaptability or versatility
If multiple desirable traits are combined in a single maize variety, then agronomic performance is improved, but the breeding process complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific desirable traits to different inbred parental lines (e.g., one parent with disease resistance, another with high yield). This allows each parent to be optimized for particular traits, and the hybrid inherits a combination of these specialized qualities, improving overall agronomic performance while managing breeding complexity through focused trait development.
Solution Approach 2:
The patent creates maize hybrids that serve multiple functions simultaneously - providing disease resistance, drought tolerance, and high yield in a single variety. This multi-functionality is achieved by combining multiple inbred lines, each contributing specific traits, resulting in a universal solution that addresses multiple agronomic challenges.
3Stability of the object's composition
If traditional breeding methods are used to develop new maize varieties, then genetic stability is maintained, but productivity in terms of variety development rate is low
Solution Approach 1:
The patent uses inbred lines as stable genetic copies that can be repeatedly crossed to produce consistent hybrids. These inbred parental lines serve as reusable genetic templates that maintain stability across multiple breeding cycles, allowing rapid development of new variety combinations without sacrificing genetic consistency.
Solution Approach 2:
The patent maintains continuous breeding programs where inbred lines are perpetually maintained and repeatedly used in crossing programs. This continuity allows for steady, rapid production of new hybrid varieties while preserving genetic stability through the consistent use of proven parental lines across generations.
Data Source
AI summary
A novel maize variety designated 1PWRR07 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety 1PWRR07 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into 1PWRR07 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 1PWRR07 or a locus conversion of 1PWRR07 with another maize variety.