Maize Inbred 1PPUL34 Breeding via Male Sterility
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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 creating stable, high-yielding maize varieties with desirable traits such as disease resistance, drought tolerance, and improved agronomic characteristics.
Innovation Solution
A novel maize variety, 1PPUL34, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and drought tolerance, achieved through backcross conversion, genetic manipulation, and transformation, allowing for the creation of hybrid seeds with enhanced agronomic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding processes are used to develop new maize varieties, then stable and high-yielding varieties with desirable traits can be achieved, but the process takes six to twelve years which is time-consuming
Solution Approach 1:
The patent utilizes preliminary action by employing male sterility systems and cytoplasmic male sterility (CMS) to prevent self-pollination before breeding occurs. This ensures that cross-pollination is the only mode of reproduction, thereby guaranteeing hybrid vigor and stable trait inheritance from the outset of the breeding process, eliminating the need for lengthy verification periods across multiple generations.
Solution Approach 2:
The patent introduces an intermediary mechanism through the use of restorer genes that can restore fertility in male-sterile plants. This intermediary system allows breeders to control pollination precisely - using male-sterile lines as female parents to ensure cross-pollination, then introducing restorer genes to restore fertility only when needed for seed production, thereby streamlining the breeding timeline while maintaining genetic stability.
2Stability of the object's composition
If traditional breeding methods are used to combine desirable traits, then stable inheritance can be achieved, but the complexity of managing multiple breeding objectives increases
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into distinct functional components: male-sterile lines for controlled cross-pollination, restorer lines for fertility recovery, and maintainer lines for preserving male-sterility. This segmentation allows each component to be optimized independently for its specific function, simplifying the management of complex breeding objectives while ensuring stable trait inheritance through controlled mating systems.
Solution Approach 2:
The patent employs universality through the development of multi-functional breeding systems where single parental lines can serve multiple purposes. For example, certain inbred lines can function both as male-sterile females for hybrid production and as maintainers for preserving sterility in subsequent generations. This multi-functionality reduces the total number of lines required in the breeding program, thereby reducing complexity while maintaining inheritance stability.
3Ease of manufacture
If self-pollination is allowed in maize breeding, then seed production is simplified, but hybrid vigor and trait stability are compromised
Solution Approach 1:
The patent applies preliminary anti-action by implementing male sterility in the parental lines before seed production begins. This preliminary prevention of self-pollination capability ensures that cross-pollination is the only possible mode of reproduction, thereby guaranteeing hybrid vigor and trait stability in the F1 generation. The male-sterile condition acts as a pre-established barrier against self-pollination, eliminating the need for complex mechanical emasculation or isolation procedures.
Solution Approach 2:
The patent utilizes self-service through the natural self-incompatibility mechanism inherent in male-sterile plants. These plants automatically prevent self-pollination through their physiological inability to produce viable pollen or to accept self-pollen, thereby self-enforcing cross-pollination without requiring external intervention. This self-service mechanism simplifies seed production by eliminating the need for manual detasseling or physical isolation while maintaining hybrid vigor consistency.
Data Source
AI summary
A novel maize variety designated 1PPUL34 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety 1PPUL34 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into 1PPUL34 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 1PPUL34 or a locus conversion of 1PPUL34 with another maize variety.