Maize Inbred PH2SSR Trait Introgression via Segmentation
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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 PH2SSR, which involves crossing with another maize plant to introduce desired traits through backcross conversion, genetic manipulation, and transformation, including cytoplasmic or nuclear factors for male sterility, and the use of regenerable tissue cultures to produce plants with specific physiological and morphological characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to develop new maize varieties, then the varieties can be stable and agronomically sound, but the development process takes six to twelve years
Solution Approach 1:
The patent applies preliminary action by using pre-developed inbred lines with known genetic markers and desirable traits as starting material. The inbred lines are prepared and characterized before the actual variety development, allowing the breeding process to start from a advanced stage rather than from scratch, thereby reducing the overall development time while maintaining stability.
Solution Approach 2:
The patent utilizes copying by creating inbred lines that are genetically replicated and standardized. These inbred lines serve as reusable building blocks that can be combined in different ways to develop new varieties. The inbred lines are maintained as stable, replicated genetic copies that preserve desirable traits across generations, enabling rapid variety development without time-consuming re-breeding.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the variety becomes more versatile and high-yielding, but the complexity of achieving and maintaining these traits increases
Solution Approach 1:
The patent applies segmentation by dividing the complex trait combination into separate inbred lines, each carrying specific desirable traits. Instead of trying to combine all traits in a single complex breeding program, the traits are segmented into different inbred lines (e.g., one line for disease resistance, another for yield, another for stress tolerance). These segmented lines are then combined through controlled crosses, simplifying the overall complexity while maintaining versatility.
Solution Approach 2:
The patent uses merging by combining multiple inbred lines with different desirable traits through controlled crossing. The inbred lines are merged in a systematic way to create hybrid varieties that inherit the beneficial traits from each parent line. This merging approach allows multiple traits to be combined in a single variety while maintaining manageable complexity through the use of pre-characterized inbred lines.
3Stability of the object's composition
If inbred lines are used as starting material, then the genetic background is uniform and stable, but the initial genetic diversity is reduced
Solution Approach 1:
The patent applies universality by developing a set of inbred lines that serve multiple functions. Each inbred line is designed to carry and stabilize specific desirable traits, and these lines can be universally used as starting material for developing different varieties. The inbred lines are created to be multi-functional building blocks that can be combined in various ways to generate diversity while maintaining the stability of each individual line.
Solution Approach 2:
The patent uses composite materials by creating inbred lines that are composite genetic structures. Each inbred line combines multiple stable genetic elements and desirable traits into a unified, homogeneous genetic background. These composite inbred lines then serve as the foundation for creating diverse varieties through crossing, effectively combining the stability of uniform genetics with the versatility of trait combination.
Data Source
AI summary
A novel maize variety designated PH2SSR and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2SSR with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2SSR 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 PH2SSR or a locus conversion of PH2SSR with another maize variety.