Maize Inbred PH47SK Breeding via Male Sterility and 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 single variety that is agronomically sound across various conditions and environments.
Innovation Solution
A novel maize variety, PH47SK, 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 stable, high-yielding hybrids with specific desirable characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to develop new maize varieties, then desirable traits such as disease resistance and drought tolerance can be combined, but the development process takes six to twelve years
Solution Approach 1:
The patent employs preliminary action by using male sterile lines and predetermined breeding designs before the actual hybridization process. The male sterile trait is introduced in advance to control pollination, and the breeding program is structured with pre-selected parental lines that possess desired traits, thereby streamlining the development process and reducing time while maintaining reliability of trait combination
Solution Approach 2:
The patent uses male sterile lines as intermediaries to facilitate controlled crossing between parental lines. The male sterility trait acts as a mediator that prevents self-pollination and ensures cross-pollination occurs only between intended parents, enabling efficient combination of desirable traits without the time-consuming process of manual emasculation and pollination control
2Adaptability or versatility
If multiple desirable traits are combined in a single maize variety, then the variety becomes more versatile and agronomically sound, but the breeding process becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the breeding process into distinct components: male sterile lines, maintainer lines, and restorer lines. Each component serves a specific function in the breeding program. The male sterile line carries the sterility trait and desired agronomic traits, the maintainer line preserves the sterility trait, and the restorer line restores fertility in the final hybrid. This segmentation simplifies the management of complex multi-trait combinations by organizing them into functional modules
3Productivity
If male sterility is introduced to prevent self-pollination and facilitate hybrid production, then hybrid seed production becomes more efficient, but the variety requires additional genetic factors
Solution Approach 1:
The patent merges the male sterility trait with desirable agronomic traits in the same male sterile line. Instead of treating male sterility as a separate, standalone genetic factor, the breeding program combines it with traits for disease resistance, drought tolerance, and high yield potential. This merging reduces the overall genetic complexity by integrating multiple functions into a single parental line, thereby improving hybrid seed production efficiency without proportionally increasing genetic factor requirements
Data Source
AI summary
A novel maize variety designated PH47SK and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH47SK with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH47SK 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 PH47SK or a locus conversion of PH47SK with another maize variety.