Maize Inbred PH2SMS Breeding via Doubled Haploid Technology
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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 from the first cross to delivering finished seed to farmers, and existing technologies face challenges in creating stable, high-yielding varieties with desirable traits such as disease resistance, drought tolerance, and improved agronomic characteristics.
Innovation Solution
A novel maize variety, PH2SMS, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and drought tolerance via 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 methods are used to develop new maize varieties, then stable and high-yielding varieties can be obtained, but the development process takes six to twelve years
Solution Approach 1:
The patent applies preliminary action by using doubled haploid technology to create inbred lines in a single generation rather than requiring multiple generations of selfing. This preliminary creation of homozygous lines accelerates the breeding process while maintaining the stability that would otherwise require six to twelve years to achieve through traditional sequential selection and selfing methods.
Solution Approach 2:
The patent changes the temporal parameter of breedings by using backcross conversion and genetic manipulation techniques that can introduce desirable traits in fewer generations. The method transforms the traditional multi-year sequential breeding process into a more condensed timeline by utilizing modern genetic tools while preserving variety stability.
2Productivity
If multiple desirable traits are combined in a single variety, then agronomic performance improves, but the breeding complexity increases
Solution Approach 1:
The patent merges multiple desirable traits into a single variety by using backcross conversion technology. This allows the integration of traits such as disease resistance, drought tolerance, and yield improvement into one unified genetic background more efficiently than traditional separate breeding approaches, thereby reducing overall breeding complexity while enhancing productivity.
Solution Approach 2:
The patent uses an intermediary approach through controlled backcrossing between inbred lines with different desirable traits. This intermediary process allows for the systematic combination of multiple traits in a structured manner, making the breeding of complex multi-trait varieties more manageable and less complex than attempting to combine all traits simultaneously in traditional breeding.
3Stability of the object's composition
If inbred lines are developed through traditional selfing, then homozygosity is achieved, but the process requires multiple generations and time
Solution Approach 1:
The patent applies preliminary action by using doubled haploid technology to directly produce homozygous inbred lines in a single generation. This eliminates the need for multiple generations of selfing that would traditionally be required to achieve homozygosity, thereby reducing time loss while maintaining the compositional stability and homozygosity of inbred lines.
Data Source
AI summary
A novel maize variety designated PH2SMS and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2SMS with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2SMS 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 PH2SMS or a locus conversion of PH2SMS with another maize variety.