Maize Inbred PH2STM Breeding via Backcross Conversion
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, typically 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 PH2STM, which involves crossing with another maize plant to introduce traits like male sterility, herbicide tolerance, and disease resistance through backcross conversion, genetic manipulation, and transformation, along with specific breeding processes to achieve desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then the resulting varieties have stable and agronomically sound characteristics, but the development time is excessively long (6-12 years)
Solution Approach 1:
The patent applies preliminary action by pre-establishing a recurrent parent inbred line with a comprehensive foundation of desirable traits (disease resistance, drought tolerance, high yield) before initiating the backcrossing process. This preparatory step ensures that the genetic base is optimized in advance, allowing faster integration of additional traits without compromising variety stability.
Solution Approach 2:
The patent uses backcrossing as an intermediary process between the recurrent parent and donor lines. The recurrent parent serves as a genetic mediator that progressively absorbs desired traits from donor lines while maintaining its own stable genetic background, thus accelerating trait combination without losing variety stability.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the variety becomes more versatile and adaptable, but the breeding process becomes more complex and time-consuming
Solution Approach 1:
The patent creates a universal recurrent parent inbred line that performs multiple functions: it provides high yield, disease resistance, drought tolerance, and serves as the genetic background for integrating additional traits. This multi-functional foundation reduces the need for separate breeding programs for different traits, simplifying the overall process while enhancing versatility.
Solution Approach 2:
The patent maintains continuity of useful action through repeated backcrossing cycles where the recurrent parent continuously contributes its desirable traits while new traits are progressively introduced. This continuous process ensures that adaptability is enhanced without requiring complex interruptive breeding operations.
3Stability of the object's composition
If traditional breeding methods are used to introduce new traits, then the traits are stably integrated, but the time required for trait introgression is excessively long
Solution Approach 1:
The patent employs backcrossing as a genetic intermediary mechanism that efficiently transfers specific traits from donor lines to the recurrent parent. Each backcross cycle acts as an intermediary step that progressively increases the proportion of recurrent parent genetics while retaining the introduced trait, achieving stable integration in fewer generations than traditional methods.
Solution Approach 2:
The patent uses molecular markers to copy and track specific genetic loci during the backcrossing process. This allows precise identification and selection of plants that have successfully integrated the desired trait while maintaining the recurrent parent's stable genetic background, significantly reducing the time required for trait introgression.
Data Source
AI summary
A novel maize variety designated PH2STM and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2STM with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2STM 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 PH2STM or a locus conversion of PH2STM with another maize variety.