Maize Inbred PH2RDP 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, requiring six to twelve years from the first cross to delivering finished seed to farmers, 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
A novel maize variety, PH2RDP, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and drought tolerance via backcross conversion and genetic transformation, allowing for the creation of stable, high-yielding hybrids with improved agronomic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to develop new maize varieties, then the variety can be stabilized and made agronomically sound, but the development time becomes excessively long (6-12 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 genetically stable lines accelerates the subsequent breeding process while maintaining variety stability and agronomic soundness.
Solution Approach 2:
The patent uses an intermediary approach by introducing specific genetic markers and molecular tools that facilitate the breeding process. These intermediaries enable more efficient selection and combination of desirable traits, reducing the overall breeding time while maintaining reliability.
2Adaptability or versatility
If multiple desirable traits (disease resistance, drought tolerance, high yield) are combined in a single variety, then the variety becomes more versatile and productive, but the breeding complexity and time required increase significantly
Solution Approach 1:
The patent applies segmentation by developing different inbred lines, each carrying specific desirable traits (disease resistance, drought tolerance, high yield) that can be independently created and then combined through controlled crosses. This modular approach reduces overall breeding complexity while maintaining high versatility.
Solution Approach 2:
The patent creates universal inbred lines that can serve multiple functions in different breeding programs. These inbreds can be used to develop various hybrid varieties with different trait combinations, reducing the need for separate breeding programs for each trait combination.
3Stability of the object's composition
If inbred lines are created through traditional selfing methods, then genetic homogeneity is achieved, but the process requires multiple generations and results in significant genetic erosion
Solution Approach 1:
The patent replaces the mechanical biological process of repeated selfing with a technological intervention - doubled haploid technology. This substitution achieves genetic homogeneity in a single generation without the time loss and genetic erosion associated with traditional multi-generational selfing methods.
Data Source
AI summary
A novel maize variety designated PH2RDP and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2RDP with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2RDP 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 PH2RDP or a locus conversion of PH2RDP with another maize variety.