Maize Inbred PH2DPY 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 that requires precise planning and efficient resource use, aiming to combine desirable traits such as disease resistance, drought tolerance, and high yield, while maintaining stability across different conditions and environments.
Innovation Solution
The introduction of the novel maize variety PH2DPY, which involves crossing with another maize plant to introduce specific traits like male sterility, herbicide tolerance, and disease resistance through backcross conversion and genetic transformation, along with the use of cytoplasmic or nuclear factors to control self-pollination, and the production of hybrid seeds using specific cultivation methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional maize breeding processes are used to develop new varieties, then desirable traits such as disease resistance, drought tolerance, and high yield can be combined, but the process is time-consuming and requires extensive resources over six to twelve years
Solution Approach 1:
The patent applies preliminary action by using doubled haploid technology to produce homozygous lines in a single generation rather than requiring multiple generations of selfing and selection. This preliminary creation of genetically stable lines accelerates the entire breeding process while maintaining the ability to combine desirable traits through subsequent crossing programs.
Solution Approach 2:
The patent replaces traditional mechanical breeding methods (repeated manual crossing and selection over multiple generations) with biotechnological approaches including doubled haploid induction, molecular markers for selection, and controlled pollination systems. This substitution dramatically reduces the time required to develop new varieties while maintaining trait combination capabilities.
2Stability of the object's composition
If inbred maize varieties are developed through multiple generations of selfing, then genetic stability and uniformity are achieved, but the breeding process becomes complex and resource-intensive
Solution Approach 1:
The patent replaces the complex mechanical process of multiple generations of selfing and selection with a biotechnological doubled haploid system. This system induces chromosome doubling in F1 hybrids to create homozygous lines in one generation, dramatically simplifying the process while achieving the same genetic stability and uniformity.
Solution Approach 2:
The patent changes the temporal parameter of genetic stabilization from multiple generations (traditionally 4-6 generations of selfing) to a single generation through doubled haploid technology. This parameter change reduces process complexity while maintaining the desired genetic uniformity and stability.
3Adaptability or versatility
If hybrid maize seed is produced through traditional crossing methods, then genetic diversity and heterosis are achieved, but the process requires precise planning and efficient resource use over extended periods
Solution Approach 1:
The patent applies preliminary action by pre-establishing a library of doubled haploid inbred lines with diverse and desirable traits before the actual hybridization program. This preliminary diversification and stabilization of parent lines enables more efficient and targeted crossing programs, improving overall breeding productivity while maintaining heterosis.
Solution Approach 2:
The patent replaces traditional extended-time hybridization programs with an accelerated system using doubled haploids and molecular marker-assisted selection. This substitution maintains the genetic diversity and heterosis benefits while dramatically improving breeding efficiency and reducing the time required for variety development.
Data Source
AI summary
A novel maize variety designated PH2DPY and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2DPY with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2DPY 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 PH2DPY or a locus conversion of PH2DPY with another maize variety.