Maize Inbred PH2DNB Accelerates Hybrid Development
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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 create stable, high-yielding varieties with desirable traits such as disease resistance, drought tolerance, and improved agronomic characteristics, but existing methods are slow and prone to directional changes.
Innovation Solution
A novel maize variety, PH2DNB, is developed through careful breeding and selection, incorporating traits like male sterility, herbicide tolerance, and disease resistance via backcross conversion and genetic transformation, allowing for efficient introgression of desired genes and stable hybrid production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to develop new varieties with desirable traits, then genetic stability and hybrid vigor are maintained, but the development process is time-consuming and requires extensive resources
Solution Approach 1:
The patent applies preliminary action by developing and maintaining a pre-characterized inbred maize line (PH2DNB) with a comprehensive set of desirable traits including disease resistance, drought tolerance, and improved agronomic characteristics. This pre-developed genetic platform allows breeders to immediately cross with target varieties without undergoing lengthy breeding cycles, thus reducing development time while maintaining genetic stability through the use of a well-characterized, homozygous inbred line
2Stability of the object's composition
If traditional breeding methods are used to combine multiple desirable traits in a single variety, then trait stability is achieved, but the process requires multiple generations and extensive field testing
Solution Approach 1:
The inbred line PH2DNB has been pre-developed through multiple generations of breeding and selection to combine multiple desirable traits including resistance to diseases (gray leaf spot, northern leaf blight, common rust), tolerance to abiotic stresses (drought, heat), and improved agronomic characteristics (yield, stalk strength, root lodging resistance). This pre-combined genetic package eliminates the need for repeated multi-generational breeding cycles to achieve the same trait组合, thereby maintaining trait stability while dramatically improving breeding efficiency
Solution Approach 2:
The patent enables copying of the proven PH2DNB genetic platform into new hybrid varieties through controlled crossing. The established trait combination in PH2DNB can be replicated across multiple hybrid progenies, ensuring consistent trait stability and performance without requiring re-breeding. This copying approach allows rapid multiplication of successful trait combinations across different varieties
3Reliability
If conventional variety development processes are followed, then comprehensive trait evaluation is possible, but resource requirements and program complexity increase
Solution Approach 1:
The inbred line PH2DNB serves as a universal genetic platform that can be crossed with multiple different target varieties to create various hybrid combinations. Its comprehensive trait profile (disease resistance, stress tolerance, yield potential) makes it a multi-functional parent that can address multiple breeding objectives simultaneously. This universality reduces program complexity by eliminating the need to develop separate breeding programs for different trait combinations, as PH2DNB can be used as a common parent across multiple hybrid development projects
Data Source
AI summary
A novel maize variety designated PH2DNB and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2DNB with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2DNB 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 PH2DNB or a locus conversion of PH2DNB with another maize variety.