Maize Inbred PH473G Backcross Trait Introgression
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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 PH473G, which can be crossed with other maize plants to introduce desired traits through backcross conversion, genetic manipulation, and transformation, including cytoplasmic or nuclear factors for male sterility, and the use of specific genetic loci for traits like herbicide tolerance and disease resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then stable and agronomically sound varieties are achieved, but the development time is excessively long (six to twelve years)
Solution Approach 1:
The patent creates a preliminary inbred line PH473G with a stable genetic background and desirable agronomic traits before introducing additional traits through backcrossing. This preliminary preparation reduces the overall development time by having the foundation genetics ready in advance, rather than developing all traits simultaneously through lengthy traditional breeding processes.
Solution Approach 2:
The breeding process is segmented into distinct phases: first establishing inbred line PH473G with core desirable traits, then separately introducing additional traits through backcrossing with selected donor parents. This segmentation allows parallel development of different trait combinations and reduces the sequential time required in traditional breeding.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety through traditional breeding, then agronomic soundness is achieved, but the process complexity and time requirements increase significantly
Solution Approach 1:
The inbred line PH473G serves as a universal platform that can be backcrossed with multiple different donor parents to introduce various desirable traits (disease resistance, insect resistance, abiotic stress tolerance, yield improvement). This multi-functional approach allows the same genetic background to be used for developing multiple different hybrid varieties with different trait combinations, reducing overall breeding complexity.
Solution Approach 2:
The patent uses backcrossing as an intermediary method to transfer specific desirable traits from donor parents to the PH473G background. This intermediary approach allows selective introduction of individual traits or trait combinations without having to manage the complexity of simultaneous multi-trait breeding, simplifying the overall process.
3Productivity
If new traits are introduced through backcrossing and genetic manipulation, then trait introduction speed is improved, but the genetic stability may be compromised
Solution Approach 1:
The patent performs preliminary stabilization by creating inbred line PH473G through multiple generations of selfing and selection before introducing new traits. This preliminary action ensures a stable, homozygous genetic background that will maintain consistency after backcrossing, reducing genetic instability risks while allowing faster trait introduction.
Solution Approach 2:
The patent employs molecular marker-assisted selection during the backcrossing process to monitor and ensure the recovery of the PH473G genetic background while tracking the introduction of desired traits. This feedback mechanism allows real-time verification of genetic composition, maintaining genetic stability while accelerating trait introduction through precise selection.
Data Source
AI summary
A novel maize variety designated PH473G and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH473G with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH473G 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 PH473G or a locus conversion of PH473G with another maize variety.