Maize Inbred PH18DR Trait Introgression via Backcross Conversion
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Solution Overview
Problem
Current maize breeding techniques face challenges in combining desirable traits such as disease resistance, drought tolerance, and uniformity, which are essential for efficient crop production and mechanical harvesting.
Innovation Solution
Development of the maize variety PH18DR, which is a novel inbred line with specific traits introgressed through backcross conversion and transformation, and the processes for producing hybrid maize seeds and plants using PH18DR, enabling the combination of desirable genetic material for improved agronomic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional plant breeding is used to combine desirable traits, then various desirable traits such as disease resistance, drought tolerance, and uniformity can be integrated, but the breeding process is time-consuming and complex
Solution Approach 1:
The patent applies preliminary action by pre-establishing the inbred line PH18DR with desirable traits (disease resistance, drought tolerance, uniformity) through extensive breeding work before it is needed for hybrid production. This pre-prepared inbred line can then be used immediately in hybrid crosses without requiring time-consuming breeding processes at the time of hybrid development, thus resolving the time loss issue while maintaining trait combination capability.
2Productivity
If mechanical harvesting is implemented, then crop production efficiency is improved, but uniformity of plant characteristics such as germination, stand establishment, growth rate, and maturity becomes critical
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific phenotypic parameters (germination uniformity, stand establishment, growth rate, maturity timing) in the inbred line PH18DR. By controlling these parameters to fall within specific ranges and ensuring consistent expression across the population, the patent enables mechanical harvesting efficiency while maintaining the required uniformity of plant characteristics.
3Adaptability or versatility
If backcross conversion and transformation are used to introgress traits, then desirable genetic material can be combined with PH18DR, but the process complexity increases
Solution Approach 1:
The patent applies the intermediary principle by using PH18DR as a recurrent parent in backcross conversion programs. This inbred line serves as a mediator that receives desirable traits from donor parents while maintaining its own stable genetic background. The backcross process uses PH18DR as the recurring maternal parent, simplifying the overall process by providing a consistent genetic framework for trait introgression without requiring complex multi-parent crosses.
Data Source
AI summary
A novel maize variety designated PH18DR and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH18DR with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH18DR through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the variety PH18DR or a locus conversion of PH18DR with another maize variety.