Maize Inbred PH1D1W Trait Introgression via Segmentation
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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 yield improvement.
Innovation Solution
Development of the maize variety PH1D1W, which is a novel inbred line with specific traits introgressed through backcross conversion and transformation, allowing for the creation of hybrid seeds and plants with enhanced resistance to various stresses and improved agronomic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional plant breeding is used, then basic crop production is maintained, but desirable traits such as disease resistance, drought tolerance, and uniformity are difficult to combine in a single variety
Solution Approach 1:
The breeding process is divided into distinct phases: initial cross between PHH9H and PHHHN to create F1, followed by selfing and selection through F2-F9 generations. This segmentation allows systematic combination of specific traits (disease resistance, drought tolerance, uniformity) while managing the complexity through structured generations.
Solution Approach 2:
The patent performs preliminary actions by first creating the F1 hybrid from PHH9H and PHHHN, then systematically selfing and selecting through multiple generations before finalizing PH1D1W. This preliminary structured approach enables the combination of multiple desirable traits that would be difficult to achieve through random traditional breeding.
2Productivity
If mechanical harvesting is implemented, then harvesting efficiency is improved, but uniformity of plant characteristics such as germination, stand establishment, growth rate, and maturity becomes critical and difficult to maintain
Solution Approach 1:
The patent focuses on changing and controlling key growth parameters through selective breeding: germination timing, stand establishment uniformity, growth rate, and maturity date. By stabilizing these parameters through multiple generations of selfing and selection, the variety PH1D1W achieves uniformity suitable for mechanical harvesting while maintaining high productivity.
3Reliability
If backcross conversion and transformation are used, then resistance to diseases, drought, and insect pests is improved, but the breeding process becomes more complex
Solution Approach 1:
The patent uses backcross conversion as an intermediary method to introduce resistance traits into the PH1D1W background. This involves crossing with lines carrying desired resistance traits, selecting progeny with those traits, and repeatedly backcrossing to the PH1D1W parent. This intermediary approach systematically achieves multiple resistances (disease, drought, insect) while managing process complexity through structured iterations.
Data Source
AI summary
A novel maize variety designated PH1D1W and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH1D1W with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH1D1W 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 PH1D1W or a locus conversion of PH1D1W with another maize variety.