Maize Inbred PH1DDV Breeding for Stress Resistance and Uniformity
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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 a novel maize variety, PH1DDV, through specific breeding processes that include crossing, backcrossing, and transformation to introduce desired traits, ensuring genetic stability and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional plant breeding methods are used to combine desirable traits, then the breeding process can proceed with conventional techniques, but the ability to simultaneously achieve disease resistance, drought tolerance, and uniformity is limited
Solution Approach 1:
The patent segments the breeding process into distinct phases: initial crossing to introduce disease resistance, followed by backcrossing to restore the recurrent parent genome while retaining desired traits, and final selection for uniformity. This segmentation allows each trait to be addressed systematically without compromising other desirable characteristics.
Solution Approach 2:
The patent applies preliminary action by performing multiple backcrosses before final selection, ensuring that the recurrent parent's desirable traits (including drought tolerance) are restored before selecting for uniformity and disease resistance. This preliminary restoration of the genetic background prevents loss of drought tolerance during the breeding process.
2Productivity
If traditional breeding methods are used, then the process can maintain simplicity, but the uniformity of plant characteristics required for mechanical harvesting is insufficient
Solution Approach 1:
The patent employs feedback mechanisms through repeated cycles of crossing, backcrossing, and selection. Each cycle provides feedback on the degree of uniformity achieved, allowing the breeder to continue the process until the desired level of uniformity for mechanical harvesting is obtained. Molecular markers may be used to provide quantitative feedback on genetic uniformity.
Solution Approach 2:
The patent changes the parameter of genetic uniformity through controlled breeding operations. By adjusting the number of backcross generations and selection intensity, the breeder can control the degree of uniformity achieved, balancing it against the increased process complexity required to attain that uniformity.
3Reliability
If multiple desirable traits are combined through breeding, then the overall performance improves, but the time required to develop the new variety increases
Solution Approach 1:
The patent uses preliminary action by pre-establishing the recurrent parent's genetic background through multiple backcrosses before introducing and selecting for multiple desirable traits. This preliminary restoration of the genetic background reduces the time required for subsequent selection cycles, as the foundation for uniformity and performance is already in place.
Solution Approach 2:
The patent merges multiple breeding objectives into a unified breeding scheme. Disease resistance, drought tolerance, and uniformity are addressed simultaneously through an integrated approach of crossing, backcrossing, and selection, rather than through separate sequential programs. This merging reduces the total time required compared to developing each trait independently.
Data Source
AI summary
A novel maize variety designated PH1DDV and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH1DDV with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH1DDV 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 PH1DDV or a locus conversion of PH1DDV with another maize variety.