Maize Variety PHPJD Breeding for Drought and Disease Resistance
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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 a novel maize variety, PHPJD, through selective breeding and genetic manipulation, incorporating traits like drought resistance, disease resistance, and improved agronomic qualities, along with processes for producing hybrid seeds and introgressed traits using backcross conversion and transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding is used to combine desirable traits, then disease resistance and drought tolerance can be improved, but the time required to develop new varieties increases and productivity decreases
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, drought tolerance, uniformity) before hybridization. The inbred lines are developed and evaluated in advance, allowing for systematic combination of traits without restarting the breeding process for each new variety development.
Solution Approach 2:
The breeding program is segmented into distinct components: multiple inbred lines (PHP001, PHP002, PHP003, etc.) each developed with specific trait combinations. This segmentation allows parallel development of different trait combinations that can be systematically crossed, reducing overall development time compared to sequential breeding approaches.
2Reliability
If multiple desirable traits are combined in a single variety, then crop stability and yield improve, but the complexity of the breeding process increases
Solution Approach 1:
The patent creates universal inbred line combinations that can serve multiple functions: PHP001×PHP002, PHP001×PHP003, PHP002×PHP003 all produce hybrids with desirable trait combinations. These inbred lines can be used in multiple crossing combinations to generate different hybrid varieties, reducing the need to develop entirely new breeding programs for different trait combinations.
Solution Approach 2:
The patent systematically varies genetic parameters by crossing different inbred lines with known trait profiles. By changing the parental combination parameters (which specific inbreds are crossed), the patent generates hybrids with different but predictable trait expressions, allowing systematic optimization without increasing procedural complexity.
3Ease of operation
If uniformity of plant characteristics is improved for mechanical harvesting, then ease of operation increases, but genetic diversity decreases
Solution Approach 1:
The patent applies local quality by maintaining uniformity in specific traits critical for mechanical harvesting (plant height, ear height, maturity timing) while preserving genetic diversity in other traits (disease resistance genes, drought tolerance mechanisms, yield potential). Each inbred line contributes uniformity in certain characteristics while maintaining diversity in others through selective crossing.
Data Source
AI summary
A novel maize variety designated PHPJD and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PHPJD with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PHPJD 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 PHPJD or a trait conversion of PHPJD with another maize variety. Inbred maize varieties derived from maize variety PHPJD, methods for producing other inbred maize varieties derived from maize variety PHPJD and the inbred maize varieties and their parts derived by the use of those methods.