Maize Inbred PH25JS Breeding for Disease 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, PH25JS, through specific breeding processes that include crossing, backcrossing, and transformation to introduce desired traits, resulting in a hybrid with improved resistance to various stresses and agronomic qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding is used to combine desirable traits, then resistance to diseases and insects, resistance to heat and drought, reducing the time to crop maturity, greater yield, and better agronomic quality can be achieved, but uniformity of plant characteristics such as germination, stand establishment, growth rate, maturity, plant height and ear height may be compromised
Solution Approach 1:
The patent applies parameter changes by modifying specific genetic parameters through controlled crossing and backcrossing operations. The inbred line PH25JS was developed by crossing PHJ3C and PHP5K, then performing multiple backcrosses to PHJ3C while selecting for desired traits. This systematic parameter modification in the genetic composition enabled the integration of disease resistance, drought tolerance, and uniformity characteristics into a single stable inbred line.
Solution Approach 2:
The patent employs preliminary action through the development of the inbred line PH25JS before use in hybrid production. The inbred line was thoroughly characterized and selected for uniformity and stress resistance in advance, creating a stable genetic foundation that ensures consistent performance when used in hybrid crosses, thereby guaranteeing uniformity of plant characteristics in the final product.
2Productivity
If mechanical harvesting is implemented, then crop production efficiency is improved, but uniformity of plant characteristics such as plant height and ear height becomes critical
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific height parameters during the breeding process. The inbred line PH25JS was developed with controlled plant height and ear height characteristics through multiple generations of selfing and selection, ensuring uniformity that is essential for mechanical harvesting while maintaining high crop production efficiency.
3Reliability
If backcross conversion and transformation processes are used to introduce desired traits, then resistance to stresses and agronomic qualities are improved, but the complexity of the breeding process increases
Solution Approach 1:
The patent employs preliminary action by establishing the inbred line PH25JS as a stable genetic platform before introducing additional traits through backcross conversion and transformation. This pre-developed inbred line serves as a standardized foundation that simplifies subsequent breeding operations, allowing desired traits to be introduced systematically without overwhelming complexity.
Solution Approach 2:
The patent uses the inbred line PH25JS as an intermediary that bridges the gap between traditional breeding and modern biotechnology. The inbred line was developed through conventional crossing and backcrossing methods, then served as the basis for introducing additional traits through transformation and backcross conversion, thereby mediating between different breeding approaches and managing overall process complexity.
Data Source
AI summary
A novel maize variety designated PH25JS and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH25JS with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH25JS 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 PH25JS or a locus conversion of PH25JS with another maize variety.