Maize Inbred PH12K7 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
The development of a novel maize variety, PH12K7, which incorporates specific traits through backcross conversion and transformation, enhancing resistance to various stresses and improving agronomic qualities like yield and maturity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding methods are used to combine desirable traits, then disease resistance and drought tolerance can be achieved, but the time to crop maturity is extended and yield uniformity is reduced
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred line PH12K7 with specific desirable traits (disease resistance, drought tolerance, uniformity) before hybrid development. This preliminary characterization allows for more efficient breeding by starting with a pre-optimized parent line, reducing the time needed to achieve desired traits in the final hybrid variety.
Solution Approach 2:
The patent employs parameter changes by modifying key breeding parameters including maturity rating (100-day maturity), plant height (68 inches), and ear height (32 inches) to optimize both disease resistance and time to maturity. These controlled parameter adjustments allow the hybrid to achieve resistance traits without excessive delays in crop maturity.
2Reliability
If traditional plant breeding methods are used to combine desirable traits, then drought tolerance can be achieved, but yield uniformity is reduced
Solution Approach 1:
The patent applies homogeneity by selecting and maintaining inbred line PH12K7 with highly uniform plant characteristics including consistent plant height (68 inches), ear height (32 inches), and maturity timing. This uniformity in the parent line translates to improved yield uniformity in the resulting hybrid, even while incorporating drought tolerance traits through controlled parameter changes.
3Productivity
If mechanical harvesting is implemented, then productivity is improved, but the requirement for uniformity of plant characteristics increases
Solution Approach 1:
The patent optimizes parameters for mechanical harvesting by establishing specific uniform characteristics in the hybrid variety: plant height of 68 inches, ear height of 32 inches, and 100-day maturity rating. These controlled parameter values ensure consistent plant architecture and synchronized maturity, enabling efficient mechanical harvesting while maintaining high productivity.
Data Source
AI summary
A novel maize variety designated PH12K7 and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH12K7 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH12K7 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 PH12K7 or a locus conversion of PH12K7 with another maize variety.