Maize Inbred PH2RK6 Breeding for Disease Resistance and Yield
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Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, taking six to twelve years, and existing technologies face challenges in combining desirable traits such as disease resistance, drought tolerance, and high yield in a stable and agronomically sound manner.
Innovation Solution
The introduction of the novel maize variety PH2RK6, which involves crossing with other maize plants to introduce traits like male sterility, disease resistance, and improved agronomic characteristics through backcross conversion, genetic manipulation, and transformation, along with specific breeding methods to produce stable and high-yielding hybrids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to combine desirable traits, then stable and agronomically sound varieties are achieved, but the development process takes six to twelve years
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, drought tolerance, yield potential) before combining them. The inbred line PH2RK6 was developed through preliminary breeding steps including selection, inbreeding, and characterization of agronomic traits, which prepares the genetic material in advance for efficient hybrid combination, thereby reducing overall development time while maintaining stability
2Productivity
If multiple desirable traits are combined in a single variety, then yield and stress resistance are improved, but the breeding process becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the breeding process into distinct stages: developing individual inbred lines with specific traits (PH2RK6 with disease resistance and drought tolerance), characterizing their agronomic properties, and then combining them in hybrid crosses. This segmented approach allows each inbred line to be optimized for particular traits independently, making the overall process of combining multiple desirable traits more manageable and less complex
3Reliability
If inbred lines with specific traits are developed through systematic breeding, then disease resistance and stress tolerance are achieved, but the time to maturity is extended
Solution Approach 1:
The patent applies parameter changes by systematically varying breeding parameters including selection criteria, inbreeding duration, and crossing schemes to develop inbred lines with enhanced disease resistance and stress tolerance. The methodology involves controlled changes in breeding parameters over generations to achieve desired trait expression while monitoring and optimizing time to maturity, thereby improving reliability without excessive extension of the breeding timeline
Data Source
AI summary
A novel maize variety designated PH2RK6 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2RK6 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2RK6 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby are provided. Hybrid maize seed, plants or plant parts are produced by crossing the variety PH2RK6 or a locus conversion of PH2RK6 with another maize variety.