Maize Inbred PH42RF Breeding Acceleration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The development of new maize varieties is a time-consuming process that takes six to twelve years, and there is a continuous need for stable, high-yielding maize varieties with improved traits such as disease resistance, drought tolerance, and better agronomic characteristics.
Innovation Solution
A novel maize variety, PH42RF, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and drought tolerance, achieved through backcross conversion, genetic manipulation, and transformation, allowing for the creation of hybrid maize seeds with enhanced characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to develop new varieties with improved traits, then disease resistance and drought tolerance 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 desirable traits (disease resistance, drought tolerance) before hybridization. The inbred lines are developed and evaluated in advance, allowing breeders to quickly combine proven traits without repeating lengthy selection processes. This preliminary preparation of genetic material significantly reduces the overall breeding timeline while maintaining trait reliability.
Solution Approach 2:
The breeding process is segmented into distinct phases: developing individual inbred lines with specific traits, evaluating them separately, and then combining them in hybrid crosses. This segmentation allows parallel development of multiple inbred lines with different traits, which can then be efficiently combined. The patent demonstrates this by creating multiple inbred lines with different resistance traits that can be independently developed and then combined in hybrid combinations.
2Reliability
If multiple desirable traits are combined in a single maize variety through traditional breeding, then agronomic soundness is improved, but the complexity of the breeding program increases
Solution Approach 1:
The complex task of combining multiple traits is segmented into manageable components by developing individual inbred lines, each optimized for specific traits. This allows the breeding program to handle complexity in a systematic way - each inbred line becomes a modular unit with defined characteristics that can be independently evaluated and then combined. The patent shows this approach by creating inbred lines with specific trait combinations that can be systematically tested and deployed.
Solution Approach 2:
The patent develops inbred lines that serve multiple functions: they can be used as parents in hybrid combinations, as maintenance lines for cytoplasmic male sterility systems, and as sources of specific resistance traits. This multi-functionality reduces overall program complexity by creating versatile genetic materials that can address multiple breeding objectives simultaneously, rather than requiring separate development programs for each function.
3Reliability
If stable, high-yielding maize varieties are developed through extensive breeding, then yield stability is improved, but the time from first cross to seed delivery is extended
Solution Approach 1:
Yield stability is addressed through preliminary action by developing and evaluating inbred lines for combining ability and yield performance before final hybridization. The patent demonstrates this by conducting preliminary tests on inbred lines to assess their yield potential and stability characteristics, allowing breeders to select the best combinations in advance. This preliminary evaluation ensures yield stability is built into the genetic foundation before the final hybrid seed production phase.
Solution Approach 2:
Once stable hybrid combinations are developed through the breeding process, they can be copied and reproduced consistently in seed production fields. The patent shows how successful hybrid combinations are replicated across multiple production cycles, maintaining yield stability through consistent propagation of the proven genetic combination. This copying approach allows the time investment in development to be amortized across multiple seed production cycles.
Data Source
AI summary
A novel maize variety designated PH42RF and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH42RF with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH42RF 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 PH42RF or a locus conversion of PH42RF with another maize variety.