Maize Inbred PH2RRA Breeding for Stable High 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 PH2RRA, which involves crossing with another maize plant 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 maize 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 developing inbred line PH2RRA with pre-established desirable traits including disease resistance, drought tolerance, and improved agronomic characteristics through prior breeding work. This pre-developed genetic foundation allows faster hybrid development compared to starting from scratch, reducing the overall breeding timeline while maintaining variety stability
Solution Approach 2:
The patent uses inbred line PH2RRA as an intermediary genetic platform that can be crossed with other inbred lines to produce hybrids. This intermediary approach allows the transfer of desirable traits through controlled crosses, enabling faster variety development while maintaining agronomic soundness through the standardized genetic background of PH2RRA
2Productivity
If multiple desirable traits are combined in a single variety, then yield and agronomic performance are improved, but the breeding process becomes more complex
Solution Approach 1:
The patent merges multiple desirable traits including disease resistance, drought tolerance, and improved agronomic characteristics into the single inbred line PH2RRA through prior breeding work. This consolidation of traits into a unified genetic platform simplifies subsequent hybrid development, as breeders can cross PH2RRA with other lines to efficiently combine traits without managing multiple separate breeding programs
Solution Approach 2:
The patent applies parameter changes by modifying the genetic composition of inbred line PH2RRA to incorporate specific traits such as disease resistance, drought tolerance, and improved agronomic characteristics. These genetic parameter changes enable the line to contribute multiple desirable traits to hybrid offspring, improving productivity while streamlining the breeding process
Data Source
AI summary
A novel maize variety designated PH2RRA and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2RRA with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2RRA 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 PH2RRA or a locus conversion of PH2RRA with another maize variety.