Maize Inbred PH2SJ4 Breeding for Stable Hybrid Production
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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
A novel maize variety, PH2SJ4, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and improved agronomic characteristics, using techniques such as backcross conversion, genetic manipulation, and transformation to introduce desired loci, allowing for the creation of hybrid seeds with enhanced traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding methods are used to combine desirable traits, then stable high-yielding hybrids are achieved, but the development process takes six to twelve years
Solution Approach 1:
The patent employs preliminary action by pre-establishing inbred lines with desired traits (such as PH2SJ4 with male sterility and disease resistance) before the actual hybridization process. This preparatory work organizes germplasm resources in advance, allowing breeders to directly produce F1 hybrids without lengthy selection processes, thereby reducing the overall breeding cycle while maintaining stability.
Solution Approach 2:
The breeding process is segmented into distinct phases: developing inbred lines with specific traits, establishing male-sterile lines for controlled pollination, and producing F1 hybrids. This segmentation allows parallel development of multiple inbred lines and streamlines the hybridization process, significantly reducing the time required compared to traditional sequential breeding methods.
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then agronomic performance is improved, but the breeding program complexity increases
Solution Approach 1:
The patent creates inbred lines that serve multiple functions simultaneously. For example, PH2SJ4 is designed to provide both male sterility (enabling hybrid production) and disease resistance (improving agronomic performance). This multi-functionality reduces the need for separate breeding programs for different traits and simplifies the overall breeding architecture.
Solution Approach 2:
Multiple desirable traits are merged into single inbred parent lines through systematic breeding. The patent combines male sterility, disease resistance, and high-yield potential into unified parental lines, which then produce F1 hybrids inheriting all these traits. This merging approach consolidates complex trait combinations into manageable parental genotypes.
Data Source
AI summary
A novel maize variety designated PH2SJ4 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2SJ4 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2SJ4 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 PH2SJ4 or a locus conversion of PH2SJ4 with another maize variety.