Maize Inbred PH4CYJ Breeding via Backcross Conversion
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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 PH4CYJ, which can be bred using backcross conversion, genetic manipulation, and transformation techniques to incorporate traits like male sterility, herbicide tolerance, and disease resistance, along with processes for producing hybrid maize seeds through controlled pollination and tissue culture methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to combine desirable traits, then the resulting varieties have stable and agronomically sound characteristics, but the development process takes six to twelve years
Solution Approach 1:
The patent employs preliminary action by using backcross conversion to pre-establish the PH4CYJ inbred line with desired traits (male sterility, disease resistance, high yield potential) before hybrid development. This preparatory work creates a ready-to-use parental line that accelerates subsequent hybrid breeding programs, reducing the overall time from variety development to commercial deployment while maintaining genetic stability through systematic backcrossing protocols
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then the variety achieves high yield and stress tolerance, but the breeding process becomes more complex
Solution Approach 1:
The patent merges multiple desirable traits (male sterility, disease resistance, high yield potential, stress tolerance) into a single integrated inbred line PH4CYJ through systematic backcrossing. This consolidation approach combines previously separate trait developments into one unified genetic platform, simplifying subsequent hybrid development while maintaining all desired characteristics in a single parental line
Solution Approach 2:
The PH4CYJ inbred line serves multiple functions simultaneously: it provides male sterility for hybrid seed production, contributes disease resistance, offers stress tolerance, and delivers high yield potential. This multi-functional parental line replaces the need for separate parental lines for each trait, streamlining the breeding program while achieving comprehensive trait integration
Data Source
AI summary
A novel maize variety designated PH4CYJ and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH4CYJ with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH4CYJ 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 PH4CYJ or a locus conversion of PH4CYJ with another maize variety.