Maize Variety PH4CTD Breeding via Male Sterility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The development of new maize varieties and hybrids is a time-consuming process, requiring six to twelve years from the first cross to delivering finished seed to farmers, and existing technologies face challenges in creating stable, high-yielding varieties with desirable traits such as disease resistance, drought tolerance, and improved agronomic characteristics.
Innovation Solution
A novel maize variety, PH4CTD, 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 seeds with enhanced agronomic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding processes are used to develop new maize varieties, then stable and high-yielding varieties with desirable traits can be achieved, but the process takes six to twelve years which is time-consuming
Solution Approach 1:
The patent employs preliminary action by using male sterile lines and maintained lines to prevent self-pollination before hybrid seed production. This preliminary control measure ensures that only desired cross-pollination occurs, eliminating the need for lengthy selection processes and accelerating variety development while maintaining stability.
Solution Approach 2:
The patent uses a maintainer line as an intermediary to maintain the male sterile line without self-pollination. The maintainer line acts as a mediator that allows the male sterile line to be propagated while preventing unwanted selfing, thereby speeding up the breeding process without compromising variety stability.
2Adaptability or versatility
If traditional breeding methods are used, then desirable traits can be combined in a single variety, but the process requires numerous steps taking six to twelve years
Solution Approach 1:
The patent segments the breeding process into distinct functional components: male sterile lines for preventing self-pollination, maintainer lines for propagation, and test lines for evaluating combining ability. This segmentation allows parallel development of multiple trait combinations, reducing overall process complexity and time while maintaining the ability to combine multiple desirable traits.
Solution Approach 2:
The patent performs preliminary evaluation of combining ability using test lines before final variety development. This preliminary screening identifies the most promising trait combinations early in the process, reducing the number of steps needed to achieve desirable trait combinations and simplifying the overall breeding workflow.
3Stability of the object's composition
If male sterility is introduced to prevent self-pollination and ensure hybrid seed production, then uniformity can be maintained, but additional genetic manipulation steps are required
Solution Approach 1:
The patent employs self-service through cytoplasmic male sterility, where the plant's own cytoplasmic genetics automatically prevent self-pollination without requiring external intervention. This self-service mechanism ensures uniform hybrid seed production while minimizing the need for complex manual or genetic manipulation processes, as the sterility is inherent to the plant's cytoplasmic makeup.
Data Source
AI summary
A novel maize variety designated PH4CTD and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH4CTD with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH4CTD 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 PH4CTD or a locus conversion of PH4CTD with another maize variety.