Maize Inbred PH2TVH Breeding via CGMS and Markers
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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 creating stable, high-yielding maize varieties with desirable traits such as disease resistance, drought tolerance, and improved agronomic characteristics.
Innovation Solution
A novel maize variety, PH2TVH, 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 methods are used to develop new maize varieties, then desirable traits such as disease resistance and yield can be achieved, but the development process takes six to twelve years which is excessively time-consuming
Solution Approach 1:
The patent utilizes male sterility traits and cytoplasmic genetic male sterility (CGMS) systems to pre-establish controlled breeding conditions before actual crossbreeding. This preliminary setup of sterility mechanisms and parental line preparation accelerates the breeding process by eliminating the need for manual emasculation and self-pollination control, thereby reducing overall breeding time while maintaining reliable trait inheritance
Solution Approach 2:
The patent introduces molecular markers as intermediaries to track and select desirable traits during breeding. These markers serve as proxies for disease resistance genes and other important traits, enabling breeders to identify and select plants with desired characteristics more rapidly through marker-assisted selection, thus reducing the time required to develop varieties with reliable disease resistance
2Productivity
If multiple desirable traits are combined in a single maize variety, then agronomic performance and yield can be improved, but the complexity of the breeding program increases significantly
Solution Approach 1:
The patent divides the breeding program into distinct segments: developing inbred lines with specific traits, creating maintainer and restorer lines for CGMS systems, and then combining them in controlled crosses. This segmentation allows each component to be optimized independently for yield and disease resistance, then assembled into complete hybrid varieties, reducing overall program complexity while achieving multiple desirable traits
Solution Approach 2:
The patent develops universal inbred lines that can serve multiple functions: they can be used as parental lines for different hybrid combinations, maintain CGMS sterility, and carry multiple desirable traits simultaneously. This multi-functionality reduces breeding program complexity by reusing the same genetic materials across different breeding objectives rather than developing separate lines for each trait combination
Data Source
AI summary
A novel maize variety designated PH2TVH and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2TVH with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2TVH 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 PH2TVH or a locus conversion of PH2TVH with another maize variety.