Maize Inbred PH2CV9 Breeding via Male Sterility
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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 PH2CV9, which can be produced through crossing with other maize plants, incorporating traits like male sterility and herbicide tolerance, insect resistance, and improved metabolic traits via genetic manipulation and transformation, along with specific breeding processes to ensure uniformity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breeding processes are used to develop new maize varieties, then desirable traits such as disease resistance, drought tolerance, and high yield can be combined, but the process takes six to twelve years and is time-consuming
Solution Approach 1:
The patent applies preliminary action by using male sterile lines and controlled pollination systems to pre-establish genetic uniformity and trait stability before variety development. The male sterile trait prevents unwanted pollination and ensures that desired genetic combinations are maintained throughout the breeding process, eliminating the need for lengthy verification periods and accelerating variety release while maintaining reliability
Solution Approach 2:
The patent uses male sterile lines as intermediaries to facilitate controlled crosses and trait combination. The male sterile trait acts as a mediator that enables precise control over pollination events, allowing breeders to efficiently combine multiple desirable traits (disease resistance, drought tolerance, high yield) in a systematic manner without the time-consuming process of traditional open-pollinated breeding
2Adaptability or versatility
If multiple desirable traits are combined in a single maize variety, then agronomic performance and stress resistance improve, but the complexity of the breeding program increases
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into distinct components: male sterile lines, maintainer lines, and restorer lines. This segmentation allows each component to be developed and evaluated independently for specific traits (disease resistance, drought tolerance, yield), then systematically combined. The male sterile trait serves as a segmenting mechanism that isolates and controls the contribution of each parental line, simplifying the management of complex multi-trait breeding programs
Solution Approach 2:
The patent uses male sterile lines as a universal tool that serves multiple functions simultaneously: controlling pollination, ensuring genetic purity, facilitating trait combination, and enabling efficient hybrid seed production. This multi-functionality reduces breeding program complexity by eliminating the need for separate systems to address each of these requirements, allowing a single integrated approach to combine multiple desirable traits across diverse agronomic conditions
Data Source
AI summary
A novel maize variety designated PH2CV9 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH2CV9 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH2CV9 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 PH2CV9 or a locus conversion of PH2CV9 with another maize variety.