Maize Inbred PH4CP9 Breeding via Male Sterility and Trait Merging
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Solution Overview
Problem
The development of new maize varieties is a time-consuming process that takes six to twelve years, and there is a continuous need for stable, high-yielding maize varieties with improved traits such as disease resistance, drought tolerance, and better agronomic characteristics.
Innovation Solution
A novel maize variety, PH4CP9, 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 improved traits can be achieved, but the development time is excessively long (six to twelve years)
Solution Approach 1:
The patent applies preliminary action by pre-establishing an inbred maize line (PH4CP9) with predetermined desirable traits including disease resistance, drought tolerance, and male sterility. This pre-developed genetic foundation allows breeders to skip lengthy traditional breeding steps and directly create hybrids by crossing with other inbreds, dramatically reducing development time from 6-12 years to a fraction of that period while maintaining variety stability and reliability
2Adaptability or versatility
If multiple desirable traits are combined in a single maize variety through traditional breeding, then disease resistance, drought tolerance, and yield improvement can be achieved, but the breeding process becomes extremely time-consuming
Solution Approach 1:
The patent merges multiple desirable traits into a single integrated inbred maize line (PH4CP9) through prior breeding work. This inbred line combines disease resistance, drought tolerance, male sterility, and good combining ability into one genetic package. By merging these traits beforehand, the patent enables rapid hybrid development without requiring separate breeding programs for each trait, thus reducing overall development time while maintaining high adaptability and versatility
3Productivity
If male sterility is introduced into maize varieties to facilitate hybrid seed production, then cross-pollination efficiency is improved, but the breeding process complexity increases
Solution Approach 1:
The patent applies self-service by incorporating male sterility into the inbred maize line (PH4CP9), which enables the plant to automatically prevent self-pollination. This self-sterility mechanism eliminates the need for manual detasseling or complex emasculation procedures that would otherwise be required to ensure cross-pollination. The male-sterile trait serves itself by naturally blocking self-fertilization, thereby simplifying the overall breeding process while maintaining high hybrid seed production efficiency
Data Source
AI summary
A novel maize variety designated PH4CP9 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH4CP9 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH4CP9 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 PH4CP9 or a locus conversion of PH4CP9 with another maize variety.