Maize Inbred PH47WH Breeding via Segmentation and Preliminary Action
Find Innovative SolutionsGenerate Solutions
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, PH47WH, is developed through careful breeding and selection, incorporating traits like male sterility, disease resistance, and improved agronomic characteristics, using techniques such as backcross conversion, genetic manipulation, and transformation, allowing for the creation of hybrid maize seeds with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to develop new varieties with improved traits, then the desired traits (disease resistance, drought tolerance, yield) are achieved, but the development time is excessively long (6-12 years)
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, drought tolerance, yield potential) before hybridization. The inbred PH47WH was developed through preliminary breeding steps including selection of germplasm with target traits, multiple generations of inbreeding to fix alleles, and field testing to confirm trait expression and stability. This preliminary preparation of parent lines with known, stable traits accelerates the overall breeding process by eliminating the need for extensive trait verification in later generations.
2Productivity
If extensive breeding steps are performed to ensure variety stability and high yield, then reliable and high-yielding maize varieties are produced, but the development process becomes time-consuming
Solution Approach 1:
The patent applies copying by creating true-breeding inbred lines through repeated self-pollination over multiple generations. The inbred PH47WH was developed by selfing parent plants for several generations to achieve homozygosity, ensuring that the desirable traits (yield, disease resistance, drought tolerance) are fixed and will be consistently copied to all progeny. This genetic uniformity allows the hybrid to reliably express high yield and stress tolerance traits without requiring repeated breeding cycles to stabilize them.
3Adaptability or versatility
If multiple breeding objectives are combined in a single variety, then comprehensive improvement (disease resistance, drought tolerance, yield, maturity) is achieved, but the breeding process complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into distinct phases: (1) selection of germplasm with specific target traits, (2) inbreeding to fix individual traits in separate lines, (3) hybridization to combine traits, and (4) field testing to verify combined performance. The inbred PH47WH was developed through this segmented approach, where desirable traits were identified and fixed in the parent line through systematic inbreeding, then combined with complementary lines through controlled crosses. This segmentation of the breeding process makes managing multiple breeding objectives more tractable.
Data Source
AI summary
A novel maize variety designated PH47WH and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH47WH with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH47WH 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 PH47WH or a locus conversion of PH47WH with another maize variety.