Maize Inbred PH47H6 Breeding for Yield Stability
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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 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
The introduction of the novel maize variety PH47H6, which involves specific breeding techniques including backcross conversion, genetic manipulation, and transformation to incorporate traits like male sterility, disease resistance, and improved metabolic traits, along with processes for producing hybrid seeds through controlled pollination and tissue culture.
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 drought tolerance can be incorporated, but the development process takes six to twelve years making it time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-establishing inbred lines with desirable traits through controlled crosses and selections before the actual variety development. The inbred lines are prepared in advance with specific traits (disease resistance, drought tolerance, yield characteristics) so that when hybrids are developed, the desired traits are already present in the parent lines, significantly reducing the overall development time while maintaining trait reliability.
2Stability of the object's composition
If inbred lines are developed through multiple generations of selfing, then genetic uniformity is achieved, but the process requires multiple generations increasing development time
Solution Approach 1:
The patent extracts and utilizes specific desirable traits from diverse germplasm sources into separate inbred lines before hybrid development. By identifying and isolating specific traits (disease resistance genes, drought tolerance alleles, yield-related characteristics) and incorporating them into individual inbred lines through targeted crosses, the process achieves genetic uniformity with the desired traits without requiring excessive generations of random selfing, thus reducing development time while maintaining stability.
3Manufacturing precision
If hybrid seed production is performed manually through controlled pollination, then trait control is precise, but labor and production costs increase
Solution Approach 1:
The patent applies self-service by utilizing the natural pollination behavior of maize plants. The inbred lines are designed with specific floral characteristics and pollen release patterns that enable controlled cross-pollination through natural mechanisms. The female parent plants are planted in specific configurations that attract pollen from the male parent, and the system utilizes natural insect pollinators and wind to achieve controlled fertilization, reducing manual labor while maintaining precise trait control through the self-regulating biological system.
Data Source
AI summary
A novel maize variety designated PH47H6 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH47H6 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH47H6 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 PH47H6 or a locus conversion of PH47H6 with another maize variety.