Maize Inbred PH47DD Accelerates Hybrid Development
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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, PH47DD, 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 maize seeds with enhanced agronomic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to develop new varieties with desirable traits, then traits such as disease resistance, drought tolerance, and yield improvement can be achieved, but the development time becomes excessively long (6-12 years)
Solution Approach 1:
The patent applies preliminary action by pre-selecting and characterizing inbred line PH47DD with specific desirable traits (drought tolerance, disease resistance, yield stability) before hybrid development. This preliminary characterization allows breeders to immediately utilize the inbred line's proven performance characteristics, eliminating the need for lengthy field testing and variety development that would normally take 6-12 years. The inbred line serves as a pre-validated genetic platform that accelerates subsequent hybrid variety development.
2Adaptability or versatility
If multiple desirable traits are combined in a single maize variety through traditional breeding, then agronomic performance and yield can be improved, but the breeding process becomes more complex and time-consuming
Solution Approach 1:
The patent merges multiple desirable traits (drought tolerance, disease resistance, yield stability, male sterility) into a single inbred line PH47DD through systematic breeding. This consolidation allows the inbred line to serve as a unified genetic platform that combines these traits, simplifying subsequent hybrid development. Breeders can now combine this pre-consolidated inbred line with other complementary lines to create hybrids with enhanced agronomic performance without managing complex multi-trait breeding programs.
Solution Approach 2:
The inbred line PH47DD exhibits multi-functionality by serving multiple purposes: it provides drought tolerance, disease resistance, yield stability, and male sterility for hybrid seed production. This universal genetic platform can be used across different hybrid combinations and environmental conditions, reducing the need for separate breeding programs for each trait and simplifying overall breeding complexity.
3Productivity
If male sterility is introduced into maize varieties to prevent self-pollination and enable hybrid production, then hybrid seed purity and yield can be improved, but the breeding and selection processes become more difficult
Solution Approach 1:
The inbred line PH47DD exhibits self-service through its male sterile trait, which automatically prevents self-pollination without requiring manual intervention. The plant self-regulates its reproductive behavior by being inherently incapable of self-fertilization, eliminating the need for labor-intensive detasseling or emasculation procedures. This self-service mechanism simplifies hybrid seed production by ensuring cross-pollination occurs naturally while maintaining hybrid seed purity.
Data Source
AI summary
A novel maize variety designated PH47DD and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH47DD with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH47DD 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 PH47DD or a locus conversion of PH47DD with another maize variety.