Maize Inbred PH4DG8 Breeding Cycle Reduction
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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 PH4DG8, which incorporates traits like male sterility, disease resistance, and improved agronomic characteristics through backcross conversion, genetic manipulation, and transformation, allowing for the creation of stable, high-yielding hybrids with specific loci conversions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then stable high-yielding hybrids can be developed, but the process takes six to twelve years which is too time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-establishing an inbred line (PH4DG8) with a comprehensive foundation of desirable traits including disease resistance, drought tolerance, and high yield potential. This pre-developed genetic platform allows breeders to start hybrid development with a head start, having already consolidated multiple desirable traits into a single stable inbred line before the formal breeding process begins, thereby reducing the overall time required to develop new hybrids.
Solution Approach 2:
The patent employs parameter changes by utilizing genetic manipulation and transformation techniques to directly modify specific genetic parameters in the PH4DG8 inbred line. By changing genetic parameters through targeted gene editing or transgenic approaches rather than traditional multi-generational crossing, the breeding process can achieve trait incorporation in a single generation or fewer, dramatically reducing the breeding cycle from 6-12 years to a much shorter timeframe while maintaining stability.
2Productivity
If multiple desirable traits are combined in a single variety, then agronomic performance and yield are improved, but the complexity of the breeding program increases
Solution Approach 1:
The patent applies merging by consolidating multiple desirable traits (disease resistance, drought tolerance, high yield, male sterility) into a single integrated inbred line (PH4DG8). By merging these traits into one unified genetic platform rather than managing them as separate breeding programs, the overall complexity is reduced while maintaining high productivity when this inbred line is crossed with other compatible inbreds to produce hybrids.
Solution Approach 2:
The patent employs universality by creating PH4DG8 as a multi-functional inbred line that can serve multiple purposes: it provides disease resistance, drought tolerance, high yield potential, and male sterility for hybrid seed production. This single inbred line can be used as a parent in multiple different hybrid combinations, making the breeding program more efficient and less complex by eliminating the need to develop separate inbred lines for each trait combination.
Data Source
AI summary
A novel maize variety designated PH4DG8 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH4DG8 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH4DG8 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 PH4DG8 or a locus conversion of PH4DG8 with another maize variety.