Maize Inbred PH472K Breeding for Disease Resistance
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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 PH472K, which involves crossing with other maize plants to introduce traits like male sterility, disease resistance, and improved agronomic characteristics through backcross conversion, genetic manipulation, and transformation, along with specific breeding processes to achieve desired phenotypic and genotypic stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding processes are used to combine desirable traits, then disease resistance 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 PH472K with desired traits (disease resistance, yield potential, agronomic performance) before hybrid development. This preliminary characterization allows breeders to start hybrid breeding with a pre-validated parent line, reducing the time required for trait validation in later breeding stages.
2Productivity
If multiple desirable traits are combined in a single variety, then agronomic performance and yield are improved, but the breeding process complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the breeding process into distinct stages: inbred line development (producing PH472K with specific traits), hybrid development (combining PH472K with other inbreds), and trait introgression (adding specific characteristics). This segmentation allows each stage to be optimized independently, managing complexity while achieving multi-trait combinations.
Solution Approach 2:
The patent applies local quality by focusing on specific trait combinations in specific breeding contexts. PH472K is developed with particular strengths (disease resistance, yield) that can be combined with other inbreds having complementary traits. This approach allows tailoring hybrid combinations to specific agronomic needs rather than attempting to combine all possible traits in every variety.
3Loss of time
If genetic manipulation and transformation are used to introgress traits, then breeding time is reduced, but genetic integrity may be compromised
Solution Approach 1:
The patent uses backcrossing as an intermediary approach between traditional breeding and genetic manipulation. PH472K serves as a recurrent parent in backcross programs, allowing gradual introgression of desired traits while maintaining the genetic background and integrity of the base variety. This intermediary approach balances speed with genetic stability.
Data Source
AI summary
A novel maize variety designated PH472K and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety PH472K with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH472K 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 PH472K or a locus conversion of PH472K with another maize variety.