Maize Inbred 1PPGK72 for Backcross Trait Conversion
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Solution Overview
Problem
The development of new maize varieties is a time-consuming process that requires years to combine desirable traits such as disease resistance, drought tolerance, and high yield, posing challenges in efficiently producing stable and agronomically sound maize varieties.
Innovation Solution
The development of a novel maize variety, 1PPGK72, with introduced traits like male sterility, disease resistance, and drought tolerance through backcross conversion, genetic manipulation, and transformation, along with processes for producing hybrid seeds and plants, ensuring genetic purity and desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional maize breeding methods are used to combine desirable traits, then the resulting varieties have improved disease resistance, drought tolerance, and yield, but the development process takes 6-12 years and is highly time-consuming
Solution Approach 1:
The patent employs preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, drought tolerance, yield potential) before combining them. The inbred line 1PPGK72 has been pre-developed with confirmed resistance to multiple diseases (gray leaf spot, northern leaf blight, common rust) and abiotic stresses, allowing breeders to start hybrid development with already-optimized parental material rather than creating resistance from scratch in each breeding program.
Solution Approach 2:
The patent utilizes copying by providing inbred line 1PPGK72 as a reusable genetic resource that can be copied and distributed to multiple breeding programs. This single inbred line serves as a proven parental source that can be repeatedly crossed with different inbreds to generate multiple hybrid varieties, eliminating the need to rediscover the same resistance and yield traits in separate breeding efforts.
2Reliability
If traditional maize breeding methods are used to combine desirable traits, then the resulting varieties have improved drought tolerance and yield, but the process requires numerous steps and is highly complex
Solution Approach 1:
The patent applies the extraction principle by isolating and concentrating multiple desirable traits (disease resistance, drought tolerance, yield) into a single inbred line (1PPGK72). This extracted genetic package can then be introduced into hybrid programs through simple crosses, removing the complexity of simultaneously managing multiple separate breeding programs for different traits.
Solution Approach 2:
The inbred line 1PPGK72 exhibits universality by serving multiple functions simultaneously: it provides resistance to multiple diseases (gray leaf spot, northern leaf blight, common rust), confers drought tolerance, maintains high yield potential, and can be used as a parental line in various hybrid combinations. This multi-functional inbred line replaces what would otherwise require several different specialized parental lines.
3Reliability
If inbred line 1PPGK72 is crossed with other maize inbreds to produce hybrids, then the hybrids inherit improved disease resistance and drought tolerance, but ensuring genetic purity and maintaining desired characteristics requires rigorous quality control
Solution Approach 1:
The patent replaces mechanical quality control methods with molecular marker-based detection systems. Instead of relying solely on phenotypic observation and manual quality control during hybrid seed production, the invention employs DNA markers to verify the presence of desirable traits and confirm genetic purity, providing more precise and reliable quality assurance.
Solution Approach 2:
The patent implements feedback mechanisms through molecular marker analysis that provides information about the genetic composition of hybrid progeny. This feedback allows breeders to identify and select hybrids that successfully inherited the desired traits from inbred line 1PPGK72, enabling continuous improvement and verification of hybrid quality across production batches.
Data Source
AI summary
A novel maize variety designated 1PPGK72 and seed, plants and plant parts thereof are provided. Methods for producing a maize plant comprise crossing maize variety 1PPGK72 with another maize plant are provided. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into 1PPGK72 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 1PPGK72 or a locus conversion of 1PPGK72 with another maize variety.