Maize Inbred PH1M49 Breeding for Disease Resistance and Uniformity
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Solution Overview
Problem
Current maize breeding techniques face challenges in combining desirable traits such as disease resistance, drought tolerance, and uniformity, which are essential for efficient crop production and mechanical harvesting.
Innovation Solution
The development of a novel maize variety, PH1M49, which is a homozygous inbred line with specific traits introgressed through backcross conversion and transformation, allowing for improved resistance to various stresses and uniform plant characteristics, enabling efficient seed production and hybrid development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding is used to combine desirable traits, then disease resistance and drought tolerance can be improved, but the time required to develop new varieties and the complexity of the breeding process increase
Solution Approach 1:
The patent employs preliminary action by pre-selecting and characterizing inbred lines with specific desirable traits (disease resistance, drought tolerance, uniformity) before hybrid development. PH1M49 was developed through systematic breeding and selection processes, with its traits predetermined and validated through multi-location trials, allowing faster hybrid deployment without compromising trait reliability
Solution Approach 2:
The patent applies parameter changes by modifying key breeding parameters including generation time (accelerated through modern breeding techniques), selection intensity (enhanced through phenotypic and molecular markers), and trait combination strategies (systematic crossing of inbreds with complementary traits). These parameter optimizations reduce breeding cycle time while maintaining or improving disease resistance and drought tolerance
2Adaptability or versatility
If multiple desirable traits are combined in a single variety, then adaptability and yield are improved, but the uniformity of plant characteristics may be compromised
Solution Approach 1:
The patent applies segmentation by dividing the complex trait combination task into manageable components through the use of distinct inbred lines, each optimized for specific traits. PH1M49 combines disease resistance, drought tolerance, and uniformity by segmenting the breeding process into parental line selection, controlled crossing, and systematic evaluation, allowing each trait to be independently optimized before combination
Solution Approach 2:
The patent employs composite materials principle by creating a composite genetic structure through hybridization of inbred lines with complementary traits. The F1 hybrid PH1M49 represents a composite of parental genomes, combining disease resistance from one parent, drought tolerance from another, and uniformity through homozygosity, achieving adaptability across multiple stress conditions while maintaining plant uniformity
3Productivity
If inbred lines with specific traits are developed, then hybrid seed production efficiency is improved, but the complexity of the breeding program and selection processes increases
Solution Approach 1:
The patent applies the taking out principle by extracting and isolating specific desirable traits into distinct inbred lines before combination. PH1M49 was developed by extracting disease resistance, drought tolerance, and uniformity characteristics into separate parental inbreds, then combining them through controlled crossing. This extraction approach simplifies the overall breeding program by modularizing trait development
Solution Approach 2:
The patent employs universality by developing inbred lines with multi-functional trait combinations that can be used across multiple hybrid developments. PH1M49 serves as a versatile parental line that contributes disease resistance, drought tolerance, and uniformity to various F1 hybrids, reducing the need for separate breeding programs for each hybrid and thereby simplifying overall breeding program complexity
Data Source
AI summary
A novel maize variety designated PH1M49 and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing maize variety PH1M49 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH1M49 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the variety PH1M49 or a locus conversion of PH1M49 with another maize variety.