Maize NLB18 Marker Selection for Northern Leaf Blight Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for managing northern leaf blight in maize, caused by Exserohilum turcicum, require significant time, resources, and can have environmental impacts, making the development of resistant hybrids more attractive but limited by the presence of various races of the pathogen.
Innovation Solution
Identify and select maize plants with enhanced resistance to northern leaf blight by detecting specific marker alleles or haplotypes linked to known resistance loci, such as PH26N and PH99N, and utilize recombinant DNA constructs to enhance resistance through genetic modification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disease management strategies such as crop rotation, tillage, and fungicide application are used to reduce fungal inoculum, then northern leaf blight control is improved, but time consumption, resource usage, and environmental impact increase
Solution Approach 1:
The patent applies preliminary action by developing and deploying resistant maize hybrids before the disease season begins. The resistance genes are bred into the crop varieties in advance, so that when planting occurs, the plants already possess inherent resistance to northern leaf blight, eliminating the need for time-consuming disease management interventions during the growing season.
Solution Approach 2:
The patent implements self-service by enabling the maize plants to protect themselves through genetically conferred resistance. The resistant hybrids possess intrinsic biological mechanisms that prevent or limit fungal infection, allowing the crop to defend itself against northern leaf blight without requiring external interventions such as fungicide applications or cultural practices.
2Reliability
If resistant hybrids are planted to control northern leaf blight, then disease resistance is improved, but the complexity of selecting appropriate hybrids increases due to multiple pathogen races
Solution Approach 1:
The patent applies universality by developing resistant hybrids that possess broad-spectrum resistance capable of protecting against multiple races of Exserohilum turcicum. Rather than requiring separate hybrids for each pathogen race, the invention creates a universal solution where a single hybrid can provide protection across diverse racial types, simplifying the selection process for growers.
Solution Approach 2:
The patent utilizes parameter changes by modifying the genetic composition of maize hybrids to incorporate resistance genes that confer enhanced protection. By changing the genetic parameters of the hybrids through breeding programs, the patent creates varieties with improved resistance characteristics that can effectively counter multiple pathogen races without increasing selection complexity.
3Reliability
If race-specific resistant hybrids are used, then protection against a specific pathogen race is improved, but adaptability to multiple races deteriorates
Solution Approach 1:
The patent applies merging by combining multiple resistance genes or gene combinations within single hybrid varieties. By integrating several resistance determinants into one hybrid, the patent creates plants that simultaneously possess protection against multiple pathogen races, thereby merging the benefits of race-specific resistance into a single adaptable variety that maintains both effectiveness and broad-spectrum coverage.
Data Source
AI summary
Provided herein are a maize plant comprising a heterologous DNA sequence that comprises an NLB18 sequence associated with resistance to northern leaf blight and a method of generating a maize plant comprising resistance to northern leaf blight.