Agronomy and Horticulture Department

 

Title

Herbicide Resistance: Mechanisms, Inheritance, and Molecular Genetics

Date of this Version

2019

Document Type

Article

Citation

Plant and Soil Sciences eLibrary (PASSeL) Lesson

Comments

Copyright © 2019 Carol Mallory-Smith and Deana Namuth. Used by permission.

This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, adminstered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the USDA or NSF.

Development of this lesson was supported in part by the Cooperative State Research, Education, & Extension Service, U.S. Dept. of Agriculture under Agreement Number 00-34416-10368 administered by Cornell University and the American Distance Education Consortium (ADEC). Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

Abstract

Explanation of the biochemical mechanisms and genetics of herbicide-resistance in weeds and the management and spread of herbicide-resistant weeds in relationship to the biochemical mechanisms and inheritance of resistance.

Overview

This lesson will detail the biochemical mechanisms and genetics of herbicide-resistance in weeds. Herbicide resistance is a major issue in weed science today; therefore, it is important to have a basic understanding of the process by which it occurs. The management and spread of herbicide-resistant weeds in relationship to the biochemical mechanisms and inheritance of resistance will be explained. Resistance based on changes in the target-site, herbicide metabolism and other types of resistance will be described.

Objectives

After completing this lesson, students will be able to:

  1. Understand the development of herbicide-resistance.
  2. Describe how and why herbicide resistance occurs based on the genetics and biochemistry involved.
  3. Explain the difference between target-site based resistance, metabolism-based resistance, and other types of resistance.
  4. Understand the difference between cross- and multiple-resistance.

Modules:

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