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United States Department of Agriculture

Agricultural Research Service

Research Project: USING GENETIC DIVERSITY OF IMPROVE QUANTITATIVE DISEASE RESISTANCE AND AGRONOMIC TRAITS OF CORN Title: Host Resistance

Authors
item Balint-Kurti, Peter
item Shew, David -
item Cowger, Christina

Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: January 1, 2014
Publication Date: N/A

Interpretive Summary: In this chapter for an undergraduate textbook we go over the basic concepts associated with plant disease resistance including the different types of resistance, their genetic bases, the measurement use and deployment of resistance and the breeding of resistant varieties. We also include some laboratory exercises that illustrate some of these ideas.

Technical Abstract: Concepts covered in this chapter (for an undergraduate text book) • Disease resistance is a crucial trait for any crop plant. • The degree of disease resistance varies within plant populations. Much of this variation has a genetic basis. • Plant disease resistance can be broadly categorized into several classes including qualitative and quantitative resistance, non-host resistance, and tolerance. • Some resistance is dependent on environment or growth stage. • In practice, all these different forms of resistance interact with each other in complex ways. • Disease resistance can be assessed in different ways. Accurate assessment is vital for correct characterization of resistance and for making selections during breeding. • Breeding for resistance utilizes traditional as well as modern methods such as genomic selection, and makes use of primary, secondary and tertiary gene pools. • Management of genetic resistance in the field is important for improving its effectiveness and durability. Reducing or offsetting genetic monoculture can help prolong the durability of resistance.

Last Modified: 10/24/2014
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