The Rxo1/ Rba1 Locus of Maize Controls Resistance Reactions to Pathogenic and Non-host Bacteria

Overview

Journal Theor Appl Genet

Publisher Springer

Specialty Genetics

Date 2004 Apr 29

PMID 15114472

Citations 16

Authors

B Y Zhao

E Ardales

E Brasset

L E Claflin

J E Leach

S H Hulbert

Affiliations

Soon will be listed here.

Abstract

Infiltration of different maize lines with a variety of bacterial pathogens of maize, rice and sorghum identified qualitative differences in resistant reactions. Isolates from two bacterial species induced rapid hypersensitive reactions (HR) in some maize lines, but not others. All isolates of the non-host pathogen Xanthomonas oryzae pv. oryzicola (bacterial leaf streak disease of rice) and some isolates of the pathogenic bacterium Burkholderia andropogonis induced HR when infiltrated into maize line B73, but not Mo17. Genetic control of the HR to both bacteria segregated as a single dominant gene. Surprisingly, both phenotypes mapped to the same locus, indicating they are either tightly linked or controlled by the same gene. The locus maps on the short arm of maize chromosome six near several other disease-resistance genes. Results indicate the same type of genes may contribute to both non-host resistance and resistance to pathogens.

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