Exploring the Relationship Between Pattern-Triggered Immunity and Quantitative Resistance to Xanthomonas vasicola pv. Vasculorum in Maize

Alexander Mullens, Alexander E. Lipka, Peter Balint-Kurti, Tiffany Jamann

Research output: Contribution to journalArticlepeer-review

Abstract

Bacterial leaf streak (BLS) ofmaize is an emerging foliar disease ofmaize in the Americas. It is caused by the gram-negative nonvascular bacterium Xanthomonas vasicola pv. vasculorum. There are no chemical controls available for BLS, and thus, host resistance is crucial for managing X. vasicola pv. vasculorum. The objective of this study was to examine the genetic determinants of resistance to X. vasicola pv. vasculorum in maize, as well as the relationship between other defense-related traits and BLS resistance. Specifically, we examined the correlations among BLS severity, severity for three fungal diseases, flg-22 response, hypersensitive response, and auricle color.We conducted quantitative trait locus (QTL) mapping for X. vasicola pv. vasculorum resistance using the maize recombinant inbred line population Z003 (B73 × CML228). We detected three QTLs for BLS resistance. In addition to the disease resistance QTL, we detected a single QTL for auricle color. We observed significant, yet weak, correlations among BLS severity, levels of pattern-triggered immunity response and leaf flecking. These results will be useful for understanding resistance to X. vasicola pv. vasculorum and mitigating the impact of BLS on maize yields.

Original languageEnglish (US)
Pages (from-to)2127-2133
Number of pages7
JournalPhytopathology
Volume113
Issue number11
DOIs
StatePublished - Nov 2023

Keywords

  • Xanthomonas
  • bacterial leaf streak
  • maize
  • pattern-triggered immunity
  • quantitative disease resistance

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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