Rationalization of genes for resistance to Bremia lactucae in lettuce

Lorena Parra, Brigitte Maisonneuve, Ales Lebeda, Johan Schut, Marilena Christopoulou, Marieke Jeuken, Leah McHale, Maria Jose Truco, Ian Crute, Richard Michelmore*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

54 Citations (Scopus)


Lettuce downy mildew caused by Bremia lactucae is the most important disease of lettuce worldwide. Breeding for resistance to this disease is a major priority for most lettuce breeding programs. Many genes and factors for resistance to B. lactucae have been reported by multiple researchers over the past ~50 years. Their nomenclature has not been coordinated, resulting in duplications and gaps in nominations. We have reviewed the available information and rationalized it into 51 resistance genes and factors and 15 quantitative trait loci along with supporting documentation as well as genetic and molecular information. This involved multiple rounds of consultation with many of the original authors. This paper provides the foundation for naming additional genes for resistance to B. lactucae in the future as well as for deploying genes to provide more durable resistance.

Original languageEnglish
Pages (from-to)309-326
Issue number3
Publication statusPublished - 2016


  • Dm gene
  • Lactuca spp.
  • Lettuce downy mildew
  • Plant breeding
  • Quantitative trait locus
  • Resistance genes


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