Rationalization of genes for resistance to[i] Bremia lactucae[/i] in lettuce

Lorena Parra (1) , Brigitte Maisonneuve (2) , Ales Lebeda (3) , Johan Schut (4) , Marilena Christopoulou (1) , Marieke Jeuken (5) , Leah Mchale (6) , Maria-Jose Truco (1) , Ian Crute (7) , Richard Michelmore (1)

1 Genome Center and Department of Plant Sciences
2 GAFL - Génétique et Amélioration des Fruits et Légumes
3 Department of Botany
4 Rijk Zwaan Breeding
5 Laboratory of Plant Breeding
6 Department of Horticulture and Crop Science
7 AHDB - Agriculture and Horticulture Development Board

Lettuce downy mildew caused by[i] Bremia lactucae[/i] 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 [i]B. lactucae[/i] 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 [i]B. lactucae[/i] in the future as well as for deploying genes to provide more durable resistance.

Mots clés: Lactuca spp; resistance genes; lettuce downy mildew; dm gene; quantitative trait locus; plant breeding

Domaines: Sciences agricoles

Lorena Parra, Brigitte Maisonneuve, Ales Lebeda, Johan Schut, Marilena Christopoulou, et al.. Rationalization of genes for resistance to[i] Bremia lactucae[/i] in lettuce. Euphytica, 2016, 210 (3), pp.309-326. ⟨10.1007/s10681-016-1687-1⟩. ⟨hal-01379669⟩