Abstract
Lettuce is one of the most produced and consumed vegetables worldwide. Several diseases decrease its production, but in mild climate, downy mildew (Bremia lactucae) stands out. Genetic resistance is widely accepted as the most sustainable control strategy. Since 2002, the Núcleo de Estudos em Olericultura e Melhoramento of UNESP-FCAV has been developing curled green-leaf lettuce lines res…