Abstract: The present invention relates to a lettuce plant, with a modified LsKO2 and/or Ls20ox1-B gene, wherein the homozygous presence of said genes leads to a shade tolerant phenotype, the wild-type LsKO2 gene and the wild-type Ls20ox1-B gene can have a coding sequence having at least 70% sequence identity to SEQ ID NO.: 9 and SEQ ID NO.: 11, respectively. The modification involves replacement and/or deletion and/or insertion of nucleotides resulting in an absence of functional KO2 and/or GA20ox1-B protein or the modification results in the absence of the wild-type LsKO2 and/or Ls20ox1-B gene. The homozygous presence of one or both of the modified LsKO2 and Ls20ox1-B genes or the homozygous absence of one or both of the wild-type LsKO2 and/or Ls20ox1-B genes in the plant confers shade tolerance as compared to a plant with the wild-type LsKO2 and Ls20ox1-B gene and not showing shade tolerance.