The present invention relates to a marker for identifying a cucumber plant showing a compact growth phenotype, characterized by a shorter internode length and/or a smaller leaf area. The marker comprises a mutation in the Cullin1 gene, thereby providing cucumber plants with a shorter internode length and/or a smaller leaf area when compared to cucumber plants without the mutation in the Cullin1 gene. A plant that shows the resulting compact growth phenotype is in particular suitable for high-wire cultivation. Furthermore, the invention also relates to the use of a modified cucumber Cullin1 gene or a part thereof for identifying a cucumber plant showing a shorter internode length and/or a smaller leaf area.
