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Cucumber is a perishable vegetable crop with limited storability, and development of genotypes with extended shelf-life will help in reducing post-harvest loss. One natural variant, DC-48 with extended shelf-life, was used to understand the genetics of the associated traits and identify the genomic regions and associated candidate genes. Scanning electron microscopy revealed differences in the structure of the epicarp in the genotypes. Programmed cell death (PCD) and appearance of senescence-related dark spots (SRDS) in the epicarp of the cucumber fruit with low shelf-life were also detected. Retention of green colour, absence of any shrinkage, retention of fruit firmness and slow change in the pH of the endocarp were essential traits associated with extended shelf-life. Single recessive gene govern retention of green colour while the remaining traits were polygenic. One QTL detected through QTL-seq on …