Images of selected mutant phenotypes observed in the melon TILLING population. a) Mutant seedlings found in M2. From left to right and from top to bottom, variations in cotyledons number and position, alterations in leaf and shoot morphology, albinism and chlorosis, including virus-like symptoms, dwarfing and altered gravitropism compared with seedling wild type. b) First row: Mutations found in adult M3 plants, chlorosis, dwarfing and leaf and flower deformation. Second row: alterations in fruits in comparison with wild type, deformation, chlorosis, rough surface, and pear-shape. Third row: fruit phenotypes of interest for melon breeding, variation in shape, longer and rounder melons, and melons with a subtle aroma and formation of abscission layer with or without color change. c) Variation in triple response: M2 families showing a more intense response to ethylene than wild type and others segregating for the response.