Supplementary file: Images for J-index calculation in the article "Seed morphology in Vitis cultivars related to Hebén"

The J-index is the percent of similarity between the seed image and a geometric model. It is calculated by comparing two images: the seed image and the model. For this, the models are superimposed on images of 20 seeds of each cultivar, looking for maximum similarity. The models are overlaid on Adobe Photoshop files (PSD; Photoshop CC 2020; Adobe, San Jose, CA, USA) containing twenty seeds of each cultivar, and two new files are saved for each of these images: one with the model in black and one with the model in white. The Image J program provides for each of these images the values of total area (T, being the silhouette of the model in black, the whole area is considered) and area shared between the model and the seeds (S, being the silhouette of the model in white, the measured area is limited to the area shared between the seed and the model). Note that "T" is the total surface occupied by either the seed or the model, whereas in "S" the measured surface is shortened by the white profile of the model. For each seed the J-index is calculated as the ratio S/T. For each variety, the J-index is the mean value of its 20 (or 30) seeds.