Seed images and graphic representation of curvature values in whole seeds of: a. CA 13.4; b. Tortozón; c. de Cuerno. Seed images were inserted in Mathematica, a set of points was marked on their profile, the coordinates of the points were obtained and run in a programme (Tocino and Cervantes 2008) to obtain the Bézier Curves and graphs representing the corresponding curvatures.

  
  Part of: Cervantes E, Martín-Gómez JJ, Espinosa-Roldán FE, Muñoz-Organero G, Tocino Á, Cabello Sáenz de Santamaría F (2021) Seed apex curvature in key Spanish grapevine cultivars. Viticulture Data Journal 3: e66478. https://doi.org/10.3897/vdj.3.e66478