Quantifying the reproductive progression of sunflower using FIJI (Image J)

Sunflower (Helianthus annuus • This is a simple method for the estimation of the number of disc flowers at each phenophase in the sunflower receptacle. • It is based on integrating the knowledge of sunflower reproductive development with an open-source image analysis platform applied in single workflows. • This is a precise, non-destructive, rapid, and low-cost method; thus, it has the potential to be adopted as a phenotyping tool for sunflower breeding and research in agroecology.