Phenomics of elite heirlooms of peppers (Capsicum annuum L.) from the Spanish centre of diversity: Conventional and high-throughput digital tools towards varietal typification

•Spanish pepper landraces still lack exhaustive characterization.•Conventional and digital traits are useful for pepper germplasm characterization.•Digital traits have a higher differentiating ability than conventional descriptors.•Fruits are responsible for most of variability within C. annuum varieties.•Typification of these materials is highly relevant for peppers breeding programs.