The fruits of Malus domestica are consumed in their own right and also undergo industrial procedures to form different products such as juice, cider, and vinegar. Industrialization creates apple pomace, a residue that can be used for the generation of bioactives, adding value to the raw material, and diminishing environmental pollution. The objective of this chapter is to analyze the bioactives present in apples, the production of dietary fibre, the soluble fibre pectin and phenolic compounds from apple residues, and to evaluate the relationship between genotype and phenotype in the breeding of new varieties.