Gossypol and gossypurpurin in cottonseed of different varieties ofG. barbadense andG. hirsutum, and variation of the pigments during storage of the seed

Selected varieties of cottonseed comprising three Sea Island cottons, four Egyptian cottons, and 10 upland cottons providing two or more varieties having the following characteristics: short, intermediate, and long staple; low, intermediate, and high content of lipids; and low, intermediate, and high content of protein, were planted and grown under as nearly identical conditions as possible.