Characterisation of induced high protein and high lysine mutants in barley

Two barley mutants, named Notch‐1 and Notch‐2, possessing elevated protein and lysine were chemically characterised and compared with Hiproly (CI 3947). The increased level of lysine and other essential amino acids in the mutants were a consequence of a substantial reduction in the prolamin fraction with a simultaneous increase in the salt‐soluble fraction. Increased embryo/endosperm ratio in the mutants also contributed towards changes in amino acid composition. The Notch mutants were superior to both NP‐113 (parent) and Hiproly with regard to the chemical score for lysine and the biological value.