Differential effects of the endosperm protein fractions from tritordeum on the SDS-sedimentation volume

The presence of the Hordeum chilense Roem. et Schult. proteins in the endosperm of the tritordeums (amphiploids H. chilense x wheat) has been related to the flour quality of these cereals. The objective of this work has been to evaluate the changes in the amount of Osborne’s protein fractions and its repercussion on flour quality for these amphiploids. The protein fractions were obtained from several lines of hexa- and octoploid tritordeums along with their durum and bread wheat parents, after a sequential extraction. The results indicated that although the tritordeums present higher protein contents than the wheats, the different fractions were similar to those observed in wheat. On the other hand, the hexaploid tritordeums showed higher SDS-sedimentation values for all fractions than their wheat parents. Nevertheless, the octoploid tritordeums and bread wheats presented similar values. The differences among species were not great when the quality index was used.