EFFECT ON FLOUR QUALITY FROM INCLUSION OF THE HORDEUM-CHILENSE GENOMEINTO THE GENETIC BACKGROUND OF WHEAT

Hordeum chilense Roem. et Schulz. is a South American wild barley that has been used for the attainment of amphiploids with durum and bread wheats. These amphiploids, called tritordeums (XTritordeum Ascherson e t Graebner), have shown unique agronomic characteristics and potential breadmaking quality. The H. chilense genome in durum and bread wheats was studied in six durum and six bread wheats and in the hexa- and oc toploid tritordeum lines derived from them. In general, the grain qual ity characteristics of tritordeums were inferior to those of the wheat parents. However, both hexa- and octoploid tritordeums exhibited flou r quality characteristics that were similar to those of bread wheat bu t not to those of durum wheat. The effects of the H(ch) genome were gr eater in the absence of the D genome.