Twenty clonal lines of intermediate wheatgrass, Agropyron intermedium (Host.) Beauv., were selected to represent the range in creep development to be found in a breeding nursery. Polycross progenies of these clonal lines were studied to determine the relationship of the degree of creeping rootedness of the 20 clones with the dry matter yield, basal ground cover, and winterkilling of their polycross progenies. This was done to determine the emphasis that should be placed on selecting for or against the creeping root character in a breeding program.No strong relationships between creep and the other characteristics were found on either dryland or irrigated land. However, there was some indication under irrigation that better initial stands were obtained with lines showing reduced creep and that these same lines were more subject to invasion by weeds in later years.It is apparent that the degree of creeping rootedness requires little consideration in breeding intermediate wheatgrass.