Abstract
Gene action for resistance to P. striiformis was determined in minor gene lines of wheat [Triticum aestivum] derived from crosses of Pl 178383/Itana//commercial cultivars. The minor gene lines were intercrossed in 1 diallel and intercrossed with susceptible winter wheat cultivars in a 2nd diallel. The 2 diallel analyses showed the presence of additional gene action and high heritabilities and indicated that this apparently general type of resistance could be manipulated easily in a breeding program.