TRIAL DESCRIPTION AND SUMMARY
 
 The 1990 Uniform Regional Hard Red Spring Wheat Performance Nursery was planted at 23 
 locations and harvested at 22 locations in Minnesota, North Dakota, South Dakota, Montana, 
 Idaho, Wyoming, Wisconsin, Washington, Nebraska, and Canada (Table 1). The nursery contained 
 32 entries, 5 checks (4 tall, 1 semidwarf), and 27 experimentals (12 talls and 15 
 semidwarfs). Yield data obtained from Dickinson, St. Paul, Sheridan, and Mead were not used 
 in the overall average nor the stability parameter analysis. Data from 23 stations are given 
 in Tables 2-1 to 2-24.
 
 For entries from these stations, the highest average yield was 112 bu/A at Aberdeen, Idaho 
 and the lowest yield was 17 bu/A at Williston, North Dakota. The average yield was 51.2 bu/A 
 and ten wheats were in the first LSD unit (3.7) from the top yielding entry.
 
 Entries SD 3052, SD 3053, SD 3055, SD 3056, and N87-0002 were earliest to head and averaged 
 25 days after June 1 closely followed by SD 3032 at 22 days, while Era was latest at 31 
 days. The average yield and test weight data for 1989, 1988-89, and 1987-89 are shown in 
 Table 3-1. Five wheats exceeded Stoa, the highest yielding check in 1990. N86-0542**, 
 N87-0002**, MN86165** and ND659** were the highest yielding in 1990, while Stoa was highest 
 in 1989-90. Five of the entries exceeded 60 lb/bu in 1990, and the highest two lines were 
 MN86165** and ND 656. ND 655** was higher in 1989-90.
 
 Stability parameters for entries in 1990 and are given in Table 3-2.
 
 Entries with the greatest deviations from regression were PH984045** and MT 8651. Greenhouse 
 seedling and adult plant field reactions to stem and leaf rust are shown in Tables 4-1 to 
 4-3, tan spot in Table 4-4, seedling stem rust in Table 4-5 and Scab Index in 4-6.