TRIAL DESCRIPTION AND SUMMARY
 
 The 1991 Uniform Regional Hard Red Spring Wheat Performance Nursery was planted at 22 
 locations and harvested at 21 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 Crookston (hail) and Mead were not used in the overall 
 average nor the stability parameter analysis. No data were received from Pullman, 
 Washington. Data from 21 stations are given in Tables 2-1 to 2-22.
 
 For entries from these stations, the highest average yield was 100 bu/A at Aberdeen, Idaho 
 and the lowest yield was 18 bu/A at Redfield, South Dakota. The average yield was 43.4 bu/A 
 and eight wheats were in the first LSD unit (3.7) from the top yielding entry. It is 
 interesting to note that in 1991 only early to head entries (all from South Dakota) were in 
 the top five. However, not all early to head entries were high yielding.
 
 Entries SD 8074 was earliest to head, 24 days after June 1 closely followed by SD 8072, SD 
 3080, Butte 86, and ND671 at 25 days, while Marquis and Era were latest at 32 days. The 
 average yield and test weight data for 1991, 1990-91, and 1989-91 are shown in Table 3-1. 
 Seven wheats exceeded Stoa, the highest yielding check in 1991. SD8072, SD8073, and SD8074 
 were the highest yielding in 1991, while SD3056 was highest in 1990-91.  The highest line 
 for test weight SD 3080 at 60.1 lb/bu. ND 655** was highest in 1990-91.
 
 Stability parameters for entries in 1990 and are given in Table 3-2.  The check Era showed 
 considerable instability across these environments in 1991 as evidenced by it large 
 deviations. Other entries with high deviations were C1982-309 and IDO367.
 
 Greenhouse seedling and adult plant field reactions to stem and leaf rust are shown in 
 Tables 4-1 to 4-4, and Fusarium head blight in 4-5.