THE UNIFORM REGIONAL HARD RED SPRING WHEAT NURSERY The 22 entries in the 1973 Uniform Regional Hard Red Spring Wheat Nursery are listed below: Entry No. Cross or Variety Sel. No. Entered Source ---------------------------------------------------------------------- 1 MARQUIS 3641 1929 Canada 2 JUSTIN 13462 1959 ND 3 SELKIRK 13100 1953 Canada 4 CHRIS 13751 1960 USDA-MN 5 WALDRON 13958 1964 ND 6 ND140/ND363 ND491 1970 ND 7 WALDRON/RL4205 ND507 1972 ND 8 ND455*2/AGATHA/3/3*ND455//Tl673/3*KT48 ND510 1972 ND 9 ND487/WALDRON ND518 1973 ND 10 ND480//POLK/WISC261 ND519 1973 ND 11 JT/ND142//WISC261 ND520 1973 ND 12 HRY*5/P54//4*LT/3/Rf4R H681-4-5 1973 WI 13 ERA 13986** 1968 USDA-MN 14 II-55-14/II-60-105 II-64-27** 1972 USDA-MN 15 do II-64-33** 1972 USDA-MN 16 ND476//CLY/ND122 ND508** 1972 ND 17 ND441sib*2/AGENT//3*ND441sib/T.der./ 3/2*ND441/SUWON92 ND521** 1973 ND 18 ND491/FLETCHER ND522** 1973 ND 19 ND487/4/WALDRON/3/AGENT/Tl673-KT48// SUWON92 ND525** 1973 ND 20 PJ60/3/HRY*7/P54//KI84/7*WIS250/4/ K184/4*WIS250 H678-1-6-9** 1969 WI 21 JT/3/NRN10/BVR14//4*CNT MT7150** 1973 USDA-MT 22 SK/3/NRNIO/BVR14//CNT MT7028** 1973 USDA-MT ---------------------------------------------------------------------- ** Semidwarf TRIAL DESCRIPTION AND SUMMARY The Uniform Regional Hard Red Spring Wheat Nursery was planted at 24 locations and harvested at 23 in Minnesota, Montana, North Dakota, Idaho, Nebraska, Wyoming, Wisconsin, South Dakota, Washington and Canada. Hail destroyed the test at Langdon. Data from 23 stations are given in Tables 1-1 to 1-23. The average yield at the three irrigated stations, Aberdeen, Idaho, Carrington, North Dakota, Bozeman, Montana was 85.3, 65.3 and 64.1 Bu/A, respectively. For the entries grown at the non-irrigated stations, the highest average yield was 63.8 Bu/A at Minot, North Dakota, while the lowest average was 7.8 Bu/A at Lind, Washington. Average yields and bushel weights in 1973 and for the three-year period 197173 for entries in this nursery are shown in Table 2. The entries Era, ND522 and ND508 yielded 48.6, 48.1 and 47.5 Bu/A, respectively. North Dakota selection ND519 had the best bushel weight with 60.9 Lbs/Bu followed by 11-64-27 with 60.5 Lbs/Bu. Miscellaneous agronomic and disease data are summarized in Table 3. The entries ND519, ND520 and H678-1-6-9 headed at 62 days, while Marquis, Era and 11-64-33 headed in 68 days. Waldron and ND510 were the first to mature with a similar value of 94 days, while 11-64-27 and ND521** were the last with 99 days. The entries Justin, ND507 and H681-4-5 tended to shatter more than other lines. North Dakota selections ND522 and ND525 had the best 1000 kernel weight with 39.4 and 39.2 gms, respectively. Adult field reactions to leaf and stem rust are given in Table 4. Stem rust was relatively scarce in the spring wheat region in 1973. All entries except Marquis possess adequate resistance. Leaf rust isolates continued to show aggressiveness on spring wheat varieties.