Table 4-2. Adult stem rust reactions of entries in the 1976 Uniform Regional Hard Red Spring Wheat nursery (ARS-USDA, North Dakota, Miller-Statler) Percent Severity and reaction 1 --------------------------------------------------------------------------- Average Entry Langdon Carrington Oakes Minot Fargo C.I. 2 Marquis 20MS-10S 20-MS-10S 30MS-20S 25MR-25S 50MS 21.2 Justin 0 0 0,25S 0,30S 15S-15MS 3.0 Selkirk 0 0 0 tR tR,tMS 0.2 Chris 0-ts 0-tS 0,ts 5MS-tS ts 1.3 Waldron t-5MR-tMS 10MR 10MR,tS 15MR-15R,20MS 15R-5MR,25S 3.6 ND519(BUTTE) 0 0 0 0-5R 10R-10MR 0.4 ND531 0 0 0 0 10R 0.4 ND536 tMR 15MR-5MS 1OR 5MR-5R 10MR-10MS 3.0 ND538 0 0 0 0 tR 0.1 ND541 0 0 0 0 10R-tMS 0.4 ND542 0 tR tR 5R 10R-tMS 0.8 ND544 0 0 0 tR 10R-tMS 0.5 SD2273 tR tR 0 tR tR 0.4 ND522 tR tMR 5MR,tMS ----- 1OR-tMS 1.1 ND543 0 tR tR 5R tR 0.5 II-64-27 0 0 0 0 0 0.0 MN7086 0 0 tR tR tR,5M 0.3 MN70113 0 0 0 0 tR 0.1 MN70175 tR tR tR ----- 0 0.4 MN70170 0 tR,20MR 5R 5R-5MR 10MR 1.3 MN70202 0 0 0 tR ts 0.6 MN7125 0 0 0 0 0 0.0 MN7142 0 0 0 0 0 0.0 MN7155 0 0 0 0 0 0.0 MN7170 0 0 0 tR 0 0.1 SD2271 0 5MR 0 15MR-5MS tR,10MR,lOS 1.7 SD2288 tMS 30S 15S 5MS-5S 25S 15.2 MT749 tR 5MR tMR 20MR-5MS 10MR 3.1 MT7416 0 tMR,tMS 0 tR tMR,10MS 0.5 H678-1-64311 0 0,tMS 0 t-5S ts 1.0 II-62-48 0 0 0 0 tMR-tMS 0.2 Era 0 0 0 tR tMR-tMS 0.3 Seeded - Langdon, May 1; Carrington, May 5 (flood irrigation); Oakes, May 7; (overhead irrigation); Minot, April 28; Fargo, May 12. 1 = Comma- Separation of plants into 2 or more reaction classes (segregation or seed mixture) Dash - Range in reaction on each plant or range in severity between plants with the same reactions. Natural inoculum - Additional inoculations of races 15B and 151 at Fargo. Readings at soft dough to mid dough stages. 2 = Av. C.I. Average coefficient of infection is the average of the 5 coefficients of infection for each entry. Coefficient of infection for each reading was determined by multiplying percent severity by reaction where resistant (R) = 0.2, moderately resistant (MR) = 0.4, intermediate(M) = 0.6, moderately susceptible (MS) = 0.8 and susceptible (S) = 1.0. When a double reading occurred, only the percent severity and the response preceding the comma or dash was used to determine the coefficient. Trace severity(t)=2.5 percent.