Table 4-2. Adult stem rust reactions of entries in the 1975 Uniform Regional Hard Red Spring Wheat Nursery (ARS-USDA, North Dakota, Miller - Statler) Percent Severity and Reaction 1 -------------------------------------------------------- Average Entry Langdon Carrington Oakes Minot Grandin C.I. 2 ---------------------------------------------------------------------------------------- Marquis 20S 40S 40S 30S 30MS-5S 30.8 Justin 0-tMS t-5S tS-30S 0-tMS 5MS-tS,30S 1.8 Selkirk 0 0 0 0 0 0.0 Chris 0-ts 0-ts tS ts-0 ts 1.5 Waldron O,tMR-tMS 15MR t-30R 5MR,10S 15MR 2.9 ND 519 0 tMR* 0 0 tR* 0.3 ND 527 0 0 tR 0 tR 0.2 ND 531 0 tR* 0 0 tR 0.2 ND 532 tMR 15MR-tMS 10R-10MR 5MR,10S 20MR 3.8 ND 533 tR* 15MR-tMS 15R 5MR 20MR 3.9 LEW 0 0 0,tS 0 tR-tS 0.1 H678-1-64311 0 tMS 0 0,tS 20MS 3.6 WI 262T 0,tS 0,tMS 0,tS 0 15MS-tS 2.4 NEWANA 0 0 0 0 0 0.0 ND 522 0 tMR 10MR tR 5MR 1.5 ND 528 O-tMR tMR-tMS 10MR tMR-tMS 10MR-tMS 2.0 ND 534 0 0 0 0 tR* 0.1 ND 535 0-tMR tMR 1OR-5MR tR 10R 1.1 11-64-27 0 0 0 0 0,ts 0.0 MN 7083 0 0 0 0 tR* 0.1 MN 7086 0 0 0 0 0,ts 0.0 MN 70113 0 0,tMS 0 0 tMS 0.4 MN 70180 0 0 0 0 ts 0.5 MN 6728 0 0 0 0 tR* 0.1 MN 70175 tR* 0 tR tR tR* 0.4 MN 70121 0 0 0 0 tR* 0.1 Era 0 0 0,tS 0 tR* 0.1 Borah 0 0 0 0 0 0.0 Seeded: Langdon - May 14, Carrington - May 21, Oakes - May 20, Minot - May 13, Grandin - May 16. 1 = Coma - 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 same reactions. Natural inoculum - Additional inoculations of races 15B and 151 at Grandin. 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 an entry at a location was determined by multiplying percent severity by reaction were resistance (R)=0.2, moderately resistant (MR) = 0.4, intermediate (M) = 0.6, moderately susceptible (MS) = 0.8, susceptible (S) = 1.0 and t = 2.5. When a double reading occurred at a location only the severity and reaction preceding the "dash" or "comma" was used to determine the coefficient. * = Rust on peduncle.