Table 4-2. Adult stem rust reactions of entries In the 1983 uniform Regional Hard Red
Spring Wheat Performance Nursery USDA-ARS NDSU (Miller-Statler)].
Percent Severity and Reaction 1
------------------------------------------------------- Ave.
Entry FARGO Oakes Minot Carrington Langdon C.I. 2
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Marquis 60S 40SMS 25SMS 40MSS 40SMS 38.1
Chris 0-tS,30MS 0-10S 0-tS 0-tS t-5S 2.5
Waldron 5-15RMR,20M 0,10MS tR* tR tR* 0.9
Era t-5MRMS 0 0 0 0 0.5
Butte 15RMR 0 0 0 0 0.9
SD2861 25MRR 0 0 5R* tR* 1.8
SD2912 5R,25MRR 0 tR* tR* 0 0.3
SD8026 25MRMS 0 0 0 0 3.0
SD2925 10RMR tR tR* tR 0 0.9
MT8017 40MSS 0 0 0 0 7.2
MT7926 t-10S 0 tR*,tMR tR 0,tMS 0.7
MT8043 50MS tS-tMR 0 tR 0 8.8
MN73167 tRMR 0 0 tRMR 0 0.3
MN7529 tR 0 0 0 0 0.1
MN81070 0 0 0 0 0 0.0
MN81101 0,5MR,5MS 0 0 0 0 0.0
ND582 0-tR 0 0 0 0 0.1
ND586 25MSMRS ts 0-tS tS 0-tMS 5.1
ND593 0,10MR* 0 0 0 0 0.0
ND597 tR 0 0 0 0 0.1
ND603 25MR 0 0 tR 0 2.1
77S8002 tMR,10MRMS S 0 0 0 0.2
77S4342 tMR 0 0 0 0 0.2
HS79-149 5MR+ 0 0 0 0 0.4
HS78-1139 tMR,5-20MS,0 0 0,tS 0 0,tS 0.2
HS80-236 t-10RMR 0 tR* tR tR* 0.7
PR2369 10MRR,15MSMR 0 0 tR 0 0.7
X7993 0,tMR 0 0 0 tR* 0.1
SBT428 10-20M 0 0 0 0,5S 1.8
Challenger
(WRP-1) 10MR 0 0,5S tR 0 0.9
WRP8-30 10MRMS 0 tR* tR 5R* 1.5
WRP80-32 30MSS 0 tR* tR tR* 5.7
WA6922 15RMR 0 0,5S tR 0 1.0
WA6923 t-5MSS 0 0 tMS-0 tR* 1.0
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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 reaction. Natural inoculum: Additional inoculations of races 15(TLM), 15(TNM)
and 151(QSH) at Fargo.
t = (trace) less than 5% severity. * = majority of the rust infections are on the
peduncle. + = severity was 15-25% greater at ripe stage of growth. Majority of the
readings were made at soft dough.
2 = Average Coefficient of infection (Ave. C.I.). C.I. for each reading was calculated
by multiplying percent severity by reaction where 0 = 0.0, R = 0.2, MR = 0.04, M = 0.6,
MS = 0.8 and S = 1.0.