Ontario Grain Farmer September 2024

29 ONTARIO GRAIN FARMER SEPTEMBER 2024 Hybrid Hybrid CHU Exeter environments Ridgetown environments Overall mean 1 2 3 4 5 DKC36-48RIB 2600 7 50 15 38 118 30 * A5424G2 RIB 2625 10 91 36 36 132 44 * A5959G2 RIB 2725 25 106 23 23 50 37 * DKC39-55RIB 2725 30 108 33 18 379 59 * P9316Q 2750 7 61 42 24 98 34 * P9466AML 2800 14 69 69 18 139 45 * DKC42-05RIB 2800 17 108 52 24 106 48 * P9535AM 2825 47 75 23 32 198 56 * P9624Q 2850 12 13 17 23 80 22 * B96H83AM 2850 11 43 13 24 53 24 * DKC44-80RIB 2850 12 54 16 52 56 32 * A6566G8 RIB 2850 13 138 12 70 94 43 * NK9535-V 2850 20 182 54 194 64 76 nd A6572G2 RIB 2850 27 137 83 78 442 102 nd NK9601-AA 2875 4 20 102 96 72 36 * NK9653-DV 2875 5 47 88 100 110 48 * DKC45-74RIB 2875 30 35 90 90 731 91 nd *Company removed 2875 66 266 138 204 778 209 + DKC46-40RIB 2900 35 174 32 21 30 45 * P97299AM 2900 36 87 76 51 381 86 nd *Experimental 2900 29 130 62 140 382 106 nd P9823Q 2925 31 60 21 35 21 31 * *Experimental 2925 107 445 124 247 1317 275 + P9845PCE 2950 48 105 52 160 483 116 nd DKC49-09RIB 2975 41 179 55 100 214 98 nd B00R96AM 3000 8 6 66 40 33 22 * P0035AM 3000 37 12 23 33 112 33 * P0075AM 3000 22 21 12 42 206 35 * NK9991-5122 3000 45 18 118 213 112 73 nd NK0007-AA 3000 132 529 75 120 285 166 nd A7199G9 RIB 3025 64 68 76 22 659 84 nd NK0243-D 3075 23 11 45 46 41 30 * *Experimental 3100 86 120 112 159 162 125 nd B04S21AM 3125 18 7 35 60 154 33 * B04D72Q 3125 24 10 101 63 384 57 * P04922Q 3125 44 41 152 111 157 87 nd P0404AM 3125 39 97 70 129 465 113 nd P04511AM 3125 58 84 186 266 465 164 nd P0529Q 3150 15 6 34 24 105 24 * MZ 4577SMX 3150 30 39 49 33 57 41 * SUSCEPTIBLE CHECK 3175 100 100 100 100 100 100 MZ 4608SMX 3200 5 5 29 25 58 17 * B07M64AM 3200 25 37 68 16 52 37 * MZ 4799SMX 3250 4 5 17 48 33 14 * P0806AM 3250 20 45 71 14 71 36 * P0859AM 3250 23 182 39 135 246 89 nd Hybrid diff (P-value) <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001 Average DON in Check (ppm) 68.9 13.2 30.0 9.8 4.0 16.0 No. observations per hybrid 3 3 3 3 3 15 Table 2. DON risk assessment indices by hybrid relative to susceptible check from 2020-2023. Hybrids are sorted by CHU rating. Always use one-year data with caution. The colour scheme highlights hybrid effects within column. An index=100 means DON equal to the susceptible check. For example, this hybrid produced 30 per cent of DON compared to the susceptible check hybrid across environments. Hybrids with an asterisk (*) are statistically lower in DON compared to the susceptible check hybrid. Hybrids with “nd” are not different statistically compared to the susceptible check hybrid. Hybrids with “+” have statistically higher DON compared to the susceptible check hybrid. In this hybrid, DON was 2.75x higher than the susceptible check hybrid. An example of variability across environments Susceptible check hybrid

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