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On-Farm Strip Trials vs. Replicated Performance Trials for Cultivar Evaluation

^a Dep. of Plant Agriculture, Univ. of Guelph, Guelph, ON, N1G 2W1, Canada
^b Cereal Lead, Ontario Ministry of Agriculture, Food, and Rural Affairs, Guelph, ON, N1G 5C9, Canada
^c Corn Lead, Ontario Ministry of Agriculture, Food, and Rural Affairs, Dep. of Plant Agriculture, Univ. of Guelph, Guelph, ON, N1G 2W1, Canada
^d Food Res. Program, Agriculture and Agri-Food Canada, Guelph, ON, N1G 5C9, Canada

View larger version (27K): [in a new window]   Fig. 1. Best linear unbiased predictors (BLUP) of cultivars based on strip trials vs. performance trials. (A) 1998, (B) 1999, and (C) 2000. Cultivars 2510, 2518, 2526, 2533, 2537, 2540, 2549, 2557, 2560, and 2737 are from Pioneer Hi-Bred International Inc. Complete names for other cultivars are: ARI = OAC Ariss, ASH = Ashland, CAL = Caledonia, CAR = AC Cartier, CM67 = CM951067, CM959 = CM95009, CM96 = CM96097, DEX = AC Dexter, DLT = AC Delta, ESS = AC Essex, FRE = Freedom, FUN = Fundulea, FWB = FWB728, HAN = Hanover, HAR = Harus, HUR = Huron, KAR = Karena, LJH = LJH95, MAC = AC McKinnon, MAR = Marilee, MAX = Maxim, MEN = Mendon, MON = OAC Montrose, MOR = AC Morley, MOU = AC Mountain, MWH = MWH95-069531, PAT = Patriot, PLA = Platinum, ZOR = AC Zorro, RC98 = RC98109, RON = AC Ron, S93 = S93-1, SUP = Superior, TW95 = TW95412, TW96 = TW96273, TW97 = TW97, WIS = Wisdom.

View larger version (29K): [in a new window]   Fig. 2. t-Values of cultivars based on strip trials vs. performance trials. (A) 1998, 1999, and (C) 2000 (see Fig. 1 for complete cultivar names).

View larger version (19K): [in a new window]   Fig. 3. Predictability of the performance trials. (A) 1998 vs. 1999; (B) 1999 vs. 2000 (see Fig. 1 for complete cultivar names).

View larger version (18K): [in a new window]   Fig. 4. Predictability of the strip trials. (A) 1998 vs. 1999; (B) 1999 vs. 2000 (see Fig. 1 for complete cultivar names).

View larger version (17K): [in a new window]   Fig. 5. Relationship between number of trials and prediction error of the best linear unbiased predictions.