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Number of durum wheat samples in Classes A, B and C used for Model I and in Classes A and B used for Models II–IV. For each model, the number of samples in the calibration and validation sets was the same.
| Model | Number of samples (DON, µg/kg) | ||
|---|---|---|---|
| Class A | Class B | Class C | |
| I | 118 (≤1,000) | 37 (1,000–2,500) | 77 (>2,500) |
| II | 113 (≤1,000) | 119 (>1,000) | - |
| III | 118 (≤1,200) | 114 (>1,200) | - |
| IV | 123 (≤1,400) | 109 (>1,400) | - |
