Table 4.
Test results of the prediction model based on external samples.
| Number | Sample source for testing | Tested model | Sample number | Coefficient of determination (R2) | Average relative error (RE %) |
|---|---|---|---|---|---|
| 1 | Jiyu 5817 | M1 | 25 | 0.873 | 5.63 |
| 2 | Zhengdan 958 | M2 | 25 | 0.861 | 6.21 |
| 3 | Jiyu5817 + Zhengdan 958 | M3 | 50 | 0.856 | 6.74 |
| 4 | Jiyu5817 | M2 | 25 | 0.821 | 8.01 |
| 5 | Zhengdan958 | M1 | 25 | 0.803 | 8.98 |
M1 represents the PLSR prediction model of “Jiyu 5817”, M2 represents the PLSR prediction model of “Zhengdan 958”, and M3 represents the PLSR prediction model of the two varieties combined. For example, Line 1 shows that Model 1 (M1) is tested using 25 unknown samples of “Jiyu 5817”, whereas Line 4 shows that Model 2 (M2) is tested using 25 unknown samples of “Jiyu 5817” (i.e., samples from Jiyu 5817 were used to test the Zhengdan 958 model.) The explanations for the other lines are similar.