JIA-2018-09

2003 TU Ke-ling et al. Journal of Integrative Agriculture 2018, 17(9): 1999–2006 Table 1 Correlation analysis between features and seed vigor Features Minimum Maximum Mean Standard deviation CV (%) Fresh weight R 131.00 203.00 180.92 9.26 5.12 0.177 ** G 111.00 187.00 163.50 9.92 6.07 0.092 B 85.00 156.00 127.82 10.74 8.40 0.081 L* 48.00 77.00 68.02 3.67 5.40 0.120 * a* 0.00 6.00 2.52 1.02 40.47 0.265 ** b* 15.00 27.00 21.21 2.36 11.15 0.046 Hue 34.00 46.00 40.38 1.63 4.04 –0.337 ** Saturation 20.00 39.00 29.41 3.63 12.36 0.040 Brightness 51.00 80.00 70.95 3.68 5.19 0.175 ** Gray 114.00 187.00 164.14 9.64 5.87 0.118 * Width (mm) 2.56 4.19 3.45 0.27 7.75 0.198 ** Length (mm) 3.02 4.74 3.99 0.31 7.66 0.163 ** Projected area (mm 2 ) 6.39 15.54 10.95 1.56 14.22 0.217 ** Density (g cm –3 ) 0.7900 1.4097 1.1071 0.1755 15.85 0.358 ** Weight (g) 0.0005 0.0109 0.0066 0.0016 24.73 0.488 ** * and ** mean significant differences at 0.05 and 0.01 levels, respectively. Table 2 Pepper seeds selection based on single seed feature Feature Grade Total number of seeds No. of germinated seeds No. of un-germinated seeds Germination percentage (%) Selected rates (%) a* <2 52 13 39 25.0 5.5 2 171 97 74 56.7 40.9 3 105 76 29 72.4 32.1 ≥4 72 51 21 70.8 21.5 ≥3 Selection 177 127 97 71.8 57.8 Weight (g) <0.0064 171 55 116 32.2 23.2 0.0064–0.0069 48 33 15 68.8 13.9 >0.0069 181 149 32 82.6 64.1 ≥0.0064 Selection 229 182 47 79.4 76.8 Total 400 237 163 59.3 Table 3 The classification table of multilayer perceptron Category 1) Sample Observed 2) Predicted 2) 0 1 Accuracy (%) A Training 0 58 23 71.0 1 14 105 87.9 Overall percent (%) 36.0 64.0 81.0 Test 0 27 14 66.7 1 6 53 90.0 Overall percent (%) 33.3 66.7 80.5 Holdout 0 21 20 52.1 1 4 55 94.0 Overall percent (%) 24.9 75.1 76.8 B Training 0 56 25 69.6 1 15 104 87.5 Overall percent (%) 35.6 64.4 80.3 Test 0 27 14 67.0 1 6 53 89.7 Overall percent (%) 33.5 66.5 80.4 Holdout 0 22 19 53.0 1 4 55 93.8 Overall percent (%) 25.4 74.6 77.1 1) In category A, all 15 features were used as the independent variables; in category B, nine seed-vigor features were used as the independent variables. 2) 0, un-germinated seed; 1, germinated seed.