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Table 2 Calibration statistics for equations generated for prediction of biomass saccharification in transgenetic rice straws

From: A precise and consistent assay for major wall polymer features that distinctively determine biomass saccharification in transgenic rice by near-infrared spectroscopy

  Calibration Cross validation
N Terms DT SCM Spectrum range (nm) Mean SD SEC R 2 SECV R 2 cv RPD
Pretreatment (% total)
 Pentose 140 8 2,5,5,2 DET 1108–2492 9.64 1.26 0.37 0.91 0.42 0.89 2.97
 Hexoses 142 10 1,4,4,1 SNV 780–2492 19.34 7.95 1.16 0.98 1.35 0.97 5.89
 Total 141 10 2,4,4,2 SNVD 780–2492 29.26 6.81 1.00 0.98 1.38 0.96 4.95
Enzymatic hydrolysis (% total)
 Pentose 138 9 2,5,5,2 None 780–2492 23.90 4.01 0.69 0.97 0.83 0.96 4.80
 Hexoses 143 10 2,10,10,2 None 780–2492 46.62 3.40 1.13 0.89 1.33 0.85 2.56
 Total 141 10 2,4,4,2 SNVD 780–2492 70.74 6.81 1.00 0.98 1.38 0.96 4.95
Total sugar released (% dry matter)
 Pentose 141 8 2,10,10,2 DET 1108–2492 15.21 1.59 0.48 0.91 0.54 0.88 2.93
 Hexoses 139 9 2,10,10,2 DET 780–2492 30.38 4.88 1.08 0.95 1.24 0.94 3.95
 Total 138 9 1,4,4,1 WMSCn 1108–2492 45.31 3.97 1.21 0.91 1.38 0.88 2.88
Fermentable hexoses (% total hexoses) 144 9 2,8,8,2 WMSC 408–2492 71.17 10.11 1.78 0.97 2.20 0.95 4.60
  1. N sample number, Terms number of principal component used for calibration, DT derivative treatment, SCM scatter correction methods, SD standard deviation of reference value, SEC standard error of calibration, R 2 determination coefficient, SECV standard error of cross validation, R 2 cv determination coefficient of cross validation, RPD ratio performance deviation (SD/SECV), DET detrend, SNV standard normal variate, SNVD a combination of standard normal variate and detrend, WMSC weighted multiple scatter correction