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Table 1 Calibration statistics for equations generated for prediction of wall polymers 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
Cellulose 140 3 2,4,4,2 SNVD 408–2492 25.11 4.45 1.55 0.88 1.59 0.87 2.79
Hemicellulose
 Ara (%) 145 5 1,4,4,1 SNV 408–2492 13.22 1.37 0.75 0.70 0.79 0.66 1.73
 Xyl (%) 139 9 1,4,4,1 SNV 1108–2492 75.08 2.63 1.07 0.84 1.20 0.79 2.18
 X/A 142 5 1,4,4,1 SNV 408–2492 5.75 0.77 0.37 0.77 0.39 0.75 1.98
Lignin
 ASL 141 9 1,4,4,1 MSC 1108–2492 3.13 0.41 0.12 0.91 0.15 0.87 2.78
 AIL 140 5 1,4,4,1 SNV 408–2492 8.20 1.40 0.71 0.74 0.76 0.70 1.82
 Total 140 9 0,0,1,1 WMSC 408–2492 11.33 1.55 0.69 0.80 0.75 0.77 2.07
  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), SNVD a combination of standard normal variate and detrend, SNV standard normal variate, MSC standard multiple scatter, WMSC weighted multiple scatter correction, Ara arabinose, Xyl xylose, X/A xylose/arabinose, ASL acid soluble lignin, AIL acid insoluble lignin