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Table 1 Calibration and external validation statistics for RPR and breaking force in sugarcane stalks

From: A high-throughput phenotyping method for sugarcane rind penetrometer resistance and breaking force characterization by near-infrared spectroscopy

 

Calibration

Cross-validation

External validation

Rank

N

SCM

Spectrum range

Mean

SD

RMSEC

R2

RPD

RMSECV

R2cv

RPD

N

RMSEP

R2ev

RPD

RPR (N·mm−2)

23

458

SNV

5669.7–9626.9, 10406–11200.6

42.0

7.62

0.40

0.997

19.60

0.74

0.991

10.30

68

0.76

0.990

10.20

Breaking force (N)

12

350

FD + SNV

4882.9–6464.2, 8037.9–9626.9

20.3

6.08

2.15

0.880

2.88

2.51

0.830

2.42

90

2.08

0.849

2.58

  1. RPR, rind penetrometer resistance; Rank, latent variables used in PLS regression; N, genotype number; SCM, scatter correction methods; SD, standard deviation of reference value; RMSEC, root mean square error of calibration; R2, determination coefficient of calibration; R2cv, determination coefficient of cross-validation; RMSECV, root mean square error of cross-validation; RMSEP, root mean square error of external validation; R2ev, determination coefficient of external validation; RPD, the ratio of prediction to deviation; SNV, standard normal variate, FD, first derivative, FD + SNV, a combination of FD and SNV
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Plant Methods

ISSN: 1746-4811