Table 7 Principal component coefficient, eigenvalue and contribution rate.

From: Comprehensive evaluation of drought tolerance of six Chinese chestnut varieties (clones) based on flavonoids and other physiological indexes

Principal components

X1

X2

X3

X4

X5

X6

X7

X8

X9

X10

X11

X12

X13

X14

X15

Eigen value

Contribution rate (%)

Cumulative contribution rate (%)

1

0.775

− 0.035

0.422

0.569

0.942

0.878

0.397

− 0.873

− 0.705

0.150

0.037

0.427

0.325

0.325

− 0.506

4.855

32.364

32.364

2

0.130

− 0.360

0.617

0.773

− 0.016

− 0.191

− 0.110

− 0.275

0.456

0.822

− 0.326

0.337

− 0.726

− 0.726

0.569

3.732

24.883

57.247

3

0.538

− 0.765

0.545

− 0.107

− 0.317

0.040

− 0.591

− 0.136

0.024

0.089

0.463

− 0.662

0.508

0.508

0.581

3.167

21.115

78.362

4

0.257

0.364

− 0.221

0.221

− 0.061

0.230

0.556

0.243

0.481

0.535

0.706

− 0.432

− 0.002

− 0.002

− 0.092

1.932

12.879

91.241