Table 4 Loading matrix of principle components of quality indexes under different maturity levels (Ⅰ ~ Ⅲ).

From: Comprehensive evaluation of oil quality of 98 olive germplasms at 3 maturity levels from the Bailong River Valley area in Longnan, China

Index

PC1

PC2

PC3

PC4

PC5

PC1

PC2

PC3

PC4

PC5

PC1

PC2

PC3

PC4

PC5

Oil content

0.04

− 0.19

0.02

− 0.15

0.73

− 0.14

− 0.10

0.04

− 0.14

0.82

− 0.20

0.31

0.12

0.60

0.10

C16:0

0.77

− 0.02

0.37

− 0.02

0.09

0.86

− 0.15

0.06

0.24

− 0.01

0.86

0.19

− 0.17

0.06

0.09

C18:0

− 0.06

0.20

− 0.17

0.88

− 0.01

− 0.12

0.94

− 0.10

− 0.01

0.03

− 0.08

− 0.15

0.90

0.06

0.08

C20:0

− 0.08

− 0.04

− 0.02

0.93

0.13

− 0.03

0.87

− 0.02

− 0.04

0.09

− 0.10

0.01

0.84

0.15

− 0.01

C16:1

0.86

− 0.08

0.03

− 0.18

0.15

0.89

− 0.21

0.13

− 0.06

0.17

0.85

0.19

− 0.17

0.18

− 0.14

C18:1

− 0.56

− 0.20

− 0.71

0.09

− 0.18

− 0.54

0.20

− 0.33

− 0.69

− 0.06

− 0.62

− 0.57

0.23

0.00

− 0.36

C20:1

− 0.80

− 0.25

0.07

− 0.04

0.13

− 0.81

− 0.18

0.04

− 0.14

0.08

− 0.86

0.08

− 0.10

0.09

− 0.10

C18:2

0.24

0.24

0.71

− 0.21

0.20

0.16

− 0.26

0.36

0.78

0.08

0.30

0.67

− 0.25

− 0.06

0.39

C18:3

− 0.05

− 0.11

0.77

0.02

− 0.25

0.01

− 0.17

0.76

0.19

0.00

0.02

0.78

− 0.14

0.10

− 0.09

Squalene

0.04

0.15

0.06

0.23

0.73

0.18

0.21

0.01

0.11

0.77

0.16

0.01

0.09

0.77

− 0.06

β—Sitosterol

0.06

0.97

0.05

0.07

− 0.01

0.15

0.07

0.84

− 0.05

− 0.03

0.15

0.78

0.15

− 0.17

− 0.25

Total polyphenols

0.08

0.97

0.05

0.08

0.00

0.04

0.25

− 0.27

0.67

− 0.12

0.06

− 0.11

0.09

0.02

0.87

α—Tocopherol

− 0.06

− 0.05

0.42

− 0.12

− 0.52

− 0.06

− 0.06

0.50

− 0.03

− 0.59

− 0.08

0.31

− 0.04

− 0.71

− 0.02

Characteristic value

3.33

2.37

1.74

1.29

1.17

3.56

2.10

1.62

1.38

1.14

3.76

1.91

1.58

1.26

1.08

Contribution rate(%)

25.61

18.22

13.38

9.91

9.00

27.40

16.11

12.48

10.62

8.79

28.92

14.65

12.18

9.72

8.27

Cumulative contribution rate (%)

25.61

43.83

57.21

67.11

76.11

27.40

43.51

55.99

66.61

75.40

28.92

43.57

55.76

65.47

73.75