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Table 6 Plant growth, yield and cone chemistry traits assessed over two seasons of the hop cultivation process

From: Quantitative genetic parameters for yield, plant growth and cone chemical traits in hop (Humulus lupulusL.)

 

Trait

Description

Units

nindividuals

nfamilies

Age (months)

Trans-formation

Mean

Plant growth

Number of shoots

Number of shoots at emergence

Count

1049

108

11

x0.5

5.51

    

1049

108

24

none

7.42

 

Length of the longest shoot

Length of longest shoot at emergence

Centimetres

965

108

11

x0.5

51.41

    

823

108

24

x0.5

11.67

 

Number of nodes on the longest shoot

Number of nodes on shoot of maximal length

Count

965

108

11

none

7.11

    

823

108

24

x0.5

2.99

 

Height (at flower initiation)

Height of bine from ground to top of 6 m trellis, assessed at flower initiation

Metres

1046

108

13

none

3.68

    

1047

108

25

none

5.10

 

Height (mid-season)

Height of bine from ground to top of 6 m trellis, assessed between flowering and cone maturity

Metres

976

108

14

none

4.45

    

1047

108

26

none

5.68

 

Height (at cone maturity)

Height of bine from ground to the top of 6 m trellis, assessed at cone maturity

Metres

1042

108

16

none

4.53

    

1039

108

28

none

4.54

 

Hateral length

Hength of lateral at shoulder height

Centimetres

1012

108

16

x0.5

48.22

    

982

108

28

x0.5

44.81

 

Number of nodes on lateral

Number of nodes on same lateral measured for lateral length

Count

1006

108

16

x0.5

6.55

    

1007

108

28

x0.5

6.56

 

Internode length

Length of 3rd internode from main bine, on same lateral measured for lateral length

Centimetres

231

78

16

x0.5

17.41

    

339

96

28

x0.5

26.86

 

Height to the cones

Height of bine from ground up to where bulk of cones began

Metres

663

108

16

none

1.74

    

588

108

28

none

1.75

Yield

Green cone weight

Fresh weight of cones per plant

Grams

204

107

28

x0.5

1.02

Cone chemistry

Cohumulone

Cohumulone

% dry weight

397

108

16

x0.5

2.71

    

208

107

28

x0.5

2.50

 

Humulone + adhumulone

Humulone + adhumulone

% dry weight

397

108

16

x0.5

6.41

    

208

107

28

x0.5

5.34

 

Colupulone

Colupulone

% dry weight

397

108

16

x0.5

2.31

    

208

107

28

x0.5

2.51

 

Lupulone + adlupulone

Lupulone + adlupulone

% dry weight

397

108

16

x0.5

2.16

    

208

107

28

x0.5

2.17

 

α-acid

Cohumulone + humulone + adhumulone

% dry weight

397

108

16

none

9.12

    

208

107

28

x0.5

7.84

 

β-acid

Colupulone + lupulone + adlupulone

% dry weight

397

108

16

x0.5

4.48

    

208

107

28

x0.5

4.69

 

Cohumulone (% of α-acid)

Cohumulone/α-acid

% dry weight

397

108

16

x0.5

0.30

    

208

107

28

x0.5

0.32

 

α-acid:β-acid

α-acid/β-acid

Ratio

397

108

16

x0.5

2.21

    

208

107

28

x0.74

1.80

 

α-acid:total resin

α-acid/(α-acid + β-acid)

Ratio

397

108

16

x0.5

0.67

    

208

107

28

x0.5

0.62

  1. n individuals’ refers to the number of individuals assessed for each trait. 'n families’ refers to the number of families assessed for each trait. 'Age’ refers to the age of the plants at the time that a trait was assessed in number of months after the trial was planted. 'Transformation’ refers to the power transformation used to standardise the variance of each trait (x). 'Mean’ refers to the backtransformed mean of all assessed individuals for each trait.