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Table 2 Variable importance ranking for the models of heifer conception

From: The creation and evaluation of a model to simulate the probability of conception in seasonal-calving pasture-based dairy heifers

 

LR

GAM

MLR

1

Year: 2003

Month: May

Month: June/July

2

Year: 2008

Year: ≥ 2013

CIV PTA

3

Year: 2004

Year: 2011

Age * Month: June/July

4

Month: June/July

Breed: HO

Breed: NR

5

Age * Month: June/July

Year: 2005

Month: May

6

Breed: NR

Year: 2012

Breed: MO

7

Year: ≥ 2013

Month: June/July

Age * Month: May

8

CIV PTA

Age

Breed: other

9

Year: 2012

CIV PTA

Breed: NO

10

Month: May

Year: 2009

Breed: HO

11

Year: 2005

Year: 2010

Breed: JE

12

Breed: NO

Year: 2006

Breed: JEX

13

Breed: HO

 

Breed: FRX

14

Year: 2002

 

Age

15

Age * Month: May

  

16

Breed: JE

  

17

Breed: MO

  

18

Year: 2009

  

19

Year: 2010

  

20

Age

  

21

Year: 2007

  

22

Breed: FRX

  

23

Breed: JEX

  

24

Year: 2011

  

25

Breed: other

  

26

Year: 2006

  
  1. Legend: LR logistic regression model, GAM generalised additive model, MLR mixed logistic regression model, CIV calving interval PTA (days), FRX Friesian cross, HO Holstein, JE Jersey, JEX Jersey cross, MO Montbeliarde, NO Normande, NR Norwegian Red
  2. * indicates an interaction between two variables